diff --git a/examples/vk.xml b/examples/vk.xml
index fc5f7e0..5b0bb3e 100644
--- a/examples/vk.xml
+++ b/examples/vk.xml
@@ -13,9 +13,9 @@ machine-readable definition of the API, parameter and member validation
 language incorporated into the Specification and reference pages, and other
 material which is registered by Khronos, such as tags used by extension and
 layer authors. The authoritative public version of vk.xml is maintained in
-the master branch of the Khronos Vulkan GitHub project. The authoritative
-private version is maintained in the master branch of the member gitlab
-server.
+the default branch (currently named main) of the Khronos Vulkan GitHub
+project. The authoritative private version is maintained in the default
+branch of the member gitlab server.
     </comment>
 
     <platforms comment="Vulkan platform names, reserved for use with platform- and window system-specific extensions">
@@ -23,6 +23,7 @@ server.
         <platform name="xlib_xrandr" protect="VK_USE_PLATFORM_XLIB_XRANDR_EXT" comment="X Window System, Xlib client library, XRandR extension"/>
         <platform name="xcb" protect="VK_USE_PLATFORM_XCB_KHR" comment="X Window System, Xcb client library"/>
         <platform name="wayland" protect="VK_USE_PLATFORM_WAYLAND_KHR" comment="Wayland display server protocol"/>
+        <platform name="directfb" protect="VK_USE_PLATFORM_DIRECTFB_EXT" comment="DirectFB library"/>
         <platform name="android" protect="VK_USE_PLATFORM_ANDROID_KHR" comment="Android OS"/>
         <platform name="win32" protect="VK_USE_PLATFORM_WIN32_KHR" comment="Microsoft Win32 API (also refers to Win64 apps)"/>
         <platform name="vi" protect="VK_USE_PLATFORM_VI_NN" comment="Nintendo Vi"/>
@@ -52,7 +53,7 @@ server.
         <tag name="FUCHSIA"     author="Google LLC"                    contact="Craig Stout @cdotstout, Jesse Hall @critsec"/>
         <tag name="GGP"         author="Google, LLC"                   contact="Jean-Francois Roy @jfroy, Hai Nguyen @chaoticbob, Jesse Hall @critsec"/>
         <tag name="GOOGLE"      author="Google LLC"                    contact="Jesse Hall @critsec"/>
-        <tag name="QCOM"        author="Qualcomm Technologies, Inc."   contact="Maurice Ribble @mribble"/>
+        <tag name="QCOM"        author="Qualcomm Technologies, Inc."   contact="Jeff Leger @jackohounhd"/>
         <tag name="LUNARG"      author="LunarG, Inc."                  contact="Karen Ghavam @karenghavam-lunarg"/>
         <tag name="SAMSUNG"     author="Samsung Electronics Co., Ltd." contact="Alon Or-bach @alonorbach"/>
         <tag name="SEC"         author="Samsung Electronics Co., Ltd." contact="Alon Or-bach @alonorbach"/>
@@ -65,6 +66,7 @@ server.
         <tag name="EXT"         author="Multivendor"                   contact="Jon Leech @oddhack"/>
         <tag name="MESA"        author="Mesa open source project"      contact="Chad Versace @chadversary, Daniel Stone @fooishbar, David Airlie @airlied, Jason Ekstrand @jekstrand"/>
         <tag name="INTEL"       author="Intel Corporation"             contact="Slawek Grajewski @sgrajewski"/>
+        <tag name="HUAWEI"      author="Huawei Technologies Co. Ltd."  contact="Hueilong Wang @wyvernathuawei"/>
     </tags>
 
     <types comment="Vulkan type definitions">
@@ -77,6 +79,7 @@ server.
         <type category="include" name="wayland-client.h"/>
         <type category="include" name="windows.h"/>
         <type category="include" name="xcb/xcb.h"/>
+        <type category="include" name="directfb.h"/>
         <type category="include" name="zircon/types.h"/>
         <type category="include" name="ggp_c/vulkan_types.h"/>
             <comment>
@@ -112,6 +115,8 @@ server.
         <type requires="xcb/xcb.h" name="xcb_connection_t"/>
         <type requires="xcb/xcb.h" name="xcb_visualid_t"/>
         <type requires="xcb/xcb.h" name="xcb_window_t"/>
+        <type requires="directfb.h" name="IDirectFB"/>
+        <type requires="directfb.h" name="IDirectFBSurface"/>
         <type requires="zircon/types.h" name="zx_handle_t"/>
         <type requires="ggp_c/vulkan_types.h" name="GgpStreamDescriptor"/>
         <type requires="ggp_c/vulkan_types.h" name="GgpFrameToken"/>
@@ -131,7 +136,7 @@ server.
         <type category="define">// Vulkan 1.2 version number
 #define <name>VK_API_VERSION_1_2</name> <type>VK_MAKE_VERSION</type>(1, 2, 0)// Patch version should always be set to 0</type>
         <type category="define">// Version of this file
-#define <name>VK_HEADER_VERSION</name> 143</type>
+#define <name>VK_HEADER_VERSION</name> 163</type>
         <type category="define" requires="VK_HEADER_VERSION">// Complete version of this file
 #define <name>VK_HEADER_VERSION_COMPLETE</name> <type>VK_MAKE_VERSION</type>(1, 2, VK_HEADER_VERSION)</type>
 
@@ -214,6 +219,7 @@ typedef void <name>CAMetalLayer</name>;
         <type requires="VkPipelineCreateFlagBits"         category="bitmask">typedef <type>VkFlags</type> <name>VkPipelineCreateFlags</name>;</type>
         <type requires="VkColorComponentFlagBits"         category="bitmask">typedef <type>VkFlags</type> <name>VkColorComponentFlags</name>;</type>
         <type requires="VkFenceCreateFlagBits"            category="bitmask">typedef <type>VkFlags</type> <name>VkFenceCreateFlags</name>;</type>
+            <comment>When VkSemaphoreCreateFlagBits is first extended, need to add a requires= attribute for it to VkSemaphoreCreateFlags</comment>
         <type                                             category="bitmask">typedef <type>VkFlags</type> <name>VkSemaphoreCreateFlags</name>;</type>
         <type requires="VkFormatFeatureFlagBits"          category="bitmask">typedef <type>VkFlags</type> <name>VkFormatFeatureFlags</name>;</type>
         <type requires="VkQueryControlFlagBits"           category="bitmask">typedef <type>VkFlags</type> <name>VkQueryControlFlags</name>;</type>
@@ -248,6 +254,7 @@ typedef void <name>CAMetalLayer</name>;
         <type requires="VkBuildAccelerationStructureFlagBitsKHR" category="bitmask">typedef <type>VkFlags</type> <name>VkBuildAccelerationStructureFlagsKHR</name>;</type>
         <type                                             category="bitmask" name="VkBuildAccelerationStructureFlagsNV" alias="VkBuildAccelerationStructureFlagsKHR"/>
         <type requires="VkPrivateDataSlotCreateFlagBitsEXT" category="bitmask">typedef <type>VkFlags</type> <name>VkPrivateDataSlotCreateFlagsEXT</name>;</type>
+        <type requires="VkAccelerationStructureCreateFlagBitsKHR" category="bitmask">typedef <type>VkFlags</type> <name>VkAccelerationStructureCreateFlagsKHR</name>;</type>
         <type                                             category="bitmask">typedef <type>VkFlags</type> <name>VkDescriptorUpdateTemplateCreateFlags</name>;</type>
         <type                                             category="bitmask" name="VkDescriptorUpdateTemplateCreateFlagsKHR" alias="VkDescriptorUpdateTemplateCreateFlags"/>
         <type requires="VkPipelineCreationFeedbackFlagBitsEXT" category="bitmask">typedef <type>VkFlags</type> <name>VkPipelineCreationFeedbackFlagsEXT</name>;</type>
@@ -272,6 +279,7 @@ typedef void <name>CAMetalLayer</name>;
         <type                                             category="bitmask">typedef <type>VkFlags</type> <name>VkWin32SurfaceCreateFlagsKHR</name>;</type>
         <type                                             category="bitmask">typedef <type>VkFlags</type> <name>VkXlibSurfaceCreateFlagsKHR</name>;</type>
         <type                                             category="bitmask">typedef <type>VkFlags</type> <name>VkXcbSurfaceCreateFlagsKHR</name>;</type>
+        <type                                             category="bitmask">typedef <type>VkFlags</type> <name>VkDirectFBSurfaceCreateFlagsEXT</name>;</type>
         <type                                             category="bitmask">typedef <type>VkFlags</type> <name>VkIOSSurfaceCreateFlagsMVK</name>;</type>
         <type                                             category="bitmask">typedef <type>VkFlags</type> <name>VkMacOSSurfaceCreateFlagsMVK</name>;</type>
         <type                                             category="bitmask">typedef <type>VkFlags</type> <name>VkMetalSurfaceCreateFlagsEXT</name>;</type>
@@ -316,6 +324,7 @@ typedef void <name>CAMetalLayer</name>;
         <type requires="VkDebugUtilsMessageTypeFlagBitsEXT" category="bitmask">typedef <type>VkFlags</type> <name>VkDebugUtilsMessageTypeFlagsEXT</name>;</type>
         <type                                             category="bitmask">typedef <type>VkFlags</type> <name>VkDebugUtilsMessengerCreateFlagsEXT</name>;</type>
         <type                                             category="bitmask">typedef <type>VkFlags</type> <name>VkDebugUtilsMessengerCallbackDataFlagsEXT</name>;</type>
+        <type                                             category="bitmask">typedef <type>VkFlags</type> <name>VkDeviceMemoryReportFlagsEXT</name>;</type>
         <type                                             category="bitmask">typedef <type>VkFlags</type> <name>VkPipelineRasterizationConservativeStateCreateFlagsEXT</name>;</type>
         <type requires="VkDescriptorBindingFlagBits"      category="bitmask">typedef <type>VkFlags</type> <name>VkDescriptorBindingFlags</name>;</type>
         <type                                             category="bitmask" name="VkDescriptorBindingFlagsEXT"               alias="VkDescriptorBindingFlags"/>
@@ -329,49 +338,49 @@ typedef void <name>CAMetalLayer</name>;
 
             <comment>Types which can be void pointers or class pointers, selected at compile time</comment>
         <type category="handle"><type>VK_DEFINE_HANDLE</type>(<name>VkInstance</name>)</type>
-        <type category="handle" parent="VkInstance"><type>VK_DEFINE_HANDLE</type>(<name>VkPhysicalDevice</name>)</type>
-        <type category="handle" parent="VkPhysicalDevice"><type>VK_DEFINE_HANDLE</type>(<name>VkDevice</name>)</type>
-        <type category="handle" parent="VkDevice"><type>VK_DEFINE_HANDLE</type>(<name>VkQueue</name>)</type>
-        <type category="handle" parent="VkCommandPool"><type>VK_DEFINE_HANDLE</type>(<name>VkCommandBuffer</name>)</type>
-        <type category="handle" parent="VkDevice"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkDeviceMemory</name>)</type>
-        <type category="handle" parent="VkDevice"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkCommandPool</name>)</type>
-        <type category="handle" parent="VkDevice"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkBuffer</name>)</type>
-        <type category="handle" parent="VkDevice"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkBufferView</name>)</type>
-        <type category="handle" parent="VkDevice"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkImage</name>)</type>
-        <type category="handle" parent="VkDevice"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkImageView</name>)</type>
-        <type category="handle" parent="VkDevice"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkShaderModule</name>)</type>
-        <type category="handle" parent="VkDevice"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkPipeline</name>)</type>
-        <type category="handle" parent="VkDevice"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkPipelineLayout</name>)</type>
-        <type category="handle" parent="VkDevice"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkSampler</name>)</type>
-        <type category="handle" parent="VkDescriptorPool"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkDescriptorSet</name>)</type>
-        <type category="handle" parent="VkDevice"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkDescriptorSetLayout</name>)</type>
-        <type category="handle" parent="VkDevice"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkDescriptorPool</name>)</type>
-        <type category="handle" parent="VkDevice"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkFence</name>)</type>
-        <type category="handle" parent="VkDevice"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkSemaphore</name>)</type>
-        <type category="handle" parent="VkDevice"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkEvent</name>)</type>
-        <type category="handle" parent="VkDevice"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkQueryPool</name>)</type>
-        <type category="handle" parent="VkDevice"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkFramebuffer</name>)</type>
-        <type category="handle" parent="VkDevice"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkRenderPass</name>)</type>
-        <type category="handle" parent="VkDevice"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkPipelineCache</name>)</type>
-        <type category="handle" parent="VkDevice"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkIndirectCommandsLayoutNV</name>)</type>
-        <type category="handle" parent="VkDevice"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkDescriptorUpdateTemplate</name>)</type>
+        <type category="handle" parent="VkInstance"       objtypeenum="VK_OBJECT_TYPE_PHYSICAL_DEVICE"><type>VK_DEFINE_HANDLE</type>(<name>VkPhysicalDevice</name>)</type>
+        <type category="handle" parent="VkPhysicalDevice" objtypeenum="VK_OBJECT_TYPE_DEVICE"><type>VK_DEFINE_HANDLE</type>(<name>VkDevice</name>)</type>
+        <type category="handle" parent="VkDevice"         objtypeenum="VK_OBJECT_TYPE_QUEUE"><type>VK_DEFINE_HANDLE</type>(<name>VkQueue</name>)</type>
+        <type category="handle" parent="VkCommandPool"    objtypeenum="VK_OBJECT_TYPE_COMMAND_BUFFER"><type>VK_DEFINE_HANDLE</type>(<name>VkCommandBuffer</name>)</type>
+        <type category="handle" parent="VkDevice"         objtypeenum="VK_OBJECT_TYPE_DEVICE_MEMORY"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkDeviceMemory</name>)</type>
+        <type category="handle" parent="VkDevice"         objtypeenum="VK_OBJECT_TYPE_COMMAND_POOL"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkCommandPool</name>)</type>
+        <type category="handle" parent="VkDevice"         objtypeenum="VK_OBJECT_TYPE_BUFFER"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkBuffer</name>)</type>
+        <type category="handle" parent="VkDevice"         objtypeenum="VK_OBJECT_TYPE_BUFFER_VIEW"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkBufferView</name>)</type>
+        <type category="handle" parent="VkDevice"         objtypeenum="VK_OBJECT_TYPE_IMAGE"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkImage</name>)</type>
+        <type category="handle" parent="VkDevice"         objtypeenum="VK_OBJECT_TYPE_IMAGE_VIEW"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkImageView</name>)</type>
+        <type category="handle" parent="VkDevice"         objtypeenum="VK_OBJECT_TYPE_SHADER_MODULE"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkShaderModule</name>)</type>
+        <type category="handle" parent="VkDevice"         objtypeenum="VK_OBJECT_TYPE_PIPELINE"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkPipeline</name>)</type>
+        <type category="handle" parent="VkDevice"         objtypeenum="VK_OBJECT_TYPE_PIPELINE_LAYOUT"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkPipelineLayout</name>)</type>
+        <type category="handle" parent="VkDevice"         objtypeenum="VK_OBJECT_TYPE_SAMPLER"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkSampler</name>)</type>
+        <type category="handle" parent="VkDescriptorPool" objtypeenum="VK_OBJECT_TYPE_DESCRIPTOR_SET"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkDescriptorSet</name>)</type>
+        <type category="handle" parent="VkDevice"         objtypeenum="VK_OBJECT_TYPE_DESCRIPTOR_SET_LAYOUT"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkDescriptorSetLayout</name>)</type>
+        <type category="handle" parent="VkDevice"         objtypeenum="VK_OBJECT_TYPE_DESCRIPTOR_POOL"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkDescriptorPool</name>)</type>
+        <type category="handle" parent="VkDevice"         objtypeenum="VK_OBJECT_TYPE_FENCE"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkFence</name>)</type>
+        <type category="handle" parent="VkDevice"         objtypeenum="VK_OBJECT_TYPE_SEMAPHORE"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkSemaphore</name>)</type>
+        <type category="handle" parent="VkDevice"         objtypeenum="VK_OBJECT_TYPE_EVENT"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkEvent</name>)</type>
+        <type category="handle" parent="VkDevice"         objtypeenum="VK_OBJECT_TYPE_QUERY_POOL"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkQueryPool</name>)</type>
+        <type category="handle" parent="VkDevice"         objtypeenum="VK_OBJECT_TYPE_FRAMEBUFFER"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkFramebuffer</name>)</type>
+        <type category="handle" parent="VkDevice"         objtypeenum="VK_OBJECT_TYPE_RENDER_PASS"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkRenderPass</name>)</type>
+        <type category="handle" parent="VkDevice"         objtypeenum="VK_OBJECT_TYPE_PIPELINE_CACHE"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkPipelineCache</name>)</type>
+        <type category="handle" parent="VkDevice"         objtypeenum="VK_OBJECT_TYPE_INDIRECT_COMMANDS_LAYOUT_NV"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkIndirectCommandsLayoutNV</name>)</type>
+        <type category="handle" parent="VkDevice"         objtypeenum="VK_OBJECT_TYPE_DESCRIPTOR_UPDATE_TEMPLATE"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkDescriptorUpdateTemplate</name>)</type>
         <type category="handle" name="VkDescriptorUpdateTemplateKHR" alias="VkDescriptorUpdateTemplate"/>
-        <type category="handle" parent="VkDevice"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkSamplerYcbcrConversion</name>)</type>
+        <type category="handle" parent="VkDevice"         objtypeenum="VK_OBJECT_TYPE_SAMPLER_YCBCR_CONVERSION"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkSamplerYcbcrConversion</name>)</type>
         <type category="handle" name="VkSamplerYcbcrConversionKHR"   alias="VkSamplerYcbcrConversion"/>
-        <type category="handle" parent="VkDevice"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkValidationCacheEXT</name>)</type>
-        <type category="handle" parent="VkDevice"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkAccelerationStructureKHR</name>)</type>
-        <type category="handle" name="VkAccelerationStructureNV"     alias="VkAccelerationStructureKHR"/>
-        <type category="handle" parent="VkDevice"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkPerformanceConfigurationINTEL</name>)</type>
-        <type category="handle" parent="VkDevice"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkDeferredOperationKHR</name>)</type>
-        <type category="handle" parent="VkDevice"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkPrivateDataSlotEXT</name>)</type>
+        <type category="handle" parent="VkDevice"         objtypeenum="VK_OBJECT_TYPE_VALIDATION_CACHE_EXT"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkValidationCacheEXT</name>)</type>
+        <type category="handle" parent="VkDevice"         objtypeenum="VK_OBJECT_TYPE_ACCELERATION_STRUCTURE_KHR"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkAccelerationStructureKHR</name>)</type>
+        <type category="handle" parent="VkDevice"         objtypeenum="VK_OBJECT_TYPE_ACCELERATION_STRUCTURE_NV"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkAccelerationStructureNV</name>)</type>
+        <type category="handle" parent="VkDevice"         objtypeenum="VK_OBJECT_TYPE_PERFORMANCE_CONFIGURATION_INTEL"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkPerformanceConfigurationINTEL</name>)</type>
+        <type category="handle" parent="VkDevice"         objtypeenum="VK_OBJECT_TYPE_DEFERRED_OPERATION_KHR"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkDeferredOperationKHR</name>)</type>
+        <type category="handle" parent="VkDevice"         objtypeenum="VK_OBJECT_TYPE_PRIVATE_DATA_SLOT_EXT"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkPrivateDataSlotEXT</name>)</type>
 
             <comment>WSI extensions</comment>
-        <type category="handle" parent="VkPhysicalDevice"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkDisplayKHR</name>)</type>
-        <type category="handle" parent="VkDisplayKHR"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkDisplayModeKHR</name>)</type>
-        <type category="handle" parent="VkInstance"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkSurfaceKHR</name>)</type>
-        <type category="handle" parent="VkSurfaceKHR"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkSwapchainKHR</name>)</type>
-        <type category="handle" parent="VkInstance"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkDebugReportCallbackEXT</name>)</type>
-        <type category="handle" parent="VkInstance"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkDebugUtilsMessengerEXT</name>)</type>
+        <type category="handle" parent="VkPhysicalDevice" objtypeenum="VK_OBJECT_TYPE_DISPLAY_KHR"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkDisplayKHR</name>)</type>
+        <type category="handle" parent="VkDisplayKHR"     objtypeenum="VK_OBJECT_TYPE_DISPLAY_MODE_KHR"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkDisplayModeKHR</name>)</type>
+        <type category="handle" parent="VkInstance"       objtypeenum="VK_OBJECT_TYPE_SURFACE_KHR"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkSurfaceKHR</name>)</type>
+        <type category="handle" parent="VkSurfaceKHR"     objtypeenum="VK_OBJECT_TYPE_SWAPCHAIN_KHR"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkSwapchainKHR</name>)</type>
+        <type category="handle" parent="VkInstance"       objtypeenum="VK_OBJECT_TYPE_DEBUG_REPORT_CALLBACK_EXT"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkDebugReportCallbackEXT</name>)</type>
+        <type category="handle" parent="VkInstance"       objtypeenum="VK_OBJECT_TYPE_DEBUG_UTILS_MESSENGER_EXT"><type>VK_DEFINE_NON_DISPATCHABLE_HANDLE</type>(<name>VkDebugUtilsMessengerEXT</name>)</type>
 
             <comment>Types generated from corresponding enums tags below</comment>
         <type name="VkAttachmentLoadOp" category="enum"/>
@@ -451,6 +460,7 @@ typedef void <name>CAMetalLayer</name>;
         <type name="VkDescriptorPoolCreateFlagBits" category="enum"/>
         <type name="VkDependencyFlagBits" category="enum"/>
         <type name="VkObjectType" category="enum"/>
+            <comment>When VkSemaphoreCreateFlagBits is first extended, need to add a type enum tag for it here</comment>
 
         <comment>Extensions</comment>
         <type name="VkIndirectCommandsLayoutUsageFlagBitsNV" category="enum"/>
@@ -484,6 +494,8 @@ typedef void <name>CAMetalLayer</name>;
         <type category="enum" name="VkGeometryInstanceFlagBitsNV"                  alias="VkGeometryInstanceFlagBitsKHR"/>
         <type name="VkBuildAccelerationStructureFlagBitsKHR" category="enum"/>
         <type category="enum" name="VkBuildAccelerationStructureFlagBitsNV"        alias="VkBuildAccelerationStructureFlagBitsKHR"/>
+        <type name="VkAccelerationStructureCreateFlagBitsKHR" category="enum"/>
+        <type name="VkBuildAccelerationStructureModeKHR" category="enum"/>
         <type name="VkCopyAccelerationStructureModeKHR" category="enum"/>
         <type category="enum" name="VkCopyAccelerationStructureModeNV"             alias="VkCopyAccelerationStructureModeKHR"/>
         <type name="VkAccelerationStructureTypeKHR" category="enum"/>
@@ -492,9 +504,10 @@ typedef void <name>CAMetalLayer</name>;
         <type category="enum" name="VkGeometryTypeNV"                              alias="VkGeometryTypeKHR"/>
         <type name="VkRayTracingShaderGroupTypeKHR" category="enum"/>
         <type category="enum" name="VkRayTracingShaderGroupTypeNV"                 alias="VkRayTracingShaderGroupTypeKHR"/>
-        <type name="VkAccelerationStructureMemoryRequirementsTypeKHR" category="enum"/>
-        <type category="enum" name="VkAccelerationStructureMemoryRequirementsTypeNV" alias="VkAccelerationStructureMemoryRequirementsTypeKHR"/>
+        <type name="VkAccelerationStructureMemoryRequirementsTypeNV" category="enum"/>
         <type name="VkAccelerationStructureBuildTypeKHR" category="enum"/>
+        <type name="VkAccelerationStructureCompatibilityKHR" category="enum"/>
+        <type name="VkShaderGroupShaderKHR" category="enum"/>
         <type name="VkMemoryOverallocationBehaviorAMD" category="enum"/>
         <type name="VkScopeNV" category="enum"/>
         <type name="VkComponentTypeNV" category="enum"/>
@@ -517,6 +530,8 @@ typedef void <name>CAMetalLayer</name>;
         <type name="VkPipelineCompilerControlFlagBitsAMD" category="enum"/>
         <type name="VkShaderCorePropertiesFlagBitsAMD" category="enum"/>
         <type name="VkToolPurposeFlagBitsEXT" category="enum"/>
+        <type name="VkFragmentShadingRateNV" category="enum"/>
+        <type name="VkFragmentShadingRateTypeNV" category="enum"/>
 
             <comment>WSI extensions</comment>
         <type name="VkColorSpaceKHR" category="enum"/>
@@ -526,6 +541,7 @@ typedef void <name>CAMetalLayer</name>;
         <type name="VkSurfaceTransformFlagBitsKHR" category="enum"/>
         <type name="VkDebugReportFlagBitsEXT" category="enum"/>
         <type name="VkDebugReportObjectTypeEXT" category="enum"/>
+        <type name="VkDeviceMemoryReportEventTypeEXT" category="enum"/>
         <type name="VkRasterizationOrderAMD" category="enum"/>
         <type name="VkExternalMemoryHandleTypeFlagBitsNV" category="enum"/>
         <type name="VkExternalMemoryFeatureFlagBitsNV" category="enum"/>
@@ -576,6 +592,7 @@ typedef void <name>CAMetalLayer</name>;
         <type name="VkShaderFloatControlsIndependence" category="enum"/>
         <type category="enum" name="VkShaderFloatControlsIndependenceKHR"          alias="VkShaderFloatControlsIndependence"/>
         <type name="VkSwapchainImageUsageFlagBitsANDROID" category="enum"/>
+        <type name="VkFragmentShadingRateCombinerOpKHR" category="enum"/>
 
             <comment>Enumerated types in the header, but not used by the API</comment>
         <type name="VkVendorId" category="enum"/>
@@ -632,14 +649,19 @@ typedef void <name>CAMetalLayer</name>;
     const <type>VkDebugUtilsMessengerCallbackDataEXT</type>*      pCallbackData,
     <type>void</type>*                                            pUserData);</type>
 
+            <comment>The PFN_vkDeviceMemoryReportCallbackEXT type is used by the VK_EXT_device_memory_report extension</comment>
+        <type category="funcpointer" requires="VkDeviceMemoryReportCallbackDataEXT">typedef void (VKAPI_PTR *<name>PFN_vkDeviceMemoryReportCallbackEXT</name>)(
+    const <type>VkDeviceMemoryReportCallbackDataEXT</type>*  pCallbackData,
+    <type>void</type>*                                       pUserData);</type>
+
             <comment>Struct types</comment>
         <type category="struct" name="VkBaseOutStructure">
             <member><type>VkStructureType</type> <name>sType</name></member>
-            <member>struct <type>VkBaseOutStructure</type>* <name>pNext</name></member>
+            <member optional="true">struct <type>VkBaseOutStructure</type>* <name>pNext</name></member>
         </type>
         <type category="struct" name="VkBaseInStructure">
             <member><type>VkStructureType</type> <name>sType</name></member>
-            <member>const struct <type>VkBaseInStructure</type>* <name>pNext</name></member>
+            <member optional="true">const struct <type>VkBaseInStructure</type>* <name>pNext</name></member>
         </type>
         <type category="struct" name="VkOffset2D">
             <member><type>int32_t</type>        <name>x</name></member>
@@ -705,7 +727,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkApplicationInfo">
             <member values="VK_STRUCTURE_TYPE_APPLICATION_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*     <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*     <name>pNext</name></member>
             <member optional="true" len="null-terminated">const <type>char</type>*     <name>pApplicationName</name></member>
             <member><type>uint32_t</type>        <name>applicationVersion</name></member>
             <member optional="true" len="null-terminated">const <type>char</type>*     <name>pEngineName</name></member>
@@ -722,7 +744,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkDeviceQueueCreateInfo">
             <member values="VK_STRUCTURE_TYPE_DEVICE_QUEUE_CREATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*     <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*     <name>pNext</name></member>
             <member optional="true"><type>VkDeviceQueueCreateFlags</type>    <name>flags</name></member>
             <member><type>uint32_t</type>        <name>queueFamilyIndex</name></member>
             <member><type>uint32_t</type>        <name>queueCount</name></member>
@@ -730,7 +752,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_DEVICE_CREATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*     <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*     <name>pNext</name></member>
             <member optional="true"><type>VkDeviceCreateFlags</type>    <name>flags</name></member>
             <member><type>uint32_t</type>        <name>queueCreateInfoCount</name></member>
             <member len="queueCreateInfoCount">const <type>VkDeviceQueueCreateInfo</type>* <name>pQueueCreateInfos</name></member>
@@ -742,7 +764,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkInstanceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_INSTANCE_CREATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*     <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*     <name>pNext</name></member>
             <member optional="true"><type>VkInstanceCreateFlags</type>  <name>flags</name></member>
             <member optional="true">const <type>VkApplicationInfo</type>* <name>pApplicationInfo</name></member>
             <member optional="true"><type>uint32_t</type>               <name>enabledLayerCount</name></member>
@@ -764,7 +786,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkMemoryAllocateInfo">
             <member values="VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member><type>VkDeviceSize</type>           <name>allocationSize</name><comment>Size of memory allocation</comment></member>
             <member><type>uint32_t</type>               <name>memoryTypeIndex</name><comment>Index of the of the memory type to allocate from</comment></member>
         </type>
@@ -795,7 +817,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkMappedMemoryRange">
             <member values="VK_STRUCTURE_TYPE_MAPPED_MEMORY_RANGE"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member><type>VkDeviceMemory</type>         <name>memory</name><comment>Mapped memory object</comment></member>
             <member><type>VkDeviceSize</type>           <name>offset</name><comment>Offset within the memory object where the range starts</comment></member>
             <member><type>VkDeviceSize</type>           <name>size</name><comment>Size of the range within the memory object</comment></member>
@@ -824,7 +846,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkWriteDescriptorSet">
             <member values="VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member noautovalidity="true"><type>VkDescriptorSet</type>        <name>dstSet</name><comment>Destination descriptor set</comment></member>
             <member><type>uint32_t</type>               <name>dstBinding</name><comment>Binding within the destination descriptor set to write</comment></member>
             <member><type>uint32_t</type>               <name>dstArrayElement</name><comment>Array element within the destination binding to write</comment></member>
@@ -836,7 +858,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkCopyDescriptorSet">
             <member values="VK_STRUCTURE_TYPE_COPY_DESCRIPTOR_SET"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member><type>VkDescriptorSet</type>        <name>srcSet</name><comment>Source descriptor set</comment></member>
             <member><type>uint32_t</type>               <name>srcBinding</name><comment>Binding within the source descriptor set to copy from</comment></member>
             <member><type>uint32_t</type>               <name>srcArrayElement</name><comment>Array element within the source binding to copy from</comment></member>
@@ -847,7 +869,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkBufferCreateInfo">
             <member values="VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member optional="true"><type>VkBufferCreateFlags</type>    <name>flags</name><comment>Buffer creation flags</comment></member>
             <member><type>VkDeviceSize</type>           <name>size</name><comment>Specified in bytes</comment></member>
             <member><type>VkBufferUsageFlags</type>     <name>usage</name><comment>Buffer usage flags</comment></member>
@@ -857,7 +879,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkBufferViewCreateInfo">
             <member values="VK_STRUCTURE_TYPE_BUFFER_VIEW_CREATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member optional="true"><type>VkBufferViewCreateFlags</type><name>flags</name></member>
             <member><type>VkBuffer</type>               <name>buffer</name></member>
             <member><type>VkFormat</type>               <name>format</name><comment>Optionally specifies format of elements</comment></member>
@@ -884,13 +906,13 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkMemoryBarrier">
             <member values="VK_STRUCTURE_TYPE_MEMORY_BARRIER"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member optional="true"><type>VkAccessFlags</type>          <name>srcAccessMask</name><comment>Memory accesses from the source of the dependency to synchronize</comment></member>
             <member optional="true"><type>VkAccessFlags</type>          <name>dstAccessMask</name><comment>Memory accesses from the destination of the dependency to synchronize</comment></member>
         </type>
         <type category="struct" name="VkBufferMemoryBarrier">
             <member values="VK_STRUCTURE_TYPE_BUFFER_MEMORY_BARRIER"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member noautovalidity="true"><type>VkAccessFlags</type>          <name>srcAccessMask</name><comment>Memory accesses from the source of the dependency to synchronize</comment></member>
             <member noautovalidity="true"><type>VkAccessFlags</type>          <name>dstAccessMask</name><comment>Memory accesses from the destination of the dependency to synchronize</comment></member>
             <member><type>uint32_t</type>               <name>srcQueueFamilyIndex</name><comment>Queue family to transition ownership from</comment></member>
@@ -901,7 +923,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkImageMemoryBarrier">
             <member values="VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member noautovalidity="true"><type>VkAccessFlags</type>          <name>srcAccessMask</name><comment>Memory accesses from the source of the dependency to synchronize</comment></member>
             <member noautovalidity="true"><type>VkAccessFlags</type>          <name>dstAccessMask</name><comment>Memory accesses from the destination of the dependency to synchronize</comment></member>
             <member><type>VkImageLayout</type>          <name>oldLayout</name><comment>Current layout of the image</comment></member>
@@ -913,7 +935,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkImageCreateInfo">
             <member values="VK_STRUCTURE_TYPE_IMAGE_CREATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member optional="true"><type>VkImageCreateFlags</type>     <name>flags</name><comment>Image creation flags</comment></member>
             <member><type>VkImageType</type>            <name>imageType</name></member>
             <member><type>VkFormat</type>               <name>format</name></member>
@@ -937,7 +959,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkImageViewCreateInfo">
             <member values="VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member optional="true"><type>VkImageViewCreateFlags</type> <name>flags</name></member>
             <member><type>VkImage</type>                <name>image</name></member>
             <member><type>VkImageViewType</type>        <name>viewType</name></member>
@@ -982,7 +1004,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkBindSparseInfo">
             <member values="VK_STRUCTURE_TYPE_BIND_SPARSE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member optional="true"><type>uint32_t</type>               <name>waitSemaphoreCount</name></member>
             <member len="waitSemaphoreCount">const <type>VkSemaphore</type>*     <name>pWaitSemaphores</name></member>
             <member optional="true"><type>uint32_t</type>               <name>bufferBindCount</name></member>
@@ -1024,7 +1046,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkShaderModuleCreateInfo">
             <member values="VK_STRUCTURE_TYPE_SHADER_MODULE_CREATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member optional="true"><type>VkShaderModuleCreateFlags</type> <name>flags</name></member>
             <member><type>size_t</type>                 <name>codeSize</name><comment>Specified in bytes</comment></member>
             <member len="latexmath:[\textrm{codeSize} \over 4]" altlen="codeSize / 4">const <type>uint32_t</type>*            <name>pCode</name><comment>Binary code of size codeSize</comment></member>
@@ -1038,7 +1060,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkDescriptorSetLayoutCreateInfo">
             <member values="VK_STRUCTURE_TYPE_DESCRIPTOR_SET_LAYOUT_CREATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member optional="true"><type>VkDescriptorSetLayoutCreateFlags</type>    <name>flags</name></member>
             <member optional="true"><type>uint32_t</type>               <name>bindingCount</name><comment>Number of bindings in the descriptor set layout</comment></member>
             <member len="bindingCount">const <type>VkDescriptorSetLayoutBinding</type>* <name>pBindings</name><comment>Array of descriptor set layout bindings</comment></member>
@@ -1049,7 +1071,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkDescriptorPoolCreateInfo">
             <member values="VK_STRUCTURE_TYPE_DESCRIPTOR_POOL_CREATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member optional="true"><type>VkDescriptorPoolCreateFlags</type>  <name>flags</name></member>
             <member><type>uint32_t</type>               <name>maxSets</name></member>
             <member><type>uint32_t</type>               <name>poolSizeCount</name></member>
@@ -1057,7 +1079,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkDescriptorSetAllocateInfo">
             <member values="VK_STRUCTURE_TYPE_DESCRIPTOR_SET_ALLOCATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member><type>VkDescriptorPool</type>       <name>descriptorPool</name></member>
             <member><type>uint32_t</type>               <name>descriptorSetCount</name></member>
             <member len="descriptorSetCount">const <type>VkDescriptorSetLayout</type>* <name>pSetLayouts</name></member>
@@ -1075,7 +1097,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkPipelineShaderStageCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_CREATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member optional="true"><type>VkPipelineShaderStageCreateFlags</type>    <name>flags</name></member>
             <member><type>VkShaderStageFlagBits</type>  <name>stage</name><comment>Shader stage</comment></member>
             <member><type>VkShaderModule</type>         <name>module</name><comment>Module containing entry point</comment></member>
@@ -1084,7 +1106,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkComputePipelineCreateInfo">
             <member values="VK_STRUCTURE_TYPE_COMPUTE_PIPELINE_CREATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member optional="true"><type>VkPipelineCreateFlags</type>  <name>flags</name><comment>Pipeline creation flags</comment></member>
             <member><type>VkPipelineShaderStageCreateInfo</type> <name>stage</name></member>
             <member><type>VkPipelineLayout</type>       <name>layout</name><comment>Interface layout of the pipeline</comment></member>
@@ -1104,7 +1126,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkPipelineVertexInputStateCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PIPELINE_VERTEX_INPUT_STATE_CREATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member optional="true"><type>VkPipelineVertexInputStateCreateFlags</type>    <name>flags</name></member>
             <member optional="true"><type>uint32_t</type>               <name>vertexBindingDescriptionCount</name><comment>number of bindings</comment></member>
             <member len="vertexBindingDescriptionCount">const <type>VkVertexInputBindingDescription</type>* <name>pVertexBindingDescriptions</name></member>
@@ -1113,29 +1135,29 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkPipelineInputAssemblyStateCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PIPELINE_INPUT_ASSEMBLY_STATE_CREATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member optional="true"><type>VkPipelineInputAssemblyStateCreateFlags</type>    <name>flags</name></member>
             <member><type>VkPrimitiveTopology</type>    <name>topology</name></member>
             <member><type>VkBool32</type>               <name>primitiveRestartEnable</name></member>
         </type>
         <type category="struct" name="VkPipelineTessellationStateCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PIPELINE_TESSELLATION_STATE_CREATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member optional="true"><type>VkPipelineTessellationStateCreateFlags</type>    <name>flags</name></member>
             <member><type>uint32_t</type>               <name>patchControlPoints</name></member>
         </type>
         <type category="struct" name="VkPipelineViewportStateCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PIPELINE_VIEWPORT_STATE_CREATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member optional="true"><type>VkPipelineViewportStateCreateFlags</type>    <name>flags</name></member>
-            <member><type>uint32_t</type>               <name>viewportCount</name></member>
+            <member optional="true"><type>uint32_t</type>               <name>viewportCount</name></member>
             <member noautovalidity="true" optional="true" len="viewportCount">const <type>VkViewport</type>*      <name>pViewports</name></member>
-            <member><type>uint32_t</type>               <name>scissorCount</name></member>
+            <member optional="true"><type>uint32_t</type>               <name>scissorCount</name></member>
             <member noautovalidity="true" optional="true" len="scissorCount">const <type>VkRect2D</type>*        <name>pScissors</name></member>
         </type>
         <type category="struct" name="VkPipelineRasterizationStateCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PIPELINE_RASTERIZATION_STATE_CREATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>* <name>pNext</name></member>
+            <member optional="true">const <type>void</type>* <name>pNext</name></member>
             <member optional="true"><type>VkPipelineRasterizationStateCreateFlags</type>    <name>flags</name></member>
             <member><type>VkBool32</type>               <name>depthClampEnable</name></member>
             <member><type>VkBool32</type>               <name>rasterizerDiscardEnable</name></member>
@@ -1150,7 +1172,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkPipelineMultisampleStateCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PIPELINE_MULTISAMPLE_STATE_CREATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member optional="true"><type>VkPipelineMultisampleStateCreateFlags</type>    <name>flags</name></member>
             <member><type>VkSampleCountFlagBits</type>  <name>rasterizationSamples</name><comment>Number of samples used for rasterization</comment></member>
             <member><type>VkBool32</type>               <name>sampleShadingEnable</name><comment>optional (GL45)</comment></member>
@@ -1171,7 +1193,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkPipelineColorBlendStateCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PIPELINE_COLOR_BLEND_STATE_CREATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member optional="true"><type>VkPipelineColorBlendStateCreateFlags</type>    <name>flags</name></member>
             <member><type>VkBool32</type>               <name>logicOpEnable</name></member>
             <member noautovalidity="true"><type>VkLogicOp</type>              <name>logicOp</name></member>
@@ -1181,7 +1203,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkPipelineDynamicStateCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PIPELINE_DYNAMIC_STATE_CREATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member optional="true"><type>VkPipelineDynamicStateCreateFlags</type>    <name>flags</name></member>
             <member optional="true"><type>uint32_t</type>               <name>dynamicStateCount</name></member>
             <member len="dynamicStateCount">const <type>VkDynamicState</type>*  <name>pDynamicStates</name></member>
@@ -1197,7 +1219,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkPipelineDepthStencilStateCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PIPELINE_DEPTH_STENCIL_STATE_CREATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member optional="true"><type>VkPipelineDepthStencilStateCreateFlags</type>    <name>flags</name></member>
             <member><type>VkBool32</type>               <name>depthTestEnable</name></member>
             <member><type>VkBool32</type>               <name>depthWriteEnable</name></member>
@@ -1211,7 +1233,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkGraphicsPipelineCreateInfo">
             <member values="VK_STRUCTURE_TYPE_GRAPHICS_PIPELINE_CREATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member optional="true"><type>VkPipelineCreateFlags</type>  <name>flags</name><comment>Pipeline creation flags</comment></member>
             <member><type>uint32_t</type>               <name>stageCount</name></member>
             <member len="stageCount">const <type>VkPipelineShaderStageCreateInfo</type>* <name>pStages</name><comment>One entry for each active shader stage</comment></member>
@@ -1232,7 +1254,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkPipelineCacheCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PIPELINE_CACHE_CREATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member optional="true"><type>VkPipelineCacheCreateFlags</type>    <name>flags</name></member>
             <member optional="true"><type>size_t</type>                 <name>initialDataSize</name><comment>Size of initial data to populate cache, in bytes</comment></member>
             <member len="initialDataSize">const <type>void</type>*            <name>pInitialData</name><comment>Initial data to populate cache</comment></member>
@@ -1244,7 +1266,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkPipelineLayoutCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PIPELINE_LAYOUT_CREATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member optional="true"><type>VkPipelineLayoutCreateFlags</type>    <name>flags</name></member>
             <member optional="true"><type>uint32_t</type>               <name>setLayoutCount</name><comment>Number of descriptor sets interfaced by the pipeline</comment></member>
             <member len="setLayoutCount">const <type>VkDescriptorSetLayout</type>* <name>pSetLayouts</name><comment>Array of setCount number of descriptor set layout objects defining the layout of the</comment></member>
@@ -1253,7 +1275,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkSamplerCreateInfo">
             <member values="VK_STRUCTURE_TYPE_SAMPLER_CREATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member optional="true"><type>VkSamplerCreateFlags</type>   <name>flags</name></member>
             <member><type>VkFilter</type>               <name>magFilter</name><comment>Filter mode for magnification</comment></member>
             <member><type>VkFilter</type>               <name>minFilter</name><comment>Filter mode for minifiation</comment></member>
@@ -1273,20 +1295,20 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkCommandPoolCreateInfo">
             <member values="VK_STRUCTURE_TYPE_COMMAND_POOL_CREATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member optional="true"><type>VkCommandPoolCreateFlags</type>   <name>flags</name><comment>Command pool creation flags</comment></member>
             <member><type>uint32_t</type>               <name>queueFamilyIndex</name></member>
         </type>
         <type category="struct" name="VkCommandBufferAllocateInfo">
             <member values="VK_STRUCTURE_TYPE_COMMAND_BUFFER_ALLOCATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member><type>VkCommandPool</type>          <name>commandPool</name></member>
             <member><type>VkCommandBufferLevel</type>   <name>level</name></member>
             <member><type>uint32_t</type>               <name>commandBufferCount</name></member>
         </type>
         <type category="struct" name="VkCommandBufferInheritanceInfo">
             <member values="VK_STRUCTURE_TYPE_COMMAND_BUFFER_INHERITANCE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member optional="true" noautovalidity="true"><type>VkRenderPass</type>    <name>renderPass</name><comment>Render pass for secondary command buffers</comment></member>
             <member><type>uint32_t</type>               <name>subpass</name></member>
             <member optional="true" noautovalidity="true"><type>VkFramebuffer</type>   <name>framebuffer</name><comment>Framebuffer for secondary command buffers</comment></member>
@@ -1296,13 +1318,13 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkCommandBufferBeginInfo">
             <member values="VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member optional="true"><type>VkCommandBufferUsageFlags</type>  <name>flags</name><comment>Command buffer usage flags</comment></member>
             <member optional="true" noautovalidity="true">const <type>VkCommandBufferInheritanceInfo</type>*       <name>pInheritanceInfo</name><comment>Pointer to inheritance info for secondary command buffers</comment></member>
         </type>
         <type category="struct" name="VkRenderPassBeginInfo">
             <member values="VK_STRUCTURE_TYPE_RENDER_PASS_BEGIN_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member><type>VkRenderPass</type>           <name>renderPass</name></member>
             <member><type>VkFramebuffer</type>          <name>framebuffer</name></member>
             <member><type>VkRect2D</type>               <name>renderArea</name></member>
@@ -1365,7 +1387,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkRenderPassCreateInfo">
             <member values="VK_STRUCTURE_TYPE_RENDER_PASS_CREATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member optional="true"><type>VkRenderPassCreateFlags</type> <name>flags</name></member>
             <member optional="true"><type>uint32_t</type>   <name>attachmentCount</name></member>
             <member len="attachmentCount">const <type>VkAttachmentDescription</type>* <name>pAttachments</name></member>
@@ -1376,12 +1398,12 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkEventCreateInfo">
             <member values="VK_STRUCTURE_TYPE_EVENT_CREATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member optional="true"><type>VkEventCreateFlags</type>     <name>flags</name><comment>Event creation flags</comment></member>
         </type>
         <type category="struct" name="VkFenceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_FENCE_CREATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member optional="true"><type>VkFenceCreateFlags</type>     <name>flags</name><comment>Fence creation flags</comment></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceFeatures">
@@ -1567,12 +1589,12 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkSemaphoreCreateInfo">
             <member values="VK_STRUCTURE_TYPE_SEMAPHORE_CREATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member optional="true"><type>VkSemaphoreCreateFlags</type> <name>flags</name><comment>Semaphore creation flags</comment></member>
         </type>
         <type category="struct" name="VkQueryPoolCreateInfo">
             <member values="VK_STRUCTURE_TYPE_QUERY_POOL_CREATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member optional="true"><type>VkQueryPoolCreateFlags</type> <name>flags</name></member>
             <member><type>VkQueryType</type>            <name>queryType</name></member>
             <member><type>uint32_t</type>               <name>queryCount</name></member>
@@ -1580,7 +1602,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkFramebufferCreateInfo">
             <member values="VK_STRUCTURE_TYPE_FRAMEBUFFER_CREATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member optional="true"><type>VkFramebufferCreateFlags</type>    <name>flags</name></member>
             <member><type>VkRenderPass</type>           <name>renderPass</name></member>
             <member optional="true"><type>uint32_t</type>               <name>attachmentCount</name></member>
@@ -1609,7 +1631,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkSubmitInfo">
             <member values="VK_STRUCTURE_TYPE_SUBMIT_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>* <name>pNext</name></member>
+            <member optional="true">const <type>void</type>* <name>pNext</name></member>
             <member optional="true"><type>uint32_t</type>       <name>waitSemaphoreCount</name></member>
             <member len="waitSemaphoreCount">const <type>VkSemaphore</type>*     <name>pWaitSemaphores</name></member>
             <member len="waitSemaphoreCount">const <type>VkPipelineStageFlags</type>*           <name>pWaitDstStageMask</name></member>
@@ -1642,7 +1664,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkDisplayModeCreateInfoKHR">
             <member values="VK_STRUCTURE_TYPE_DISPLAY_MODE_CREATE_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member optional="true"><type>VkDisplayModeCreateFlagsKHR</type>      <name>flags</name></member>
             <member><type>VkDisplayModeParametersKHR</type>       <name>parameters</name><comment>The parameters this mode uses.</comment></member>
         </type>
@@ -1659,7 +1681,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkDisplaySurfaceCreateInfoKHR">
             <member values="VK_STRUCTURE_TYPE_DISPLAY_SURFACE_CREATE_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member optional="true"><type>VkDisplaySurfaceCreateFlagsKHR</type>   <name>flags</name></member>
             <member><type>VkDisplayModeKHR</type>                 <name>displayMode</name><comment>The mode to use when displaying this surface</comment></member>
             <member><type>uint32_t</type>                         <name>planeIndex</name><comment>The plane on which this surface appears.  Must be between 0 and the value returned by vkGetPhysicalDeviceDisplayPlanePropertiesKHR() in pPropertyCount.</comment></member>
@@ -1671,7 +1693,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkDisplayPresentInfoKHR" structextends="VkPresentInfoKHR">
             <member values="VK_STRUCTURE_TYPE_DISPLAY_PRESENT_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member><type>VkRect2D</type>                         <name>srcRect</name><comment>Rectangle within the presentable image to read pixel data from when presenting to the display.</comment></member>
             <member><type>VkRect2D</type>                         <name>dstRect</name><comment>Rectangle within the current display mode's visible region to display srcRectangle in.</comment></member>
             <member><type>VkBool32</type>                         <name>persistent</name><comment>For smart displays, use buffered mode.  If the display properties member "persistentMode" is VK_FALSE, this member must always be VK_FALSE.</comment></member>
@@ -1690,53 +1712,60 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkAndroidSurfaceCreateInfoKHR">
             <member values="VK_STRUCTURE_TYPE_ANDROID_SURFACE_CREATE_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                                    <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                                    <name>pNext</name></member>
             <member optional="true"><type>VkAndroidSurfaceCreateFlagsKHR</type> <name>flags</name></member>
             <member noautovalidity="true">struct <type>ANativeWindow</type>*    <name>window</name></member>
         </type>
         <type category="struct" name="VkViSurfaceCreateInfoNN">
             <member values="VK_STRUCTURE_TYPE_VI_SURFACE_CREATE_INFO_NN"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member optional="true"><type>VkViSurfaceCreateFlagsNN</type>   <name>flags</name></member>
             <member noautovalidity="true"><type>void</type>*                            <name>window</name></member>
         </type>
         <type category="struct" name="VkWaylandSurfaceCreateInfoKHR">
             <member values="VK_STRUCTURE_TYPE_WAYLAND_SURFACE_CREATE_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member optional="true"><type>VkWaylandSurfaceCreateFlagsKHR</type>   <name>flags</name></member>
             <member noautovalidity="true">struct <type>wl_display</type>*               <name>display</name></member>
             <member noautovalidity="true">struct <type>wl_surface</type>*               <name>surface</name></member>
         </type>
         <type category="struct" name="VkWin32SurfaceCreateInfoKHR">
             <member values="VK_STRUCTURE_TYPE_WIN32_SURFACE_CREATE_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member optional="true"><type>VkWin32SurfaceCreateFlagsKHR</type>   <name>flags</name></member>
             <member><type>HINSTANCE</type>                        <name>hinstance</name></member>
             <member><type>HWND</type>                             <name>hwnd</name></member>
         </type>
         <type category="struct" name="VkXlibSurfaceCreateInfoKHR">
             <member values="VK_STRUCTURE_TYPE_XLIB_SURFACE_CREATE_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member optional="true"><type>VkXlibSurfaceCreateFlagsKHR</type>   <name>flags</name></member>
             <member noautovalidity="true"><type>Display</type>*                         <name>dpy</name></member>
             <member><type>Window</type>                           <name>window</name></member>
         </type>
         <type category="struct" name="VkXcbSurfaceCreateInfoKHR">
             <member values="VK_STRUCTURE_TYPE_XCB_SURFACE_CREATE_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member optional="true"><type>VkXcbSurfaceCreateFlagsKHR</type>   <name>flags</name></member>
             <member noautovalidity="true"><type>xcb_connection_t</type>*                <name>connection</name></member>
             <member><type>xcb_window_t</type>                     <name>window</name></member>
         </type>
+        <type category="struct" name="VkDirectFBSurfaceCreateInfoEXT">
+            <member values="VK_STRUCTURE_TYPE_DIRECTFB_SURFACE_CREATE_INFO_EXT"><type>VkStructureType</type> <name>sType</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true"><type>VkDirectFBSurfaceCreateFlagsEXT</type>   <name>flags</name></member>
+            <member noautovalidity="true"><type>IDirectFB</type>*                       <name>dfb</name></member>
+            <member noautovalidity="true"><type>IDirectFBSurface</type>*                <name>surface</name></member>
+        </type>
         <type category="struct" name="VkImagePipeSurfaceCreateInfoFUCHSIA">
             <member values="VK_STRUCTURE_TYPE_IMAGEPIPE_SURFACE_CREATE_INFO_FUCHSIA"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member optional="true"><type>VkImagePipeSurfaceCreateFlagsFUCHSIA</type>   <name>flags</name></member>
             <member><type>zx_handle_t</type>                      <name>imagePipeHandle</name></member>
         </type>
         <type category="struct" name="VkStreamDescriptorSurfaceCreateInfoGGP">
             <member values="VK_STRUCTURE_TYPE_STREAM_DESCRIPTOR_SURFACE_CREATE_INFO_GGP"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member optional="true"><type>VkStreamDescriptorSurfaceCreateFlagsGGP</type> <name>flags</name></member>
             <member><type>GgpStreamDescriptor</type>              <name>streamDescriptor</name></member>
         </type>
@@ -1746,7 +1775,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkSwapchainCreateInfoKHR">
             <member values="VK_STRUCTURE_TYPE_SWAPCHAIN_CREATE_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member optional="true"><type>VkSwapchainCreateFlagsKHR</type>        <name>flags</name></member>
             <member><type>VkSurfaceKHR</type>                     <name>surface</name><comment>The swapchain's target surface</comment></member>
             <member><type>uint32_t</type>                         <name>minImageCount</name><comment>Minimum number of presentation images the application needs</comment></member>
@@ -1766,7 +1795,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkPresentInfoKHR">
             <member values="VK_STRUCTURE_TYPE_PRESENT_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*  <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*  <name>pNext</name></member>
             <member optional="true"><type>uint32_t</type>         <name>waitSemaphoreCount</name><comment>Number of semaphores to wait for before presenting</comment></member>
             <member len="waitSemaphoreCount">const <type>VkSemaphore</type>* <name>pWaitSemaphores</name><comment>Semaphores to wait for before presenting</comment></member>
             <member><type>uint32_t</type>                         <name>swapchainCount</name><comment>Number of swapchains to present in this call</comment></member>
@@ -1776,20 +1805,20 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkDebugReportCallbackCreateInfoEXT" structextends="VkInstanceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_DEBUG_REPORT_CALLBACK_CREATE_INFO_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member optional="true"><type>VkDebugReportFlagsEXT</type>            <name>flags</name><comment>Indicates which events call this callback</comment></member>
             <member><type>PFN_vkDebugReportCallbackEXT</type>     <name>pfnCallback</name><comment>Function pointer of a callback function</comment></member>
             <member optional="true"><type>void</type>*            <name>pUserData</name><comment>User data provided to callback function</comment></member>
         </type>
         <type category="struct" name="VkValidationFlagsEXT" structextends="VkInstanceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_VALIDATION_FLAGS_EXT"><type>VkStructureType</type>                  <name>sType</name><comment>Must be VK_STRUCTURE_TYPE_VALIDATION_FLAGS_EXT</comment></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member><type>uint32_t</type>                         <name>disabledValidationCheckCount</name><comment>Number of validation checks to disable</comment></member>
             <member len="disabledValidationCheckCount">const <type>VkValidationCheckEXT</type>* <name>pDisabledValidationChecks</name><comment>Validation checks to disable</comment></member>
         </type>
         <type category="struct" name="VkValidationFeaturesEXT" structextends="VkInstanceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_VALIDATION_FEATURES_EXT"><type>VkStructureType</type>  <name>sType</name><comment>Must be VK_STRUCTURE_TYPE_VALIDATION_FEATURES_EXT</comment></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member optional="true"><type>uint32_t</type>                         <name>enabledValidationFeatureCount</name><comment>Number of validation features to enable</comment></member>
             <member len="enabledValidationFeatureCount">const <type>VkValidationFeatureEnableEXT</type>* <name>pEnabledValidationFeatures</name><comment>Validation features to enable</comment></member>
             <member optional="true"><type>uint32_t</type>                         <name>disabledValidationFeatureCount</name><comment>Number of validation features to disable</comment></member>
@@ -1797,19 +1826,19 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkPipelineRasterizationStateRasterizationOrderAMD" structextends="VkPipelineRasterizationStateCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PIPELINE_RASTERIZATION_STATE_RASTERIZATION_ORDER_AMD"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member><type>VkRasterizationOrderAMD</type>          <name>rasterizationOrder</name><comment>Rasterization order to use for the pipeline</comment></member>
         </type>
         <type category="struct" name="VkDebugMarkerObjectNameInfoEXT">
             <member values="VK_STRUCTURE_TYPE_DEBUG_MARKER_OBJECT_NAME_INFO_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member><type>VkDebugReportObjectTypeEXT</type>       <name>objectType</name><comment>The type of the object</comment></member>
             <member><type>uint64_t</type>                         <name>object</name><comment>The handle of the object, cast to uint64_t</comment></member>
             <member len="null-terminated">const <type>char</type>* <name>pObjectName</name><comment>Name to apply to the object</comment></member>
         </type>
         <type category="struct" name="VkDebugMarkerObjectTagInfoEXT">
             <member values="VK_STRUCTURE_TYPE_DEBUG_MARKER_OBJECT_TAG_INFO_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member><type>VkDebugReportObjectTypeEXT</type>       <name>objectType</name><comment>The type of the object</comment></member>
             <member><type>uint64_t</type>                         <name>object</name><comment>The handle of the object, cast to uint64_t</comment></member>
             <member><type>uint64_t</type>                         <name>tagName</name><comment>The name of the tag to set on the object</comment></member>
@@ -1818,23 +1847,23 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkDebugMarkerMarkerInfoEXT">
             <member values="VK_STRUCTURE_TYPE_DEBUG_MARKER_MARKER_INFO_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member len="null-terminated">const <type>char</type>* <name>pMarkerName</name><comment>Name of the debug marker</comment></member>
             <member optional="true"><type>float</type>            <name>color</name>[4]<comment>Optional color for debug marker</comment></member>
         </type>
         <type category="struct" name="VkDedicatedAllocationImageCreateInfoNV" structextends="VkImageCreateInfo">
             <member values="VK_STRUCTURE_TYPE_DEDICATED_ALLOCATION_IMAGE_CREATE_INFO_NV"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member><type>VkBool32</type>                         <name>dedicatedAllocation</name><comment>Whether this image uses a dedicated allocation</comment></member>
         </type>
         <type category="struct" name="VkDedicatedAllocationBufferCreateInfoNV" structextends="VkBufferCreateInfo">
             <member values="VK_STRUCTURE_TYPE_DEDICATED_ALLOCATION_BUFFER_CREATE_INFO_NV"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member><type>VkBool32</type>                         <name>dedicatedAllocation</name><comment>Whether this buffer uses a dedicated allocation</comment></member>
         </type>
         <type category="struct" name="VkDedicatedAllocationMemoryAllocateInfoNV" structextends="VkMemoryAllocateInfo">
             <member values="VK_STRUCTURE_TYPE_DEDICATED_ALLOCATION_MEMORY_ALLOCATE_INFO_NV"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member optional="true"><type>VkImage</type>          <name>image</name><comment>Image that this allocation will be bound to</comment></member>
             <member optional="true"><type>VkBuffer</type>         <name>buffer</name><comment>Buffer that this allocation will be bound to</comment></member>
         </type>
@@ -1846,29 +1875,29 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkExternalMemoryImageCreateInfoNV" structextends="VkImageCreateInfo">
             <member values="VK_STRUCTURE_TYPE_EXTERNAL_MEMORY_IMAGE_CREATE_INFO_NV"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member optional="true"><type>VkExternalMemoryHandleTypeFlagsNV</type> <name>handleTypes</name></member>
         </type>
         <type category="struct" name="VkExportMemoryAllocateInfoNV" structextends="VkMemoryAllocateInfo">
             <member values="VK_STRUCTURE_TYPE_EXPORT_MEMORY_ALLOCATE_INFO_NV"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member optional="true"><type>VkExternalMemoryHandleTypeFlagsNV</type> <name>handleTypes</name></member>
         </type>
         <type category="struct" name="VkImportMemoryWin32HandleInfoNV" structextends="VkMemoryAllocateInfo">
             <member values="VK_STRUCTURE_TYPE_IMPORT_MEMORY_WIN32_HANDLE_INFO_NV"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member optional="true"><type>VkExternalMemoryHandleTypeFlagsNV</type> <name>handleType</name></member>
             <member optional="true"><type>HANDLE</type>                           <name>handle</name></member>
         </type>
         <type category="struct" name="VkExportMemoryWin32HandleInfoNV" structextends="VkMemoryAllocateInfo">
             <member values="VK_STRUCTURE_TYPE_EXPORT_MEMORY_WIN32_HANDLE_INFO_NV"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member optional="true">const <type>SECURITY_ATTRIBUTES</type>*       <name>pAttributes</name></member>
             <member optional="true"><type>DWORD</type>                            <name>dwAccess</name></member>
         </type>
         <type category="struct" name="VkWin32KeyedMutexAcquireReleaseInfoNV" structextends="VkSubmitInfo">
             <member values="VK_STRUCTURE_TYPE_WIN32_KEYED_MUTEX_ACQUIRE_RELEASE_INFO_NV"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member optional="true"><type>uint32_t</type>                         <name>acquireCount</name></member>
             <member len="acquireCount">const <type>VkDeviceMemory</type>*            <name>pAcquireSyncs</name></member>
             <member len="acquireCount">const <type>uint64_t</type>*                  <name>pAcquireKeys</name></member>
@@ -1879,27 +1908,27 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkPhysicalDeviceDeviceGeneratedCommandsFeaturesNV" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_DEVICE_GENERATED_COMMANDS_FEATURES_NV"><type>VkStructureType</type><name>sType</name></member>
-            <member noautovalidity="true"><type>void</type>*    <name>pNext</name></member>
+            <member optional="true"><type>void</type>*    <name>pNext</name></member>
             <member><type>VkBool32</type>                       <name>deviceGeneratedCommands</name></member>
         </type>
         <type category="struct" name="VkDevicePrivateDataCreateInfoEXT" allowduplicate="true" structextends="VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_DEVICE_PRIVATE_DATA_CREATE_INFO_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                            <name>pNext</name></member>
             <member><type>uint32_t</type>                               <name>privateDataSlotRequestCount</name></member>
         </type>
         <type category="struct" name="VkPrivateDataSlotCreateInfoEXT">
             <member values="VK_STRUCTURE_TYPE_PRIVATE_DATA_SLOT_CREATE_INFO_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                            <name>pNext</name></member>
             <member><type>VkPrivateDataSlotCreateFlagsEXT</type>        <name>flags</name></member>
         </type>
         <type category="struct" name="VkPhysicalDevicePrivateDataFeaturesEXT" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_PRIVATE_DATA_FEATURES_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                                  <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                                  <name>pNext</name></member>
             <member><type>VkBool32</type>                               <name>privateData</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceDeviceGeneratedCommandsPropertiesNV" structextends="VkPhysicalDeviceProperties2" returnedonly="true">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_DEVICE_GENERATED_COMMANDS_PROPERTIES_NV"><type>VkStructureType</type> <name>sType</name></member>
-            <member noautovalidity="true"><type>void</type>*    <name>pNext</name></member>
+            <member optional="true"><type>void</type>*    <name>pNext</name></member>
             <member><type>uint32_t</type>         <name>maxGraphicsShaderGroupCount</name></member>
             <member><type>uint32_t</type>         <name>maxIndirectSequenceCount</name></member>
             <member><type>uint32_t</type>         <name>maxIndirectCommandsTokenCount</name></member>
@@ -1912,7 +1941,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkGraphicsShaderGroupCreateInfoNV">
             <member values="VK_STRUCTURE_TYPE_GRAPHICS_SHADER_GROUP_CREATE_INFO_NV"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                                                <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                                                <name>pNext</name></member>
             <member><type>uint32_t</type>                                                   <name>stageCount</name></member>
             <member len="stageCount">const <type>VkPipelineShaderStageCreateInfo</type>*    <name>pStages</name></member>
             <member noautovalidity="true" optional="true">const <type>VkPipelineVertexInputStateCreateInfo</type>*                <name>pVertexInputState</name></member>
@@ -1920,7 +1949,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkGraphicsPipelineShaderGroupsCreateInfoNV" structextends="VkGraphicsPipelineCreateInfo">
             <member values="VK_STRUCTURE_TYPE_GRAPHICS_PIPELINE_SHADER_GROUPS_CREATE_INFO_NV"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                                                <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                                                <name>pNext</name></member>
             <member><type>uint32_t</type>                                                   <name>groupCount</name></member>
             <member len="groupCount">const <type>VkGraphicsShaderGroupCreateInfoNV</type>*  <name>pGroups</name></member>
             <member optional="true"><type>uint32_t</type>                                   <name>pipelineCount</name></member>
@@ -1948,7 +1977,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkIndirectCommandsLayoutTokenNV">
             <member values="VK_STRUCTURE_TYPE_INDIRECT_COMMANDS_LAYOUT_TOKEN_NV"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                    <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                    <name>pNext</name></member>
             <member><type>VkIndirectCommandsTokenTypeNV</type>  <name>tokenType</name></member>
             <member><type>uint32_t</type>                       <name>stream</name></member>
             <member><type>uint32_t</type>                       <name>offset</name></member>
@@ -1965,7 +1994,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkIndirectCommandsLayoutCreateInfoNV">
             <member values="VK_STRUCTURE_TYPE_INDIRECT_COMMANDS_LAYOUT_CREATE_INFO_NV"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                             <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                             <name>pNext</name></member>
             <member><type>VkIndirectCommandsLayoutUsageFlagsNV</type>    <name>flags</name></member>
             <member><type>VkPipelineBindPoint</type>                     <name>pipelineBindPoint</name></member>
             <member><type>uint32_t</type>                                <name>tokenCount</name></member>
@@ -1975,7 +2004,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkGeneratedCommandsInfoNV">
             <member values="VK_STRUCTURE_TYPE_GENERATED_COMMANDS_INFO_NV"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                        <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                        <name>pNext</name></member>
             <member><type>VkPipelineBindPoint</type>                <name>pipelineBindPoint</name></member>
             <member><type>VkPipeline</type>                         <name>pipeline</name></member>
             <member><type>VkIndirectCommandsLayoutNV</type>         <name>indirectCommandsLayout</name></member>
@@ -1992,7 +2021,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkGeneratedCommandsMemoryRequirementsInfoNV">
             <member values="VK_STRUCTURE_TYPE_GENERATED_COMMANDS_MEMORY_REQUIREMENTS_INFO_NV"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                 <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                 <name>pNext</name></member>
             <member><type>VkPipelineBindPoint</type>         <name>pipelineBindPoint</name></member>
             <member><type>VkPipeline</type>                  <name>pipeline</name></member>
             <member><type>VkIndirectCommandsLayoutNV</type>  <name>indirectCommandsLayout</name></member>
@@ -2000,31 +2029,31 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkPhysicalDeviceFeatures2" structextends="VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FEATURES_2"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                            <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                            <name>pNext</name></member>
             <member><type>VkPhysicalDeviceFeatures</type>         <name>features</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceFeatures2KHR"                            alias="VkPhysicalDeviceFeatures2"/>
         <type category="struct" name="VkPhysicalDeviceProperties2" returnedonly="true">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_PROPERTIES_2"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                            <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                            <name>pNext</name></member>
             <member><type>VkPhysicalDeviceProperties</type>       <name>properties</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceProperties2KHR"                          alias="VkPhysicalDeviceProperties2"/>
         <type category="struct" name="VkFormatProperties2" returnedonly="true">
             <member values="VK_STRUCTURE_TYPE_FORMAT_PROPERTIES_2"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                            <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                            <name>pNext</name></member>
             <member><type>VkFormatProperties</type>               <name>formatProperties</name></member>
         </type>
         <type category="struct" name="VkFormatProperties2KHR"                                  alias="VkFormatProperties2"/>
         <type category="struct" name="VkImageFormatProperties2" returnedonly="true">
             <member values="VK_STRUCTURE_TYPE_IMAGE_FORMAT_PROPERTIES_2"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>* <name>pNext</name></member>
+            <member optional="true"><type>void</type>* <name>pNext</name></member>
             <member><type>VkImageFormatProperties</type>          <name>imageFormatProperties</name></member>
         </type>
         <type category="struct" name="VkImageFormatProperties2KHR"                             alias="VkImageFormatProperties2"/>
         <type category="struct" name="VkPhysicalDeviceImageFormatInfo2">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_IMAGE_FORMAT_INFO_2"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>* <name>pNext</name></member>
+            <member optional="true">const <type>void</type>* <name>pNext</name></member>
             <member><type>VkFormat</type>                         <name>format</name></member>
             <member><type>VkImageType</type>                      <name>type</name></member>
             <member><type>VkImageTiling</type>                    <name>tiling</name></member>
@@ -2034,25 +2063,25 @@ typedef void <name>CAMetalLayer</name>;
         <type category="struct" name="VkPhysicalDeviceImageFormatInfo2KHR"                     alias="VkPhysicalDeviceImageFormatInfo2"/>
         <type category="struct" name="VkQueueFamilyProperties2" returnedonly="true">
             <member values="VK_STRUCTURE_TYPE_QUEUE_FAMILY_PROPERTIES_2"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                            <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                            <name>pNext</name></member>
             <member><type>VkQueueFamilyProperties</type>          <name>queueFamilyProperties</name></member>
         </type>
         <type category="struct" name="VkQueueFamilyProperties2KHR"                             alias="VkQueueFamilyProperties2"/>
         <type category="struct" name="VkPhysicalDeviceMemoryProperties2" returnedonly="true">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_MEMORY_PROPERTIES_2"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                            <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                            <name>pNext</name></member>
             <member><type>VkPhysicalDeviceMemoryProperties</type> <name>memoryProperties</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceMemoryProperties2KHR"                    alias="VkPhysicalDeviceMemoryProperties2"/>
         <type category="struct" name="VkSparseImageFormatProperties2" returnedonly="true">
             <member values="VK_STRUCTURE_TYPE_SPARSE_IMAGE_FORMAT_PROPERTIES_2"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                            <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                            <name>pNext</name></member>
             <member><type>VkSparseImageFormatProperties</type>    <name>properties</name></member>
         </type>
         <type category="struct" name="VkSparseImageFormatProperties2KHR"                       alias="VkSparseImageFormatProperties2"/>
         <type category="struct" name="VkPhysicalDeviceSparseImageFormatInfo2">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SPARSE_IMAGE_FORMAT_INFO_2"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member><type>VkFormat</type>                         <name>format</name></member>
             <member><type>VkImageType</type>                      <name>type</name></member>
             <member><type>VkSampleCountFlagBits</type>            <name>samples</name></member>
@@ -2062,7 +2091,7 @@ typedef void <name>CAMetalLayer</name>;
         <type category="struct" name="VkPhysicalDeviceSparseImageFormatInfo2KHR"               alias="VkPhysicalDeviceSparseImageFormatInfo2"/>
         <type category="struct" name="VkPhysicalDevicePushDescriptorPropertiesKHR" returnedonly="true" structextends="VkPhysicalDeviceProperties2">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_PUSH_DESCRIPTOR_PROPERTIES_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                            <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                            <name>pNext</name></member>
             <member><type>uint32_t</type>                         <name>maxPushDescriptors</name></member>
         </type>
         <type category="struct" name="VkConformanceVersion">
@@ -2074,7 +2103,7 @@ typedef void <name>CAMetalLayer</name>;
         <type category="struct" name="VkConformanceVersionKHR"                                 alias="VkConformanceVersion"/>
         <type category="struct" name="VkPhysicalDeviceDriverProperties" structextends="VkPhysicalDeviceProperties2" returnedonly="true">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_DRIVER_PROPERTIES"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                            <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                            <name>pNext</name></member>
             <member><type>VkDriverId</type>                       <name>driverID</name></member>
             <member><type>char</type>                             <name>driverName</name>[<enum>VK_MAX_DRIVER_NAME_SIZE</enum>]</member>
             <member><type>char</type>                             <name>driverInfo</name>[<enum>VK_MAX_DRIVER_INFO_SIZE</enum>]</member>
@@ -2083,7 +2112,7 @@ typedef void <name>CAMetalLayer</name>;
         <type category="struct" name="VkPhysicalDeviceDriverPropertiesKHR"                     alias="VkPhysicalDeviceDriverProperties"/>
         <type category="struct" name="VkPresentRegionsKHR" structextends="VkPresentInfoKHR">
             <member values="VK_STRUCTURE_TYPE_PRESENT_REGIONS_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member><type>uint32_t</type>                         <name>swapchainCount</name><comment>Copy of VkPresentInfoKHR::swapchainCount</comment></member>
             <member len="swapchainCount" optional="true">const <type>VkPresentRegionKHR</type>*   <name>pRegions</name><comment>The regions that have changed</comment></member>
         </type>
@@ -2098,7 +2127,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkPhysicalDeviceVariablePointersFeatures" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_VARIABLE_POINTERS_FEATURES"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                            <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                            <name>pNext</name></member>
             <member><type>VkBool32</type>                         <name>variablePointersStorageBuffer</name></member>
             <member><type>VkBool32</type>                         <name>variablePointers</name></member>
         </type>
@@ -2113,19 +2142,19 @@ typedef void <name>CAMetalLayer</name>;
         <type category="struct" name="VkExternalMemoryPropertiesKHR"                           alias="VkExternalMemoryProperties"/>
         <type category="struct" name="VkPhysicalDeviceExternalImageFormatInfo"  structextends="VkPhysicalDeviceImageFormatInfo2">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_EXTERNAL_IMAGE_FORMAT_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member optional="true"><type>VkExternalMemoryHandleTypeFlagBits</type> <name>handleType</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceExternalImageFormatInfoKHR"              alias="VkPhysicalDeviceExternalImageFormatInfo"/>
         <type category="struct" name="VkExternalImageFormatProperties" returnedonly="true" structextends="VkImageFormatProperties2">
             <member values="VK_STRUCTURE_TYPE_EXTERNAL_IMAGE_FORMAT_PROPERTIES"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                            <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                            <name>pNext</name></member>
             <member><type>VkExternalMemoryProperties</type> <name>externalMemoryProperties</name></member>
         </type>
         <type category="struct" name="VkExternalImageFormatPropertiesKHR"                      alias="VkExternalImageFormatProperties"/>
         <type category="struct" name="VkPhysicalDeviceExternalBufferInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_EXTERNAL_BUFFER_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member optional="true"><type>VkBufferCreateFlags</type> <name>flags</name></member>
             <member><type>VkBufferUsageFlags</type>               <name>usage</name></member>
             <member><type>VkExternalMemoryHandleTypeFlagBits</type> <name>handleType</name></member>
@@ -2133,13 +2162,13 @@ typedef void <name>CAMetalLayer</name>;
         <type category="struct" name="VkPhysicalDeviceExternalBufferInfoKHR"                   alias="VkPhysicalDeviceExternalBufferInfo"/>
         <type category="struct" name="VkExternalBufferProperties" returnedonly="true">
             <member values="VK_STRUCTURE_TYPE_EXTERNAL_BUFFER_PROPERTIES"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                            <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                            <name>pNext</name></member>
             <member><type>VkExternalMemoryProperties</type>    <name>externalMemoryProperties</name></member>
         </type>
         <type category="struct" name="VkExternalBufferPropertiesKHR"                           alias="VkExternalBufferProperties"/>
         <type category="struct" name="VkPhysicalDeviceIDProperties" returnedonly="true" structextends="VkPhysicalDeviceProperties2">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_ID_PROPERTIES"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                            <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                            <name>pNext</name></member>
             <member><type>uint8_t</type>                          <name>deviceUUID</name>[<enum>VK_UUID_SIZE</enum>]</member>
             <member><type>uint8_t</type>                          <name>driverUUID</name>[<enum>VK_UUID_SIZE</enum>]</member>
             <member><type>uint8_t</type>                          <name>deviceLUID</name>[<enum>VK_LUID_SIZE</enum>]</member>
@@ -2149,67 +2178,67 @@ typedef void <name>CAMetalLayer</name>;
         <type category="struct" name="VkPhysicalDeviceIDPropertiesKHR"                         alias="VkPhysicalDeviceIDProperties"/>
         <type category="struct" name="VkExternalMemoryImageCreateInfo" structextends="VkImageCreateInfo">
             <member values="VK_STRUCTURE_TYPE_EXTERNAL_MEMORY_IMAGE_CREATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
-            <member><type>VkExternalMemoryHandleTypeFlags</type> <name>handleTypes</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true"><type>VkExternalMemoryHandleTypeFlags</type> <name>handleTypes</name></member>
         </type>
         <type category="struct" name="VkExternalMemoryImageCreateInfoKHR"                      alias="VkExternalMemoryImageCreateInfo"/>
         <type category="struct" name="VkExternalMemoryBufferCreateInfo" structextends="VkBufferCreateInfo">
             <member values="VK_STRUCTURE_TYPE_EXTERNAL_MEMORY_BUFFER_CREATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member optional="true"><type>VkExternalMemoryHandleTypeFlags</type> <name>handleTypes</name></member>
         </type>
         <type category="struct" name="VkExternalMemoryBufferCreateInfoKHR"                     alias="VkExternalMemoryBufferCreateInfo"/>
         <type category="struct" name="VkExportMemoryAllocateInfo" structextends="VkMemoryAllocateInfo">
             <member values="VK_STRUCTURE_TYPE_EXPORT_MEMORY_ALLOCATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member optional="true"><type>VkExternalMemoryHandleTypeFlags</type> <name>handleTypes</name></member>
         </type>
         <type category="struct" name="VkExportMemoryAllocateInfoKHR"                           alias="VkExportMemoryAllocateInfo"/>
         <type category="struct" name="VkImportMemoryWin32HandleInfoKHR" structextends="VkMemoryAllocateInfo">
             <member values="VK_STRUCTURE_TYPE_IMPORT_MEMORY_WIN32_HANDLE_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member optional="true"><type>VkExternalMemoryHandleTypeFlagBits</type> <name>handleType</name></member>
             <member optional="true"><type>HANDLE</type>           <name>handle</name></member>
             <member optional="true"><type>LPCWSTR</type>          <name>name</name></member>
         </type>
         <type category="struct" name="VkExportMemoryWin32HandleInfoKHR" structextends="VkMemoryAllocateInfo">
             <member values="VK_STRUCTURE_TYPE_EXPORT_MEMORY_WIN32_HANDLE_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member optional="true">const <type>SECURITY_ATTRIBUTES</type>* <name>pAttributes</name></member>
             <member><type>DWORD</type>                            <name>dwAccess</name></member>
             <member><type>LPCWSTR</type>                          <name>name</name></member>
         </type>
         <type category="struct" name="VkMemoryWin32HandlePropertiesKHR" returnedonly="true">
             <member values="VK_STRUCTURE_TYPE_MEMORY_WIN32_HANDLE_PROPERTIES_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                            <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                            <name>pNext</name></member>
             <member><type>uint32_t</type>                         <name>memoryTypeBits</name></member>
         </type>
         <type category="struct" name="VkMemoryGetWin32HandleInfoKHR">
             <member values="VK_STRUCTURE_TYPE_MEMORY_GET_WIN32_HANDLE_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member><type>VkDeviceMemory</type>                   <name>memory</name></member>
             <member><type>VkExternalMemoryHandleTypeFlagBits</type> <name>handleType</name></member>
         </type>
         <type category="struct" name="VkImportMemoryFdInfoKHR" structextends="VkMemoryAllocateInfo">
             <member values="VK_STRUCTURE_TYPE_IMPORT_MEMORY_FD_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member optional="true"><type>VkExternalMemoryHandleTypeFlagBits</type> <name>handleType</name></member>
             <member><type>int</type>                              <name>fd</name></member>
         </type>
         <type category="struct" name="VkMemoryFdPropertiesKHR" returnedonly="true">
             <member values="VK_STRUCTURE_TYPE_MEMORY_FD_PROPERTIES_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                            <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                            <name>pNext</name></member>
             <member><type>uint32_t</type>                         <name>memoryTypeBits</name></member>
         </type>
         <type category="struct" name="VkMemoryGetFdInfoKHR">
             <member values="VK_STRUCTURE_TYPE_MEMORY_GET_FD_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member><type>VkDeviceMemory</type>                   <name>memory</name></member>
             <member><type>VkExternalMemoryHandleTypeFlagBits</type> <name>handleType</name></member>
         </type>
         <type category="struct" name="VkWin32KeyedMutexAcquireReleaseInfoKHR" structextends="VkSubmitInfo">
             <member values="VK_STRUCTURE_TYPE_WIN32_KEYED_MUTEX_ACQUIRE_RELEASE_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member optional="true"><type>uint32_t</type>         <name>acquireCount</name></member>
             <member len="acquireCount">const <type>VkDeviceMemory</type>* <name>pAcquireSyncs</name></member>
             <member len="acquireCount">const <type>uint64_t</type>* <name>pAcquireKeys</name></member>
@@ -2220,13 +2249,13 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkPhysicalDeviceExternalSemaphoreInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_EXTERNAL_SEMAPHORE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member><type>VkExternalSemaphoreHandleTypeFlagBits</type> <name>handleType</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceExternalSemaphoreInfoKHR"                alias="VkPhysicalDeviceExternalSemaphoreInfo"/>
         <type category="struct" name="VkExternalSemaphoreProperties" returnedonly="true">
             <member values="VK_STRUCTURE_TYPE_EXTERNAL_SEMAPHORE_PROPERTIES"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                            <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                            <name>pNext</name></member>
             <member><type>VkExternalSemaphoreHandleTypeFlags</type> <name>exportFromImportedHandleTypes</name></member>
             <member><type>VkExternalSemaphoreHandleTypeFlags</type> <name>compatibleHandleTypes</name></member>
             <member optional="true"><type>VkExternalSemaphoreFeatureFlags</type> <name>externalSemaphoreFeatures</name></member>
@@ -2234,13 +2263,13 @@ typedef void <name>CAMetalLayer</name>;
         <type category="struct" name="VkExternalSemaphorePropertiesKHR"                        alias="VkExternalSemaphoreProperties"/>
         <type category="struct" name="VkExportSemaphoreCreateInfo" structextends="VkSemaphoreCreateInfo">
             <member values="VK_STRUCTURE_TYPE_EXPORT_SEMAPHORE_CREATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member optional="true"><type>VkExternalSemaphoreHandleTypeFlags</type> <name>handleTypes</name></member>
         </type>
         <type category="struct" name="VkExportSemaphoreCreateInfoKHR"                          alias="VkExportSemaphoreCreateInfo"/>
         <type category="struct" name="VkImportSemaphoreWin32HandleInfoKHR">
             <member values="VK_STRUCTURE_TYPE_IMPORT_SEMAPHORE_WIN32_HANDLE_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member externsync="true"><type>VkSemaphore</type>    <name>semaphore</name></member>
             <member optional="true"><type>VkSemaphoreImportFlags</type> <name>flags</name></member>
             <member optional="true"><type>VkExternalSemaphoreHandleTypeFlagBits</type> <name>handleType</name></member>
@@ -2249,14 +2278,14 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkExportSemaphoreWin32HandleInfoKHR" structextends="VkSemaphoreCreateInfo">
             <member values="VK_STRUCTURE_TYPE_EXPORT_SEMAPHORE_WIN32_HANDLE_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member optional="true">const <type>SECURITY_ATTRIBUTES</type>*       <name>pAttributes</name></member>
             <member><type>DWORD</type>                            <name>dwAccess</name></member>
             <member><type>LPCWSTR</type>                          <name>name</name></member>
         </type>
         <type category="struct" name="VkD3D12FenceSubmitInfoKHR" structextends="VkSubmitInfo">
             <member values="VK_STRUCTURE_TYPE_D3D12_FENCE_SUBMIT_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member optional="true"><type>uint32_t</type>         <name>waitSemaphoreValuesCount</name></member>
             <member optional="true" len="waitSemaphoreValuesCount">const <type>uint64_t</type>* <name>pWaitSemaphoreValues</name></member>
             <member optional="true"><type>uint32_t</type>         <name>signalSemaphoreValuesCount</name></member>
@@ -2264,13 +2293,13 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkSemaphoreGetWin32HandleInfoKHR">
             <member values="VK_STRUCTURE_TYPE_SEMAPHORE_GET_WIN32_HANDLE_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member><type>VkSemaphore</type>                      <name>semaphore</name></member>
             <member><type>VkExternalSemaphoreHandleTypeFlagBits</type> <name>handleType</name></member>
         </type>
         <type category="struct" name="VkImportSemaphoreFdInfoKHR">
             <member values="VK_STRUCTURE_TYPE_IMPORT_SEMAPHORE_FD_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member externsync="true"><type>VkSemaphore</type>    <name>semaphore</name></member>
             <member optional="true"><type>VkSemaphoreImportFlags</type> <name>flags</name></member>
             <member><type>VkExternalSemaphoreHandleTypeFlagBits</type> <name>handleType</name></member>
@@ -2278,19 +2307,19 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkSemaphoreGetFdInfoKHR">
             <member values="VK_STRUCTURE_TYPE_SEMAPHORE_GET_FD_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member><type>VkSemaphore</type>                      <name>semaphore</name></member>
             <member><type>VkExternalSemaphoreHandleTypeFlagBits</type> <name>handleType</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceExternalFenceInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_EXTERNAL_FENCE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member><type>VkExternalFenceHandleTypeFlagBits</type> <name>handleType</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceExternalFenceInfoKHR"                    alias="VkPhysicalDeviceExternalFenceInfo"/>
         <type category="struct" name="VkExternalFenceProperties" returnedonly="true">
             <member values="VK_STRUCTURE_TYPE_EXTERNAL_FENCE_PROPERTIES"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                            <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                            <name>pNext</name></member>
             <member><type>VkExternalFenceHandleTypeFlags</type> <name>exportFromImportedHandleTypes</name></member>
             <member><type>VkExternalFenceHandleTypeFlags</type> <name>compatibleHandleTypes</name></member>
             <member optional="true"><type>VkExternalFenceFeatureFlags</type> <name>externalFenceFeatures</name></member>
@@ -2298,13 +2327,13 @@ typedef void <name>CAMetalLayer</name>;
         <type category="struct" name="VkExternalFencePropertiesKHR"                            alias="VkExternalFenceProperties"/>
         <type category="struct" name="VkExportFenceCreateInfo" structextends="VkFenceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_EXPORT_FENCE_CREATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member optional="true"><type>VkExternalFenceHandleTypeFlags</type> <name>handleTypes</name></member>
         </type>
         <type category="struct" name="VkExportFenceCreateInfoKHR"                              alias="VkExportFenceCreateInfo"/>
         <type category="struct" name="VkImportFenceWin32HandleInfoKHR">
             <member values="VK_STRUCTURE_TYPE_IMPORT_FENCE_WIN32_HANDLE_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                                        <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                                        <name>pNext</name></member>
             <member externsync="true"><type>VkFence</type>                          <name>fence</name></member>
             <member optional="true"><type>VkFenceImportFlags</type>              <name>flags</name></member>
             <member optional="true"><type>VkExternalFenceHandleTypeFlagBits</type>  <name>handleType</name></member>
@@ -2313,20 +2342,20 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkExportFenceWin32HandleInfoKHR" structextends="VkFenceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_EXPORT_FENCE_WIN32_HANDLE_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                                <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                                <name>pNext</name></member>
             <member optional="true">const <type>SECURITY_ATTRIBUTES</type>* <name>pAttributes</name></member>
             <member><type>DWORD</type>                                      <name>dwAccess</name></member>
             <member><type>LPCWSTR</type>                                    <name>name</name></member>
         </type>
         <type category="struct" name="VkFenceGetWin32HandleInfoKHR">
             <member values="VK_STRUCTURE_TYPE_FENCE_GET_WIN32_HANDLE_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                            <name>pNext</name></member>
             <member><type>VkFence</type>                                <name>fence</name></member>
             <member><type>VkExternalFenceHandleTypeFlagBits</type>   <name>handleType</name></member>
         </type>
         <type category="struct" name="VkImportFenceFdInfoKHR">
             <member values="VK_STRUCTURE_TYPE_IMPORT_FENCE_FD_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                            <name>pNext</name></member>
             <member externsync="true"><type>VkFence</type>              <name>fence</name></member>
             <member optional="true"><type>VkFenceImportFlags</type>  <name>flags</name></member>
             <member><type>VkExternalFenceHandleTypeFlagBits</type>   <name>handleType</name></member>
@@ -2334,13 +2363,13 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkFenceGetFdInfoKHR">
             <member values="VK_STRUCTURE_TYPE_FENCE_GET_FD_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                            <name>pNext</name></member>
             <member><type>VkFence</type>                                <name>fence</name></member>
             <member><type>VkExternalFenceHandleTypeFlagBits</type>   <name>handleType</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceMultiviewFeatures" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_MULTIVIEW_FEATURES"><type>VkStructureType</type> <name>sType</name></member>
-            <member noautovalidity="true"><type>void</type>*                            <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                            <name>pNext</name></member>
             <member><type>VkBool32</type>                         <name>multiview</name><comment>Multiple views in a renderpass</comment></member>
             <member><type>VkBool32</type>                         <name>multiviewGeometryShader</name><comment>Multiple views in a renderpass w/ geometry shader</comment></member>
             <member><type>VkBool32</type>                         <name>multiviewTessellationShader</name><comment>Multiple views in a renderpass w/ tessellation shader</comment></member>
@@ -2348,14 +2377,14 @@ typedef void <name>CAMetalLayer</name>;
         <type category="struct" name="VkPhysicalDeviceMultiviewFeaturesKHR"                    alias="VkPhysicalDeviceMultiviewFeatures"/>
         <type category="struct" name="VkPhysicalDeviceMultiviewProperties" returnedonly="true" structextends="VkPhysicalDeviceProperties2">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_MULTIVIEW_PROPERTIES"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                            <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                            <name>pNext</name></member>
             <member><type>uint32_t</type>                         <name>maxMultiviewViewCount</name><comment>max number of views in a subpass</comment></member>
             <member><type>uint32_t</type>                         <name>maxMultiviewInstanceIndex</name><comment>max instance index for a draw in a multiview subpass</comment></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceMultiviewPropertiesKHR"                  alias="VkPhysicalDeviceMultiviewProperties"/>
         <type category="struct" name="VkRenderPassMultiviewCreateInfo" structextends="VkRenderPassCreateInfo">
             <member values="VK_STRUCTURE_TYPE_RENDER_PASS_MULTIVIEW_CREATE_INFO"><type>VkStructureType</type>        <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member optional="true"><type>uint32_t</type>               <name>subpassCount</name></member>
             <member len="subpassCount">const <type>uint32_t</type>*     <name>pViewMasks</name></member>
             <member optional="true"><type>uint32_t</type>               <name>dependencyCount</name></member>
@@ -2366,7 +2395,7 @@ typedef void <name>CAMetalLayer</name>;
         <type category="struct" name="VkRenderPassMultiviewCreateInfoKHR"                      alias="VkRenderPassMultiviewCreateInfo"/>
         <type category="struct" name="VkSurfaceCapabilities2EXT" returnedonly="true">
             <member values="VK_STRUCTURE_TYPE_SURFACE_CAPABILITIES_2_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                            <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                            <name>pNext</name></member>
             <member><type>uint32_t</type>                         <name>minImageCount</name><comment>Supported minimum number of images for the surface</comment></member>
             <member><type>uint32_t</type>                         <name>maxImageCount</name><comment>Supported maximum number of images for the surface, 0 for unlimited</comment></member>
             <member><type>VkExtent2D</type>                       <name>currentExtent</name><comment>Current image width and height for the surface, (0, 0) if undefined</comment></member>
@@ -2381,27 +2410,27 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkDisplayPowerInfoEXT">
             <member values="VK_STRUCTURE_TYPE_DISPLAY_POWER_INFO_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member><type>VkDisplayPowerStateEXT</type>           <name>powerState</name></member>
         </type>
         <type category="struct" name="VkDeviceEventInfoEXT">
             <member values="VK_STRUCTURE_TYPE_DEVICE_EVENT_INFO_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member><type>VkDeviceEventTypeEXT</type>             <name>deviceEvent</name></member>
         </type>
         <type category="struct" name="VkDisplayEventInfoEXT">
             <member values="VK_STRUCTURE_TYPE_DISPLAY_EVENT_INFO_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member><type>VkDisplayEventTypeEXT</type>            <name>displayEvent</name></member>
         </type>
         <type category="struct" name="VkSwapchainCounterCreateInfoEXT" structextends="VkSwapchainCreateInfoKHR">
             <member values="VK_STRUCTURE_TYPE_SWAPCHAIN_COUNTER_CREATE_INFO_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member optional="true"><type>VkSurfaceCounterFlagsEXT</type>         <name>surfaceCounters</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceGroupProperties" returnedonly="true">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_GROUP_PROPERTIES"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                            <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                            <name>pNext</name></member>
             <member><type>uint32_t</type>                         <name>physicalDeviceCount</name></member>
             <member><type>VkPhysicalDevice</type>                 <name>physicalDevices</name>[<enum>VK_MAX_DEVICE_GROUP_SIZE</enum>]</member>
             <member><type>VkBool32</type>                         <name>subsetAllocation</name></member>
@@ -2409,14 +2438,14 @@ typedef void <name>CAMetalLayer</name>;
         <type category="struct" name="VkPhysicalDeviceGroupPropertiesKHR"                      alias="VkPhysicalDeviceGroupProperties"/>
         <type category="struct" name="VkMemoryAllocateFlagsInfo" structextends="VkMemoryAllocateInfo">
             <member values="VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_FLAGS_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member optional="true"><type>VkMemoryAllocateFlags</type> <name>flags</name></member>
             <member><type>uint32_t</type>                         <name>deviceMask</name></member>
         </type>
         <type category="struct" name="VkMemoryAllocateFlagsInfoKHR"                            alias="VkMemoryAllocateFlagsInfo"/>
         <type category="struct" name="VkBindBufferMemoryInfo">
             <member values="VK_STRUCTURE_TYPE_BIND_BUFFER_MEMORY_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member><type>VkBuffer</type>                         <name>buffer</name></member>
             <member><type>VkDeviceMemory</type>                   <name>memory</name></member>
             <member><type>VkDeviceSize</type>                     <name>memoryOffset</name></member>
@@ -2424,14 +2453,14 @@ typedef void <name>CAMetalLayer</name>;
         <type category="struct" name="VkBindBufferMemoryInfoKHR"                               alias="VkBindBufferMemoryInfo"/>
         <type category="struct" name="VkBindBufferMemoryDeviceGroupInfo" structextends="VkBindBufferMemoryInfo">
             <member values="VK_STRUCTURE_TYPE_BIND_BUFFER_MEMORY_DEVICE_GROUP_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member optional="true"><type>uint32_t</type>         <name>deviceIndexCount</name></member>
             <member len="deviceIndexCount">const <type>uint32_t</type>*  <name>pDeviceIndices</name></member>
         </type>
         <type category="struct" name="VkBindBufferMemoryDeviceGroupInfoKHR"                    alias="VkBindBufferMemoryDeviceGroupInfo"/>
         <type category="struct" name="VkBindImageMemoryInfo">
             <member values="VK_STRUCTURE_TYPE_BIND_IMAGE_MEMORY_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member><type>VkImage</type>                          <name>image</name></member>
             <member noautovalidity="true"><type>VkDeviceMemory</type>                   <name>memory</name></member>
             <member><type>VkDeviceSize</type>                     <name>memoryOffset</name></member>
@@ -2439,7 +2468,7 @@ typedef void <name>CAMetalLayer</name>;
         <type category="struct" name="VkBindImageMemoryInfoKHR"                                alias="VkBindImageMemoryInfo"/>
         <type category="struct" name="VkBindImageMemoryDeviceGroupInfo" structextends="VkBindImageMemoryInfo">
             <member values="VK_STRUCTURE_TYPE_BIND_IMAGE_MEMORY_DEVICE_GROUP_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member optional="true"><type>uint32_t</type>         <name>deviceIndexCount</name></member>
             <member len="deviceIndexCount">const <type>uint32_t</type>*  <name>pDeviceIndices</name></member>
             <member optional="true"><type>uint32_t</type>         <name>splitInstanceBindRegionCount</name></member>
@@ -2448,7 +2477,7 @@ typedef void <name>CAMetalLayer</name>;
         <type category="struct" name="VkBindImageMemoryDeviceGroupInfoKHR"                     alias="VkBindImageMemoryDeviceGroupInfo"/>
         <type category="struct" name="VkDeviceGroupRenderPassBeginInfo" structextends="VkRenderPassBeginInfo">
             <member values="VK_STRUCTURE_TYPE_DEVICE_GROUP_RENDER_PASS_BEGIN_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member><type>uint32_t</type>                         <name>deviceMask</name></member>
             <member optional="true"><type>uint32_t</type>         <name>deviceRenderAreaCount</name></member>
             <member len="deviceRenderAreaCount">const <type>VkRect2D</type>*  <name>pDeviceRenderAreas</name></member>
@@ -2456,13 +2485,13 @@ typedef void <name>CAMetalLayer</name>;
         <type category="struct" name="VkDeviceGroupRenderPassBeginInfoKHR"                     alias="VkDeviceGroupRenderPassBeginInfo"/>
         <type category="struct" name="VkDeviceGroupCommandBufferBeginInfo" structextends="VkCommandBufferBeginInfo">
             <member values="VK_STRUCTURE_TYPE_DEVICE_GROUP_COMMAND_BUFFER_BEGIN_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member><type>uint32_t</type>                         <name>deviceMask</name></member>
         </type>
         <type category="struct" name="VkDeviceGroupCommandBufferBeginInfoKHR"                  alias="VkDeviceGroupCommandBufferBeginInfo"/>
         <type category="struct" name="VkDeviceGroupSubmitInfo" structextends="VkSubmitInfo">
             <member values="VK_STRUCTURE_TYPE_DEVICE_GROUP_SUBMIT_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member optional="true"><type>uint32_t</type>         <name>waitSemaphoreCount</name></member>
             <member len="waitSemaphoreCount">const <type>uint32_t</type>*    <name>pWaitSemaphoreDeviceIndices</name></member>
             <member optional="true"><type>uint32_t</type>         <name>commandBufferCount</name></member>
@@ -2473,31 +2502,31 @@ typedef void <name>CAMetalLayer</name>;
         <type category="struct" name="VkDeviceGroupSubmitInfoKHR"                              alias="VkDeviceGroupSubmitInfo"/>
         <type category="struct" name="VkDeviceGroupBindSparseInfo" structextends="VkBindSparseInfo">
             <member values="VK_STRUCTURE_TYPE_DEVICE_GROUP_BIND_SPARSE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member><type>uint32_t</type>                         <name>resourceDeviceIndex</name></member>
             <member><type>uint32_t</type>                         <name>memoryDeviceIndex</name></member>
         </type>
         <type category="struct" name="VkDeviceGroupBindSparseInfoKHR"                          alias="VkDeviceGroupBindSparseInfo"/>
         <type category="struct" name="VkDeviceGroupPresentCapabilitiesKHR" returnedonly="true">
             <member values="VK_STRUCTURE_TYPE_DEVICE_GROUP_PRESENT_CAPABILITIES_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member><type>uint32_t</type>                         <name>presentMask</name>[<enum>VK_MAX_DEVICE_GROUP_SIZE</enum>]</member>
             <member><type>VkDeviceGroupPresentModeFlagsKHR</type> <name>modes</name></member>
         </type>
         <type category="struct" name="VkImageSwapchainCreateInfoKHR" structextends="VkImageCreateInfo">
             <member values="VK_STRUCTURE_TYPE_IMAGE_SWAPCHAIN_CREATE_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member optional="true"><type>VkSwapchainKHR</type>   <name>swapchain</name></member>
         </type>
         <type category="struct" name="VkBindImageMemorySwapchainInfoKHR" structextends="VkBindImageMemoryInfo">
             <member values="VK_STRUCTURE_TYPE_BIND_IMAGE_MEMORY_SWAPCHAIN_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member externsync="true"><type>VkSwapchainKHR</type> <name>swapchain</name></member>
             <member><type>uint32_t</type>                         <name>imageIndex</name></member>
         </type>
         <type category="struct" name="VkAcquireNextImageInfoKHR">
             <member values="VK_STRUCTURE_TYPE_ACQUIRE_NEXT_IMAGE_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member externsync="true"><type>VkSwapchainKHR</type> <name>swapchain</name></member>
             <member><type>uint64_t</type>                         <name>timeout</name></member>
             <member optional="true" externsync="true"><type>VkSemaphore</type> <name>semaphore</name></member>
@@ -2506,21 +2535,21 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkDeviceGroupPresentInfoKHR" structextends="VkPresentInfoKHR">
             <member values="VK_STRUCTURE_TYPE_DEVICE_GROUP_PRESENT_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member optional="true"><type>uint32_t</type>         <name>swapchainCount</name></member>
             <member len="swapchainCount">const <type>uint32_t</type>* <name>pDeviceMasks</name></member>
             <member><type>VkDeviceGroupPresentModeFlagBitsKHR</type> <name>mode</name></member>
         </type>
         <type category="struct" name="VkDeviceGroupDeviceCreateInfo" structextends="VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_DEVICE_GROUP_DEVICE_CREATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member optional="true"><type>uint32_t</type>                         <name>physicalDeviceCount</name></member>
             <member len="physicalDeviceCount">const <type>VkPhysicalDevice</type>*  <name>pPhysicalDevices</name></member>
         </type>
         <type category="struct" name="VkDeviceGroupDeviceCreateInfoKHR"                        alias="VkDeviceGroupDeviceCreateInfo"/>
         <type category="struct" name="VkDeviceGroupSwapchainCreateInfoKHR" structextends="VkSwapchainCreateInfoKHR">
             <member values="VK_STRUCTURE_TYPE_DEVICE_GROUP_SWAPCHAIN_CREATE_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member><type>VkDeviceGroupPresentModeFlagsKHR</type>                         <name>modes</name></member>
         </type>
         <type category="struct" name="VkDescriptorUpdateTemplateEntry">
@@ -2534,7 +2563,7 @@ typedef void <name>CAMetalLayer</name>;
         <type category="struct" name="VkDescriptorUpdateTemplateEntryKHR"                      alias="VkDescriptorUpdateTemplateEntry"/>
         <type category="struct" name="VkDescriptorUpdateTemplateCreateInfo">
             <member values="VK_STRUCTURE_TYPE_DESCRIPTOR_UPDATE_TEMPLATE_CREATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                               <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                               <name>pNext</name></member>
             <member optional="true"><type>VkDescriptorUpdateTemplateCreateFlags</type>    <name>flags</name></member>
             <member><type>uint32_t</type>                 <name>descriptorUpdateEntryCount</name><comment>Number of descriptor update entries to use for the update template</comment></member>
             <member len="descriptorUpdateEntryCount">const <type>VkDescriptorUpdateTemplateEntry</type>* <name>pDescriptorUpdateEntries</name><comment>Descriptor update entries for the template</comment></member>
@@ -2552,7 +2581,7 @@ typedef void <name>CAMetalLayer</name>;
         <type category="struct" name="VkHdrMetadataEXT">
                 <comment>Display primary in chromaticity coordinates</comment>
             <member values="VK_STRUCTURE_TYPE_HDR_METADATA_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*    <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*    <name>pNext</name></member>
                 <comment> From SMPTE 2086</comment>
             <member noautovalidity="true"><type>VkXYColorEXT</type>   <name>displayPrimaryRed</name><comment>Display primary's Red</comment></member>
             <member noautovalidity="true"><type>VkXYColorEXT</type>   <name>displayPrimaryGreen</name><comment>Display primary's Green</comment></member>
@@ -2566,12 +2595,12 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkDisplayNativeHdrSurfaceCapabilitiesAMD" returnedonly="true" structextends="VkSurfaceCapabilities2KHR">
             <member values="VK_STRUCTURE_TYPE_DISPLAY_NATIVE_HDR_SURFACE_CAPABILITIES_AMD"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*          <name>pNext</name></member>
+            <member optional="true"><type>void</type>*          <name>pNext</name></member>
             <member><type>VkBool32</type>       <name>localDimmingSupport</name></member>
         </type>
         <type category="struct" name="VkSwapchainDisplayNativeHdrCreateInfoAMD" structextends="VkSwapchainCreateInfoKHR">
             <member values="VK_STRUCTURE_TYPE_SWAPCHAIN_DISPLAY_NATIVE_HDR_CREATE_INFO_AMD"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*    <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*    <name>pNext</name></member>
             <member><type>VkBool32</type>       <name>localDimmingEnable</name></member>
         </type>
         <type category="struct" name="VkRefreshCycleDurationGOOGLE" returnedonly="true">
@@ -2586,7 +2615,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkPresentTimesInfoGOOGLE" structextends="VkPresentInfoKHR">
             <member values="VK_STRUCTURE_TYPE_PRESENT_TIMES_INFO_GOOGLE"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member><type>uint32_t</type>                         <name>swapchainCount</name><comment>Copy of VkPresentInfoKHR::swapchainCount</comment></member>
             <member len="swapchainCount" optional="true">const <type>VkPresentTimeGOOGLE</type>*   <name>pTimes</name><comment>The earliest times to present images</comment></member>
         </type>
@@ -2596,19 +2625,19 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkIOSSurfaceCreateInfoMVK">
             <member values="VK_STRUCTURE_TYPE_IOS_SURFACE_CREATE_INFO_MVK"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                                    <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                                    <name>pNext</name></member>
             <member optional="true"><type>VkIOSSurfaceCreateFlagsMVK</type>     <name>flags</name></member>
             <member noautovalidity="true">const <type>void</type>*                                    <name>pView</name></member>
         </type>
         <type category="struct" name="VkMacOSSurfaceCreateInfoMVK">
             <member values="VK_STRUCTURE_TYPE_MACOS_SURFACE_CREATE_INFO_MVK"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                                    <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                                    <name>pNext</name></member>
             <member optional="true"><type>VkMacOSSurfaceCreateFlagsMVK</type>   <name>flags</name></member>
             <member noautovalidity="true">const <type>void</type>*                                    <name>pView</name></member>
         </type>
         <type category="struct" name="VkMetalSurfaceCreateInfoEXT">
             <member values="VK_STRUCTURE_TYPE_METAL_SURFACE_CREATE_INFO_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                                    <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                                    <name>pNext</name></member>
             <member optional="true"><type>VkMetalSurfaceCreateFlagsEXT</type>   <name>flags</name></member>
             <member noautovalidity="true">const <type>CAMetalLayer</type>*      <name>pLayer</name></member>
         </type>
@@ -2618,7 +2647,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkPipelineViewportWScalingStateCreateInfoNV" structextends="VkPipelineViewportStateCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PIPELINE_VIEWPORT_W_SCALING_STATE_CREATE_INFO_NV"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member><type>VkBool32</type>               <name>viewportWScalingEnable</name></member>
             <member><type>uint32_t</type>               <name>viewportCount</name></member>
             <member noautovalidity="true" optional="true" len="viewportCount">const <type>VkViewportWScalingNV</type>*      <name>pViewportWScalings</name></member>
@@ -2631,19 +2660,19 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkPipelineViewportSwizzleStateCreateInfoNV" structextends="VkPipelineViewportStateCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PIPELINE_VIEWPORT_SWIZZLE_STATE_CREATE_INFO_NV"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member optional="true"><type>VkPipelineViewportSwizzleStateCreateFlagsNV</type>    <name>flags</name></member>
             <member><type>uint32_t</type>               <name>viewportCount</name></member>
             <member len="viewportCount">const <type>VkViewportSwizzleNV</type>*      <name>pViewportSwizzles</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceDiscardRectanglePropertiesEXT" returnedonly="true" structextends="VkPhysicalDeviceProperties2">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_DISCARD_RECTANGLE_PROPERTIES_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                  <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                  <name>pNext</name></member>
             <member><type>uint32_t</type>               <name>maxDiscardRectangles</name><comment>max number of active discard rectangles</comment></member>
         </type>
         <type category="struct" name="VkPipelineDiscardRectangleStateCreateInfoEXT" structextends="VkGraphicsPipelineCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PIPELINE_DISCARD_RECTANGLE_STATE_CREATE_INFO_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                                                       <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                                                       <name>pNext</name></member>
             <member optional="true"><type>VkPipelineDiscardRectangleStateCreateFlagsEXT</type>     <name>flags</name></member>
             <member><type>VkDiscardRectangleModeEXT</type>                                         <name>discardRectangleMode</name></member>
             <member optional="true"><type>uint32_t</type>                                          <name>discardRectangleCount</name></member>
@@ -2651,7 +2680,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkPhysicalDeviceMultiviewPerViewAttributesPropertiesNVX" returnedonly="true" structextends="VkPhysicalDeviceProperties2">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_MULTIVIEW_PER_VIEW_ATTRIBUTES_PROPERTIES_NVX"><type>VkStructureType</type> <name>sType</name></member>
-            <member noautovalidity="true"><type>void</type>*                            <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                            <name>pNext</name></member>
             <member><type>VkBool32</type>                         <name>perViewPositionAllComponents</name></member>
         </type>
         <type category="struct" name="VkInputAttachmentAspectReference">
@@ -2662,60 +2691,60 @@ typedef void <name>CAMetalLayer</name>;
         <type category="struct" name="VkInputAttachmentAspectReferenceKHR"                     alias="VkInputAttachmentAspectReference"/>
         <type category="struct" name="VkRenderPassInputAttachmentAspectCreateInfo" structextends="VkRenderPassCreateInfo">
             <member values="VK_STRUCTURE_TYPE_RENDER_PASS_INPUT_ATTACHMENT_ASPECT_CREATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                     <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                     <name>pNext</name></member>
             <member><type>uint32_t</type>                        <name>aspectReferenceCount</name></member>
             <member len="aspectReferenceCount">const <type>VkInputAttachmentAspectReference</type>* <name>pAspectReferences</name></member>
         </type>
         <type category="struct" name="VkRenderPassInputAttachmentAspectCreateInfoKHR"          alias="VkRenderPassInputAttachmentAspectCreateInfo"/>
         <type category="struct" name="VkPhysicalDeviceSurfaceInfo2KHR">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SURFACE_INFO_2_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>* <name>pNext</name></member>
+            <member optional="true">const <type>void</type>* <name>pNext</name></member>
             <member><type>VkSurfaceKHR</type> <name>surface</name></member>
         </type>
         <type category="struct" name="VkSurfaceCapabilities2KHR" returnedonly="true">
             <member values="VK_STRUCTURE_TYPE_SURFACE_CAPABILITIES_2_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*   <name>pNext</name></member>
+            <member optional="true"><type>void</type>*   <name>pNext</name></member>
             <member><type>VkSurfaceCapabilitiesKHR</type> <name>surfaceCapabilities</name></member>
         </type>
         <type category="struct" name="VkSurfaceFormat2KHR" returnedonly="true">
             <member values="VK_STRUCTURE_TYPE_SURFACE_FORMAT_2_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>* <name>pNext</name></member>
+            <member optional="true"><type>void</type>* <name>pNext</name></member>
             <member><type>VkSurfaceFormatKHR</type> <name>surfaceFormat</name></member>
         </type>
         <type category="struct" name="VkDisplayProperties2KHR" returnedonly="true">
             <member values="VK_STRUCTURE_TYPE_DISPLAY_PROPERTIES_2_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>* <name>pNext</name></member>
+            <member optional="true"><type>void</type>* <name>pNext</name></member>
             <member><type>VkDisplayPropertiesKHR</type> <name>displayProperties</name></member>
         </type>
         <type category="struct" name="VkDisplayPlaneProperties2KHR" returnedonly="true">
             <member values="VK_STRUCTURE_TYPE_DISPLAY_PLANE_PROPERTIES_2_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>* <name>pNext</name></member>
+            <member optional="true"><type>void</type>* <name>pNext</name></member>
             <member><type>VkDisplayPlanePropertiesKHR</type> <name>displayPlaneProperties</name></member>
         </type>
         <type category="struct" name="VkDisplayModeProperties2KHR" returnedonly="true">
             <member values="VK_STRUCTURE_TYPE_DISPLAY_MODE_PROPERTIES_2_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>* <name>pNext</name></member>
+            <member optional="true"><type>void</type>* <name>pNext</name></member>
             <member><type>VkDisplayModePropertiesKHR</type> <name>displayModeProperties</name></member>
         </type>
         <type category="struct" name="VkDisplayPlaneInfo2KHR">
             <member values="VK_STRUCTURE_TYPE_DISPLAY_PLANE_INFO_2_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>* <name>pNext</name></member>
+            <member optional="true">const <type>void</type>* <name>pNext</name></member>
             <member externsync="true"><type>VkDisplayModeKHR</type> <name>mode</name></member>
             <member><type>uint32_t</type> <name>planeIndex</name></member>
         </type>
         <type category="struct" name="VkDisplayPlaneCapabilities2KHR" returnedonly="true">
             <member values="VK_STRUCTURE_TYPE_DISPLAY_PLANE_CAPABILITIES_2_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>* <name>pNext</name></member>
+            <member optional="true"><type>void</type>* <name>pNext</name></member>
             <member><type>VkDisplayPlaneCapabilitiesKHR</type> <name>capabilities</name></member>
         </type>
         <type category="struct" name="VkSharedPresentSurfaceCapabilitiesKHR" returnedonly="true" structextends="VkSurfaceCapabilities2KHR">
             <member values="VK_STRUCTURE_TYPE_SHARED_PRESENT_SURFACE_CAPABILITIES_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member noautovalidity="true"><type>void</type>*                            <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                            <name>pNext</name></member>
             <member optional="true"><type>VkImageUsageFlags</type> <name>sharedPresentSupportedUsageFlags</name><comment>Supported image usage flags if swapchain created using a shared present mode</comment></member>
         </type>
         <type category="struct" name="VkPhysicalDevice16BitStorageFeatures" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_16BIT_STORAGE_FEATURES"><type>VkStructureType</type> <name>sType</name></member>
-            <member noautovalidity="true"><type>void</type>*      <name>pNext</name></member>
+            <member optional="true"><type>void</type>*      <name>pNext</name></member>
             <member><type>VkBool32</type>                         <name>storageBuffer16BitAccess</name><comment>16-bit integer/floating-point variables supported in BufferBlock</comment></member>
             <member><type>VkBool32</type>                         <name>uniformAndStorageBuffer16BitAccess</name><comment>16-bit integer/floating-point variables supported in BufferBlock and Block</comment></member>
             <member><type>VkBool32</type>                         <name>storagePushConstant16</name><comment>16-bit integer/floating-point variables supported in PushConstant</comment></member>
@@ -2724,89 +2753,89 @@ typedef void <name>CAMetalLayer</name>;
         <type category="struct" name="VkPhysicalDevice16BitStorageFeaturesKHR"                 alias="VkPhysicalDevice16BitStorageFeatures"/>
         <type category="struct" name="VkPhysicalDeviceSubgroupProperties" returnedonly="true" structextends="VkPhysicalDeviceProperties2">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SUBGROUP_PROPERTIES"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                   <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                   <name>pNext</name></member>
             <member noautovalidity="true"><type>uint32_t</type>                      <name>subgroupSize</name><comment>The size of a subgroup for this queue.</comment></member>
             <member noautovalidity="true"><type>VkShaderStageFlags</type>            <name>supportedStages</name><comment>Bitfield of what shader stages support subgroup operations</comment></member>
             <member noautovalidity="true"><type>VkSubgroupFeatureFlags</type>        <name>supportedOperations</name><comment>Bitfield of what subgroup operations are supported.</comment></member>
             <member noautovalidity="true"><type>VkBool32</type> <name>quadOperationsInAllStages</name><comment>Flag to specify whether quad operations are available in all stages.</comment></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceShaderSubgroupExtendedTypesFeatures" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
-             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SHADER_SUBGROUP_EXTENDED_TYPES_FEATURES"><type>VkStructureType</type> <name>sType</name></member>
-             <member><type>void</type>*                          <name>pNext</name></member>
-             <member noautovalidity="true"><type>VkBool32</type> <name>shaderSubgroupExtendedTypes</name><comment>Flag to specify whether subgroup operations with extended types are supported</comment></member>
+            <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SHADER_SUBGROUP_EXTENDED_TYPES_FEATURES"><type>VkStructureType</type> <name>sType</name></member>
+            <member optional="true"><type>void</type>*                          <name>pNext</name></member>
+            <member noautovalidity="true"><type>VkBool32</type> <name>shaderSubgroupExtendedTypes</name><comment>Flag to specify whether subgroup operations with extended types are supported</comment></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceShaderSubgroupExtendedTypesFeaturesKHR"  alias="VkPhysicalDeviceShaderSubgroupExtendedTypesFeatures"/>
         <type category="struct" name="VkBufferMemoryRequirementsInfo2">
             <member values="VK_STRUCTURE_TYPE_BUFFER_MEMORY_REQUIREMENTS_INFO_2"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                                                          <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                                                          <name>pNext</name></member>
             <member><type>VkBuffer</type>                                                             <name>buffer</name></member>
         </type>
         <type category="struct" name="VkBufferMemoryRequirementsInfo2KHR"                      alias="VkBufferMemoryRequirementsInfo2"/>
         <type category="struct" name="VkImageMemoryRequirementsInfo2">
             <member values="VK_STRUCTURE_TYPE_IMAGE_MEMORY_REQUIREMENTS_INFO_2"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                                                          <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                                                          <name>pNext</name></member>
             <member><type>VkImage</type>                                                              <name>image</name></member>
         </type>
         <type category="struct" name="VkImageMemoryRequirementsInfo2KHR"                       alias="VkImageMemoryRequirementsInfo2"/>
         <type category="struct" name="VkImageSparseMemoryRequirementsInfo2">
             <member values="VK_STRUCTURE_TYPE_IMAGE_SPARSE_MEMORY_REQUIREMENTS_INFO_2"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                                                          <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                                                          <name>pNext</name></member>
             <member><type>VkImage</type>                                                              <name>image</name></member>
         </type>
         <type category="struct" name="VkImageSparseMemoryRequirementsInfo2KHR"                 alias="VkImageSparseMemoryRequirementsInfo2"/>
         <type category="struct" name="VkMemoryRequirements2" returnedonly="true">
             <member values="VK_STRUCTURE_TYPE_MEMORY_REQUIREMENTS_2"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>* <name>pNext</name></member>
+            <member optional="true"><type>void</type>* <name>pNext</name></member>
             <member><type>VkMemoryRequirements</type>                                                 <name>memoryRequirements</name></member>
         </type>
         <type category="struct" name="VkMemoryRequirements2KHR"                                alias="VkMemoryRequirements2"/>
         <type category="struct" name="VkSparseImageMemoryRequirements2" returnedonly="true">
             <member values="VK_STRUCTURE_TYPE_SPARSE_IMAGE_MEMORY_REQUIREMENTS_2"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                                       <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                                       <name>pNext</name></member>
             <member><type>VkSparseImageMemoryRequirements</type>                                      <name>memoryRequirements</name></member>
         </type>
         <type category="struct" name="VkSparseImageMemoryRequirements2KHR"                     alias="VkSparseImageMemoryRequirements2"/>
         <type category="struct" name="VkPhysicalDevicePointClippingProperties" returnedonly="true" structextends="VkPhysicalDeviceProperties2">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_POINT_CLIPPING_PROPERTIES"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                            <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                            <name>pNext</name></member>
             <member><type>VkPointClippingBehavior</type>      <name>pointClippingBehavior</name></member>
         </type>
         <type category="struct" name="VkPhysicalDevicePointClippingPropertiesKHR"              alias="VkPhysicalDevicePointClippingProperties"/>
         <type category="struct" name="VkMemoryDedicatedRequirements" returnedonly="true" structextends="VkMemoryRequirements2">
             <member values="VK_STRUCTURE_TYPE_MEMORY_DEDICATED_REQUIREMENTS"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                            <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                            <name>pNext</name></member>
             <member><type>VkBool32</type>                         <name>prefersDedicatedAllocation</name></member>
             <member><type>VkBool32</type>                         <name>requiresDedicatedAllocation</name></member>
         </type>
         <type category="struct" name="VkMemoryDedicatedRequirementsKHR"                        alias="VkMemoryDedicatedRequirements"/>
         <type category="struct" name="VkMemoryDedicatedAllocateInfo" structextends="VkMemoryAllocateInfo">
             <member values="VK_STRUCTURE_TYPE_MEMORY_DEDICATED_ALLOCATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member optional="true"><type>VkImage</type>          <name>image</name><comment>Image that this allocation will be bound to</comment></member>
             <member optional="true"><type>VkBuffer</type>         <name>buffer</name><comment>Buffer that this allocation will be bound to</comment></member>
         </type>
         <type category="struct" name="VkMemoryDedicatedAllocateInfoKHR"                        alias="VkMemoryDedicatedAllocateInfo"/>
         <type category="struct" name="VkImageViewUsageCreateInfo" structextends="VkImageViewCreateInfo">
             <member values="VK_STRUCTURE_TYPE_IMAGE_VIEW_USAGE_CREATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>* <name>pNext</name></member>
+            <member optional="true">const <type>void</type>* <name>pNext</name></member>
             <member><type>VkImageUsageFlags</type> <name>usage</name></member>
         </type>
         <type category="struct" name="VkImageViewUsageCreateInfoKHR"                           alias="VkImageViewUsageCreateInfo"/>
         <type category="struct" name="VkPipelineTessellationDomainOriginStateCreateInfo" structextends="VkPipelineTessellationStateCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PIPELINE_TESSELLATION_DOMAIN_ORIGIN_STATE_CREATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member><type>VkTessellationDomainOrigin</type>    <name>domainOrigin</name></member>
         </type>
         <type category="struct" name="VkPipelineTessellationDomainOriginStateCreateInfoKHR"    alias="VkPipelineTessellationDomainOriginStateCreateInfo"/>
         <type category="struct" name="VkSamplerYcbcrConversionInfo" structextends="VkSamplerCreateInfo,VkImageViewCreateInfo">
             <member values="VK_STRUCTURE_TYPE_SAMPLER_YCBCR_CONVERSION_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member><type>VkSamplerYcbcrConversion</type>      <name>conversion</name></member>
         </type>
         <type category="struct" name="VkSamplerYcbcrConversionInfoKHR"                         alias="VkSamplerYcbcrConversionInfo"/>
         <type category="struct" name="VkSamplerYcbcrConversionCreateInfo">
             <member values="VK_STRUCTURE_TYPE_SAMPLER_YCBCR_CONVERSION_CREATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member><type>VkFormat</type>                         <name>format</name></member>
             <member><type>VkSamplerYcbcrModelConversion</type> <name>ycbcrModel</name></member>
             <member><type>VkSamplerYcbcrRange</type>           <name>ycbcrRange</name></member>
@@ -2819,72 +2848,72 @@ typedef void <name>CAMetalLayer</name>;
         <type category="struct" name="VkSamplerYcbcrConversionCreateInfoKHR"                   alias="VkSamplerYcbcrConversionCreateInfo"/>
         <type category="struct" name="VkBindImagePlaneMemoryInfo" structextends="VkBindImageMemoryInfo">
             <member values="VK_STRUCTURE_TYPE_BIND_IMAGE_PLANE_MEMORY_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member><type>VkImageAspectFlagBits</type>            <name>planeAspect</name></member>
         </type>
         <type category="struct" name="VkBindImagePlaneMemoryInfoKHR"                           alias="VkBindImagePlaneMemoryInfo"/>
         <type category="struct" name="VkImagePlaneMemoryRequirementsInfo" structextends="VkImageMemoryRequirementsInfo2">
             <member values="VK_STRUCTURE_TYPE_IMAGE_PLANE_MEMORY_REQUIREMENTS_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member><type>VkImageAspectFlagBits</type>            <name>planeAspect</name></member>
         </type>
         <type category="struct" name="VkImagePlaneMemoryRequirementsInfoKHR"                   alias="VkImagePlaneMemoryRequirementsInfo"/>
         <type category="struct" name="VkPhysicalDeviceSamplerYcbcrConversionFeatures" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SAMPLER_YCBCR_CONVERSION_FEATURES"><type>VkStructureType</type> <name>sType</name></member>
-            <member noautovalidity="true"><type>void</type>*      <name>pNext</name></member>
+            <member optional="true"><type>void</type>*      <name>pNext</name></member>
             <member><type>VkBool32</type>                         <name>samplerYcbcrConversion</name><comment>Sampler color conversion supported</comment></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceSamplerYcbcrConversionFeaturesKHR"       alias="VkPhysicalDeviceSamplerYcbcrConversionFeatures"/>
         <type category="struct" name="VkSamplerYcbcrConversionImageFormatProperties" returnedonly="true" structextends="VkImageFormatProperties2">
             <member values="VK_STRUCTURE_TYPE_SAMPLER_YCBCR_CONVERSION_IMAGE_FORMAT_PROPERTIES"><type>VkStructureType</type> <name>sType</name></member>
-            <member noautovalidity="true"><type>void</type>*      <name>pNext</name></member>
+            <member optional="true"><type>void</type>*      <name>pNext</name></member>
             <member><type>uint32_t</type>                         <name>combinedImageSamplerDescriptorCount</name></member>
         </type>
         <type category="struct" name="VkSamplerYcbcrConversionImageFormatPropertiesKHR"        alias="VkSamplerYcbcrConversionImageFormatProperties"/>
         <type category="struct" name="VkTextureLODGatherFormatPropertiesAMD" returnedonly="true" structextends="VkImageFormatProperties2">
             <member values="VK_STRUCTURE_TYPE_TEXTURE_LOD_GATHER_FORMAT_PROPERTIES_AMD"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                            <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                            <name>pNext</name></member>
             <member><type>VkBool32</type>                         <name>supportsTextureGatherLODBiasAMD</name></member>
         </type>
         <type category="struct" name="VkConditionalRenderingBeginInfoEXT">
             <member values="VK_STRUCTURE_TYPE_CONDITIONAL_RENDERING_BEGIN_INFO_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member><type>VkBuffer</type>                         <name>buffer</name></member>
             <member><type>VkDeviceSize</type>                     <name>offset</name></member>
             <member optional="true"><type>VkConditionalRenderingFlagsEXT</type>    <name>flags</name></member>
         </type>
         <type category="struct" name="VkProtectedSubmitInfo" structextends="VkSubmitInfo">
             <member values="VK_STRUCTURE_TYPE_PROTECTED_SUBMIT_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                     <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                     <name>pNext</name></member>
             <member><type>VkBool32</type>                        <name>protectedSubmit</name><comment>Submit protected command buffers</comment></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceProtectedMemoryFeatures" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_PROTECTED_MEMORY_FEATURES"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                               <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                               <name>pNext</name></member>
             <member><type>VkBool32</type>                            <name>protectedMemory</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceProtectedMemoryProperties" returnedonly="true" structextends="VkPhysicalDeviceProperties2">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_PROTECTED_MEMORY_PROPERTIES"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                               <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                               <name>pNext</name></member>
             <member><type>VkBool32</type>                            <name>protectedNoFault</name></member>
         </type>
         <type category="struct" name="VkDeviceQueueInfo2">
             <member values="VK_STRUCTURE_TYPE_DEVICE_QUEUE_INFO_2"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                         <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                         <name>pNext</name></member>
             <member optional="true"><type>VkDeviceQueueCreateFlags</type>            <name>flags</name></member>
             <member><type>uint32_t</type>                            <name>queueFamilyIndex</name></member>
             <member><type>uint32_t</type>                            <name>queueIndex</name></member>
         </type>
         <type category="struct" name="VkPipelineCoverageToColorStateCreateInfoNV" structextends="VkPipelineMultisampleStateCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PIPELINE_COVERAGE_TO_COLOR_STATE_CREATE_INFO_NV"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                                                                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                                                                      <name>pNext</name></member>
             <member optional="true"><type>VkPipelineCoverageToColorStateCreateFlagsNV</type>                    <name>flags</name></member>
             <member><type>VkBool32</type>                         <name>coverageToColorEnable</name></member>
             <member optional="true"><type>uint32_t</type>         <name>coverageToColorLocation</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceSamplerFilterMinmaxProperties" returnedonly="true" structextends="VkPhysicalDeviceProperties2">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SAMPLER_FILTER_MINMAX_PROPERTIES"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                  <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                  <name>pNext</name></member>
             <member><type>VkBool32</type>               <name>filterMinmaxSingleComponentFormats</name></member>
             <member><type>VkBool32</type>               <name>filterMinmaxImageComponentMapping</name></member>
         </type>
@@ -2895,7 +2924,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkSampleLocationsInfoEXT" structextends="VkImageMemoryBarrier">
             <member values="VK_STRUCTURE_TYPE_SAMPLE_LOCATIONS_INFO_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                            <name>pNext</name></member>
             <member optional="true"><type>VkSampleCountFlagBits</type>  <name>sampleLocationsPerPixel</name></member>
             <member><type>VkExtent2D</type>                             <name>sampleLocationGridSize</name></member>
             <member optional="true"><type>uint32_t</type>               <name>sampleLocationsCount</name></member>
@@ -2911,7 +2940,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkRenderPassSampleLocationsBeginInfoEXT" structextends="VkRenderPassBeginInfo">
             <member values="VK_STRUCTURE_TYPE_RENDER_PASS_SAMPLE_LOCATIONS_BEGIN_INFO_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member optional="true"><type>uint32_t</type>         <name>attachmentInitialSampleLocationsCount</name></member>
             <member len="attachmentInitialSampleLocationsCount">const <type>VkAttachmentSampleLocationsEXT</type>* <name>pAttachmentInitialSampleLocations</name></member>
             <member optional="true"><type>uint32_t</type>         <name>postSubpassSampleLocationsCount</name></member>
@@ -2919,13 +2948,13 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkPipelineSampleLocationsStateCreateInfoEXT" structextends="VkPipelineMultisampleStateCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PIPELINE_SAMPLE_LOCATIONS_STATE_CREATE_INFO_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member><type>VkBool32</type>                         <name>sampleLocationsEnable</name></member>
             <member><type>VkSampleLocationsInfoEXT</type>         <name>sampleLocationsInfo</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceSampleLocationsPropertiesEXT" returnedonly="true" structextends="VkPhysicalDeviceProperties2">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SAMPLE_LOCATIONS_PROPERTIES_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                            <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                            <name>pNext</name></member>
             <member><type>VkSampleCountFlags</type>               <name>sampleLocationSampleCounts</name></member>
             <member><type>VkExtent2D</type>                       <name>maxSampleLocationGridSize</name></member>
             <member><type>float</type>                            <name>sampleLocationCoordinateRange</name>[2]</member>
@@ -2934,23 +2963,23 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkMultisamplePropertiesEXT" returnedonly="true">
             <member values="VK_STRUCTURE_TYPE_MULTISAMPLE_PROPERTIES_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                            <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                            <name>pNext</name></member>
             <member><type>VkExtent2D</type>                       <name>maxSampleLocationGridSize</name></member>
         </type>
         <type category="struct" name="VkSamplerReductionModeCreateInfo" structextends="VkSamplerCreateInfo">
             <member values="VK_STRUCTURE_TYPE_SAMPLER_REDUCTION_MODE_CREATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member><type>VkSamplerReductionMode</type>           <name>reductionMode</name></member>
         </type>
         <type category="struct" name="VkSamplerReductionModeCreateInfoEXT" alias="VkSamplerReductionModeCreateInfo"/>
         <type category="struct" name="VkPhysicalDeviceBlendOperationAdvancedFeaturesEXT" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_BLEND_OPERATION_ADVANCED_FEATURES_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member noautovalidity="true"><type>void</type>*                            <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                            <name>pNext</name></member>
             <member><type>VkBool32</type>                         <name>advancedBlendCoherentOperations</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceBlendOperationAdvancedPropertiesEXT" returnedonly="true" structextends="VkPhysicalDeviceProperties2">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_BLEND_OPERATION_ADVANCED_PROPERTIES_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member noautovalidity="true"><type>void</type>*                            <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                            <name>pNext</name></member>
             <member><type>uint32_t</type>                         <name>advancedBlendMaxColorAttachments</name></member>
             <member><type>VkBool32</type>                         <name>advancedBlendIndependentBlend</name></member>
             <member><type>VkBool32</type>                         <name>advancedBlendNonPremultipliedSrcColor</name></member>
@@ -2960,20 +2989,20 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkPipelineColorBlendAdvancedStateCreateInfoEXT" structextends="VkPipelineColorBlendStateCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PIPELINE_COLOR_BLEND_ADVANCED_STATE_CREATE_INFO_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member><type>VkBool32</type>               <name>srcPremultiplied</name></member>
             <member><type>VkBool32</type>               <name>dstPremultiplied</name></member>
             <member><type>VkBlendOverlapEXT</type>      <name>blendOverlap</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceInlineUniformBlockFeaturesEXT" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_INLINE_UNIFORM_BLOCK_FEATURES_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                  <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                  <name>pNext</name></member>
             <member><type>VkBool32</type>               <name>inlineUniformBlock</name></member>
             <member><type>VkBool32</type>               <name>descriptorBindingInlineUniformBlockUpdateAfterBind</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceInlineUniformBlockPropertiesEXT" returnedonly="true" structextends="VkPhysicalDeviceProperties2">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_INLINE_UNIFORM_BLOCK_PROPERTIES_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                  <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                  <name>pNext</name></member>
             <member><type>uint32_t</type>               <name>maxInlineUniformBlockSize</name></member>
             <member><type>uint32_t</type>               <name>maxPerStageDescriptorInlineUniformBlocks</name></member>
             <member><type>uint32_t</type>               <name>maxPerStageDescriptorUpdateAfterBindInlineUniformBlocks</name></member>
@@ -2982,18 +3011,18 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkWriteDescriptorSetInlineUniformBlockEXT" structextends="VkWriteDescriptorSet">
             <member values="VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET_INLINE_UNIFORM_BLOCK_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member><type>uint32_t</type>               <name>dataSize</name></member>
             <member len="dataSize">const <type>void</type>* <name>pData</name></member>
         </type>
         <type category="struct" name="VkDescriptorPoolInlineUniformBlockCreateInfoEXT" structextends="VkDescriptorPoolCreateInfo">
             <member values="VK_STRUCTURE_TYPE_DESCRIPTOR_POOL_INLINE_UNIFORM_BLOCK_CREATE_INFO_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member><type>uint32_t</type>               <name>maxInlineUniformBlockBindings</name></member>
         </type>
         <type category="struct" name="VkPipelineCoverageModulationStateCreateInfoNV" structextends="VkPipelineMultisampleStateCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PIPELINE_COVERAGE_MODULATION_STATE_CREATE_INFO_NV"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                                                                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                                                                      <name>pNext</name></member>
             <member optional="true"><type>VkPipelineCoverageModulationStateCreateFlagsNV</type>                   <name>flags</name></member>
             <member><type>VkCoverageModulationModeNV</type>                                                       <name>coverageModulationMode</name></member>
             <member><type>VkBool32</type>                                                                         <name>coverageModulationTableEnable</name></member>
@@ -3002,45 +3031,45 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkImageFormatListCreateInfo" structextends="VkImageCreateInfo,VkSwapchainCreateInfoKHR,VkPhysicalDeviceImageFormatInfo2">
             <member values="VK_STRUCTURE_TYPE_IMAGE_FORMAT_LIST_CREATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                            <name>pNext</name></member>
             <member optional="true"><type>uint32_t</type>               <name>viewFormatCount</name></member>
             <member len="viewFormatCount">const <type>VkFormat</type>*  <name>pViewFormats</name></member>
         </type>
         <type category="struct" name="VkImageFormatListCreateInfoKHR"                          alias="VkImageFormatListCreateInfo"/>
         <type category="struct" name="VkValidationCacheCreateInfoEXT">
             <member values="VK_STRUCTURE_TYPE_VALIDATION_CACHE_CREATE_INFO_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member optional="true"><type>VkValidationCacheCreateFlagsEXT</type>    <name>flags</name></member>
             <member optional="true"><type>size_t</type>                 <name>initialDataSize</name></member>
             <member len="initialDataSize">const <type>void</type>*            <name>pInitialData</name></member>
         </type>
         <type category="struct" name="VkShaderModuleValidationCacheCreateInfoEXT" structextends="VkShaderModuleCreateInfo">
             <member values="VK_STRUCTURE_TYPE_SHADER_MODULE_VALIDATION_CACHE_CREATE_INFO_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member><type>VkValidationCacheEXT</type>    <name>validationCache</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceMaintenance3Properties" returnedonly="true" structextends="VkPhysicalDeviceProperties2">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_MAINTENANCE_3_PROPERTIES"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                            <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                            <name>pNext</name></member>
             <member><type>uint32_t</type>                         <name>maxPerSetDescriptors</name></member>
             <member><type>VkDeviceSize</type>                     <name>maxMemoryAllocationSize</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceMaintenance3PropertiesKHR"               alias="VkPhysicalDeviceMaintenance3Properties"/>
         <type category="struct" name="VkDescriptorSetLayoutSupport" returnedonly="true">
             <member values="VK_STRUCTURE_TYPE_DESCRIPTOR_SET_LAYOUT_SUPPORT"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*            <name>pNext</name></member>
+            <member optional="true"><type>void</type>*            <name>pNext</name></member>
             <member><type>VkBool32</type>         <name>supported</name></member>
         </type>
         <type category="struct" name="VkDescriptorSetLayoutSupportKHR"                         alias="VkDescriptorSetLayoutSupport"/>
         <type category="struct" name="VkPhysicalDeviceShaderDrawParametersFeatures" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SHADER_DRAW_PARAMETERS_FEATURES"><type>VkStructureType</type> <name>sType</name></member>
-            <member noautovalidity="true"><type>void</type>*                            <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                            <name>pNext</name></member>
             <member><type>VkBool32</type>                         <name>shaderDrawParameters</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceShaderDrawParameterFeatures"             alias="VkPhysicalDeviceShaderDrawParametersFeatures"/>
         <type category="struct" name="VkPhysicalDeviceShaderFloat16Int8Features" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SHADER_FLOAT16_INT8_FEATURES"><type>VkStructureType</type> <name>sType</name></member>
-            <member noautovalidity="true"><type>void</type>*      <name>pNext</name></member>
+            <member optional="true"><type>void</type>*      <name>pNext</name></member>
             <member><type>VkBool32</type>                         <name>shaderFloat16</name><comment>16-bit floats (halfs) in shaders</comment></member>
             <member><type>VkBool32</type>                         <name>shaderInt8</name><comment>8-bit integers in shaders</comment></member>
         </type>
@@ -3048,7 +3077,7 @@ typedef void <name>CAMetalLayer</name>;
         <type category="struct" name="VkPhysicalDeviceFloat16Int8FeaturesKHR"                  alias="VkPhysicalDeviceShaderFloat16Int8Features"/>
         <type category="struct" name="VkPhysicalDeviceFloatControlsProperties" returnedonly="true" structextends="VkPhysicalDeviceProperties2">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FLOAT_CONTROLS_PROPERTIES"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                            <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                            <name>pNext</name></member>
             <member><type>VkShaderFloatControlsIndependence</type> <name>denormBehaviorIndependence</name></member>
             <member><type>VkShaderFloatControlsIndependence</type> <name>roundingModeIndependence</name></member>
             <member><type>VkBool32</type>                         <name>shaderSignedZeroInfNanPreserveFloat16</name><comment>An implementation can preserve signed zero, nan, inf</comment></member>
@@ -3070,7 +3099,7 @@ typedef void <name>CAMetalLayer</name>;
         <type category="struct" name="VkPhysicalDeviceFloatControlsPropertiesKHR"              alias="VkPhysicalDeviceFloatControlsProperties"/>
         <type category="struct" name="VkPhysicalDeviceHostQueryResetFeatures" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_HOST_QUERY_RESET_FEATURES"><type>VkStructureType</type> <name>sType</name></member>
-            <member noautovalidity="true"><type>void</type>*        <name>pNext</name></member>
+            <member optional="true"><type>void</type>*        <name>pNext</name></member>
             <member><type>VkBool32</type>                           <name>hostQueryReset</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceHostQueryResetFeaturesEXT"               alias="VkPhysicalDeviceHostQueryResetFeatures"/>
@@ -3080,7 +3109,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkNativeBufferANDROID">
             <member values="VK_STRUCTURE_TYPE_NATIVE_BUFFER_ANDROID"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>* <name>pNext</name></member>
+            <member optional="true">const <type>void</type>* <name>pNext</name></member>
             <member>const <type>void</type>* <name>handle</name></member>
             <member><type>int</type> <name>stride</name></member>
             <member><type>int</type> <name>format</name></member>
@@ -3089,12 +3118,12 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkSwapchainImageCreateInfoANDROID">
             <member values="VK_STRUCTURE_TYPE_SWAPCHAIN_IMAGE_CREATE_INFO_ANDROID"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>* <name>pNext</name></member>
+            <member optional="true">const <type>void</type>* <name>pNext</name></member>
             <member><type>VkSwapchainImageUsageFlagsANDROID</type> <name>usage</name></member>
         </type>
         <type category="struct" name="VkPhysicalDevicePresentationPropertiesANDROID">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_PRESENTATION_PROPERTIES_ANDROID"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>* <name>pNext</name></member>
+            <member optional="true">const <type>void</type>* <name>pNext</name></member>
             <member><type>VkBool32</type> <name>sharedImage</name></member>
         </type>
         <type category="struct" name="VkShaderResourceUsageAMD" returnedonly="true">
@@ -3115,19 +3144,19 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkDeviceQueueGlobalPriorityCreateInfoEXT" structextends="VkDeviceQueueCreateInfo">
             <member values="VK_STRUCTURE_TYPE_DEVICE_QUEUE_GLOBAL_PRIORITY_CREATE_INFO_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                    <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                    <name>pNext</name></member>
             <member><type>VkQueueGlobalPriorityEXT</type>       <name>globalPriority</name></member>
         </type>
         <type category="struct" name="VkDebugUtilsObjectNameInfoEXT">
             <member values="VK_STRUCTURE_TYPE_DEBUG_UTILS_OBJECT_NAME_INFO_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                                            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                                            <name>pNext</name></member>
             <member><type>VkObjectType</type>                                           <name>objectType</name></member>
             <member><type>uint64_t</type>                                               <name>objectHandle</name></member>
             <member optional="true" len="null-terminated">const <type>char</type>*      <name>pObjectName</name></member>
         </type>
         <type category="struct" name="VkDebugUtilsObjectTagInfoEXT">
             <member values="VK_STRUCTURE_TYPE_DEBUG_UTILS_OBJECT_TAG_INFO_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                            <name>pNext</name></member>
             <member><type>VkObjectType</type>                           <name>objectType</name></member>
             <member><type>uint64_t</type>                               <name>objectHandle</name></member>
             <member><type>uint64_t</type>                               <name>tagName</name></member>
@@ -3136,13 +3165,13 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkDebugUtilsLabelEXT">
             <member values="VK_STRUCTURE_TYPE_DEBUG_UTILS_LABEL_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                            <name>pNext</name></member>
             <member len="null-terminated">const <type>char</type>*      <name>pLabelName</name></member>
             <member optional="true"><type>float</type>                  <name>color</name>[4]</member>
         </type>
-        <type category="struct" name="VkDebugUtilsMessengerCreateInfoEXT" structextends="VkInstanceCreateInfo">
+        <type category="struct" name="VkDebugUtilsMessengerCreateInfoEXT" allowduplicate="true" structextends="VkInstanceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_DEBUG_UTILS_MESSENGER_CREATE_INFO_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                                          <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                                          <name>pNext</name></member>
             <member optional="true"><type>VkDebugUtilsMessengerCreateFlagsEXT</type>  <name>flags</name></member>
             <member><type>VkDebugUtilsMessageSeverityFlagsEXT</type>                  <name>messageSeverity</name></member>
             <member><type>VkDebugUtilsMessageTypeFlagsEXT</type>                      <name>messageType</name></member>
@@ -3163,25 +3192,48 @@ typedef void <name>CAMetalLayer</name>;
             <member optional="true"><type>uint32_t</type>                                                           <name>objectCount</name></member>
             <member len="objectCount">const <type>VkDebugUtilsObjectNameInfoEXT</type>*             <name>pObjects</name></member>
         </type>
+        <type category="struct" name="VkPhysicalDeviceDeviceMemoryReportFeaturesEXT" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
+            <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_DEVICE_MEMORY_REPORT_FEATURES_EXT"><type>VkStructureType</type> <name>sType</name></member>
+            <member optional="true"><type>void</type>* <name>pNext</name></member>
+            <member><type>VkBool32</type>                    <name>deviceMemoryReport</name></member>
+        </type>
+        <type category="struct" name="VkDeviceDeviceMemoryReportCreateInfoEXT" allowduplicate="true" structextends="VkDeviceCreateInfo">
+            <member values="VK_STRUCTURE_TYPE_DEVICE_DEVICE_MEMORY_REPORT_CREATE_INFO_EXT"><type>VkStructureType</type> <name>sType</name></member>
+            <member optional="true">const <type>void</type>*         <name>pNext</name></member>
+            <member><type>VkDeviceMemoryReportFlagsEXT</type>        <name>flags</name></member>
+            <member><type>PFN_vkDeviceMemoryReportCallbackEXT</type> <name>pfnUserCallback</name></member>
+            <member><type>void</type>*                               <name>pUserData</name></member>
+        </type>
+        <type category="struct" name="VkDeviceMemoryReportCallbackDataEXT" returnedonly="true">
+            <member values="VK_STRUCTURE_TYPE_DEVICE_MEMORY_REPORT_CALLBACK_DATA_EXT"><type>VkStructureType</type> <name>sType</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
+            <member><type>VkDeviceMemoryReportFlagsEXT</type>     <name>flags</name></member>
+            <member><type>VkDeviceMemoryReportEventTypeEXT</type> <name>type</name></member>
+            <member><type>uint64_t</type>                         <name>memoryObjectId</name></member>
+            <member optional="true"><type>VkDeviceSize</type>     <name>size</name></member>
+            <member optional="true"><type>VkObjectType</type>     <name>objectType</name></member>
+            <member optional="true"><type>uint64_t</type>         <name>objectHandle</name></member>
+            <member optional="true"><type>uint32_t</type>         <name>heapIndex</name></member>
+        </type>
         <type category="struct" name="VkImportMemoryHostPointerInfoEXT" structextends="VkMemoryAllocateInfo">
             <member values="VK_STRUCTURE_TYPE_IMPORT_MEMORY_HOST_POINTER_INFO_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>* <name>pNext</name></member>
+            <member optional="true">const <type>void</type>* <name>pNext</name></member>
             <member><type>VkExternalMemoryHandleTypeFlagBits</type> <name>handleType</name></member>
             <member optional="false"><type>void</type>* <name>pHostPointer</name></member>
         </type>
         <type category="struct" name="VkMemoryHostPointerPropertiesEXT" returnedonly="true">
             <member values="VK_STRUCTURE_TYPE_MEMORY_HOST_POINTER_PROPERTIES_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>* <name>pNext</name></member>
+            <member optional="true"><type>void</type>* <name>pNext</name></member>
             <member><type>uint32_t</type> <name>memoryTypeBits</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceExternalMemoryHostPropertiesEXT" returnedonly="true" structextends="VkPhysicalDeviceProperties2">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_EXTERNAL_MEMORY_HOST_PROPERTIES_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>* <name>pNext</name></member>
+            <member optional="true"><type>void</type>* <name>pNext</name></member>
             <member><type>VkDeviceSize</type> <name>minImportedHostPointerAlignment</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceConservativeRasterizationPropertiesEXT" returnedonly="true" structextends="VkPhysicalDeviceProperties2">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_CONSERVATIVE_RASTERIZATION_PROPERTIES_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                  <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                  <name>pNext</name></member>
             <member><type>float</type>                  <name>primitiveOverestimationSize</name><comment>The size in pixels the primitive is enlarged at each edge during conservative rasterization</comment></member>
             <member><type>float</type>                  <name>maxExtraPrimitiveOverestimationSize</name><comment>The maximum additional overestimation the client can specify in the pipeline state</comment></member>
             <member><type>float</type>                  <name>extraPrimitiveOverestimationSizeGranularity</name><comment>The granularity of extra overestimation sizes the implementations supports between 0 and maxExtraOverestimationSize</comment></member>
@@ -3194,12 +3246,12 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkCalibratedTimestampInfoEXT">
             <member values="VK_STRUCTURE_TYPE_CALIBRATED_TIMESTAMP_INFO_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member><type>VkTimeDomainEXT</type>        <name>timeDomain</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceShaderCorePropertiesAMD" returnedonly="true" structextends="VkPhysicalDeviceProperties2">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SHADER_CORE_PROPERTIES_AMD"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*    <name>pNext</name></member>
+            <member optional="true"><type>void</type>*    <name>pNext</name></member>
             <member><type>uint32_t</type> <name>shaderEngineCount</name><comment>number of shader engines</comment></member>
             <member><type>uint32_t</type> <name>shaderArraysPerEngineCount</name><comment>number of shader arrays</comment></member>
             <member><type>uint32_t</type> <name>computeUnitsPerShaderArray</name><comment>number of physical CUs per shader array</comment></member>
@@ -3217,20 +3269,20 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkPhysicalDeviceShaderCoreProperties2AMD" returnedonly="true" structextends="VkPhysicalDeviceProperties2">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SHADER_CORE_PROPERTIES_2_AMD"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*    <name>pNext</name><comment>Pointer to next structure</comment></member>
+            <member optional="true"><type>void</type>*    <name>pNext</name><comment>Pointer to next structure</comment></member>
             <member><type>VkShaderCorePropertiesFlagsAMD</type> <name>shaderCoreFeatures</name><comment>features supported by the shader core</comment></member>
             <member><type>uint32_t</type> <name>activeComputeUnitCount</name><comment>number of active compute units across all shader engines/arrays</comment></member>
         </type>
         <type category="struct" name="VkPipelineRasterizationConservativeStateCreateInfoEXT" structextends="VkPipelineRasterizationStateCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PIPELINE_RASTERIZATION_CONSERVATIVE_STATE_CREATE_INFO_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                                                                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                                                                      <name>pNext</name></member>
             <member optional="true"><type>VkPipelineRasterizationConservativeStateCreateFlagsEXT</type>           <name>flags</name><comment>Reserved</comment></member>
             <member><type>VkConservativeRasterizationModeEXT</type>                                               <name>conservativeRasterizationMode</name><comment>Conservative rasterization mode</comment></member>
             <member><type>float</type>                                                                            <name>extraPrimitiveOverestimationSize</name><comment>Extra overestimation to add to the primitive</comment></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceDescriptorIndexingFeatures" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_DESCRIPTOR_INDEXING_FEATURES"><type>VkStructureType</type> <name>sType</name></member>
-            <member noautovalidity="true"><type>void</type>*                            <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                            <name>pNext</name></member>
             <member><type>VkBool32</type>               <name>shaderInputAttachmentArrayDynamicIndexing</name></member>
             <member><type>VkBool32</type>               <name>shaderUniformTexelBufferArrayDynamicIndexing</name></member>
             <member><type>VkBool32</type>               <name>shaderStorageTexelBufferArrayDynamicIndexing</name></member>
@@ -3255,7 +3307,7 @@ typedef void <name>CAMetalLayer</name>;
         <type category="struct" name="VkPhysicalDeviceDescriptorIndexingFeaturesEXT"           alias="VkPhysicalDeviceDescriptorIndexingFeatures"/>
         <type category="struct" name="VkPhysicalDeviceDescriptorIndexingProperties" returnedonly="true" structextends="VkPhysicalDeviceProperties2">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_DESCRIPTOR_INDEXING_PROPERTIES"><type>VkStructureType</type> <name>sType</name></member>
-            <member noautovalidity="true"><type>void</type>*                            <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                            <name>pNext</name></member>
             <member><type>uint32_t</type>               <name>maxUpdateAfterBindDescriptorsInAllPools</name></member>
             <member><type>VkBool32</type>               <name>shaderUniformBufferArrayNonUniformIndexingNative</name></member>
             <member><type>VkBool32</type>               <name>shaderSampledImageArrayNonUniformIndexingNative</name></member>
@@ -3283,27 +3335,27 @@ typedef void <name>CAMetalLayer</name>;
         <type category="struct" name="VkPhysicalDeviceDescriptorIndexingPropertiesEXT"         alias="VkPhysicalDeviceDescriptorIndexingProperties"/>
         <type category="struct" name="VkDescriptorSetLayoutBindingFlagsCreateInfo" structextends="VkDescriptorSetLayoutCreateInfo">
             <member values="VK_STRUCTURE_TYPE_DESCRIPTOR_SET_LAYOUT_BINDING_FLAGS_CREATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                                                        <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                                                        <name>pNext</name></member>
             <member optional="true"><type>uint32_t</type>                                           <name>bindingCount</name></member>
-            <member len="bindingCount" optional="true">const <type>VkDescriptorBindingFlags</type>* <name>pBindingFlags</name></member>
+            <member len="bindingCount" optional="false,true">const <type>VkDescriptorBindingFlags</type>* <name>pBindingFlags</name></member>
         </type>
         <type category="struct" name="VkDescriptorSetLayoutBindingFlagsCreateInfoEXT"          alias="VkDescriptorSetLayoutBindingFlagsCreateInfo"/>
         <type category="struct" name="VkDescriptorSetVariableDescriptorCountAllocateInfo" structextends="VkDescriptorSetAllocateInfo">
             <member values="VK_STRUCTURE_TYPE_DESCRIPTOR_SET_VARIABLE_DESCRIPTOR_COUNT_ALLOCATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                            <name>pNext</name></member>
             <member optional="true"><type>uint32_t</type>               <name>descriptorSetCount</name></member>
             <member len="descriptorSetCount">const <type>uint32_t</type>* <name>pDescriptorCounts</name></member>
         </type>
         <type category="struct" name="VkDescriptorSetVariableDescriptorCountAllocateInfoEXT"   alias="VkDescriptorSetVariableDescriptorCountAllocateInfo"/>
         <type category="struct" name="VkDescriptorSetVariableDescriptorCountLayoutSupport" structextends="VkDescriptorSetLayoutSupport" returnedonly="true">
             <member values="VK_STRUCTURE_TYPE_DESCRIPTOR_SET_VARIABLE_DESCRIPTOR_COUNT_LAYOUT_SUPPORT"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*            <name>pNext</name></member>
+            <member optional="true"><type>void</type>*            <name>pNext</name></member>
             <member><type>uint32_t</type>         <name>maxVariableDescriptorCount</name></member>
         </type>
         <type category="struct" name="VkDescriptorSetVariableDescriptorCountLayoutSupportEXT"  alias="VkDescriptorSetVariableDescriptorCountLayoutSupport"/>
         <type category="struct" name="VkAttachmentDescription2">
             <member values="VK_STRUCTURE_TYPE_ATTACHMENT_DESCRIPTION_2"><type>VkStructureType</type> <name>sType</name></member>
-            <member noautovalidity="true">const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member optional="true"><type>VkAttachmentDescriptionFlags</type> <name>flags</name></member>
             <member><type>VkFormat</type>                                     <name>format</name></member>
             <member><type>VkSampleCountFlagBits</type>                        <name>samples</name></member>
@@ -3317,7 +3369,7 @@ typedef void <name>CAMetalLayer</name>;
         <type category="struct" name="VkAttachmentDescription2KHR"                             alias="VkAttachmentDescription2"/>
         <type category="struct" name="VkAttachmentReference2">
             <member values="VK_STRUCTURE_TYPE_ATTACHMENT_REFERENCE_2"><type>VkStructureType</type> <name>sType</name></member>
-            <member noautovalidity="true">const <type>void</type>* <name>pNext</name></member>
+            <member optional="true">const <type>void</type>* <name>pNext</name></member>
             <member><type>uint32_t</type>                          <name>attachment</name></member>
             <member><type>VkImageLayout</type>                     <name>layout</name></member>
             <member noautovalidity="true"><type>VkImageAspectFlags</type> <name>aspectMask</name></member>
@@ -3325,7 +3377,7 @@ typedef void <name>CAMetalLayer</name>;
         <type category="struct" name="VkAttachmentReference2KHR"                               alias="VkAttachmentReference2"/>
         <type category="struct" name="VkSubpassDescription2">
             <member values="VK_STRUCTURE_TYPE_SUBPASS_DESCRIPTION_2"><type>VkStructureType</type> <name>sType</name></member>
-            <member noautovalidity="true">const <type>void</type>*                           <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                           <name>pNext</name></member>
             <member optional="true"><type>VkSubpassDescriptionFlags</type>                   <name>flags</name></member>
             <member><type>VkPipelineBindPoint</type>                                         <name>pipelineBindPoint</name></member>
             <member><type>uint32_t</type>                                                    <name>viewMask</name></member>
@@ -3341,7 +3393,7 @@ typedef void <name>CAMetalLayer</name>;
         <type category="struct" name="VkSubpassDescription2KHR"                                alias="VkSubpassDescription2"/>
         <type category="struct" name="VkSubpassDependency2">
             <member values="VK_STRUCTURE_TYPE_SUBPASS_DEPENDENCY_2"><type>VkStructureType</type> <name>sType</name></member>
-            <member noautovalidity="true">const <type>void</type>* <name>pNext</name></member>
+            <member optional="true">const <type>void</type>* <name>pNext</name></member>
             <member><type>uint32_t</type>                          <name>srcSubpass</name></member>
             <member><type>uint32_t</type>                          <name>dstSubpass</name></member>
             <member><type>VkPipelineStageFlags</type>              <name>srcStageMask</name></member>
@@ -3354,7 +3406,7 @@ typedef void <name>CAMetalLayer</name>;
         <type category="struct" name="VkSubpassDependency2KHR"                                 alias="VkSubpassDependency2"/>
         <type category="struct" name="VkRenderPassCreateInfo2">
             <member values="VK_STRUCTURE_TYPE_RENDER_PASS_CREATE_INFO_2"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                                              <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                                              <name>pNext</name></member>
             <member optional="true"><type>VkRenderPassCreateFlags</type>                  <name>flags</name></member>
             <member optional="true"><type>uint32_t</type>                                 <name>attachmentCount</name></member>
             <member len="attachmentCount">const <type>VkAttachmentDescription2</type>*    <name>pAttachments</name></member>
@@ -3368,37 +3420,37 @@ typedef void <name>CAMetalLayer</name>;
         <type category="struct" name="VkRenderPassCreateInfo2KHR"                              alias="VkRenderPassCreateInfo2"/>
         <type category="struct" name="VkSubpassBeginInfo">
             <member values="VK_STRUCTURE_TYPE_SUBPASS_BEGIN_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member><type>VkSubpassContents</type>      <name>contents</name></member>
         </type>
         <type category="struct" name="VkSubpassBeginInfoKHR"                                   alias="VkSubpassBeginInfo"/>
         <type category="struct" name="VkSubpassEndInfo">
             <member values="VK_STRUCTURE_TYPE_SUBPASS_END_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
         </type>
         <type category="struct" name="VkSubpassEndInfoKHR"                                     alias="VkSubpassEndInfo"/>
         <type category="struct" name="VkPhysicalDeviceTimelineSemaphoreFeatures" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_TIMELINE_SEMAPHORE_FEATURES"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                  <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                  <name>pNext</name></member>
             <member><type>VkBool32</type>               <name>timelineSemaphore</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceTimelineSemaphoreFeaturesKHR"            alias="VkPhysicalDeviceTimelineSemaphoreFeatures"/>
         <type category="struct" name="VkPhysicalDeviceTimelineSemaphoreProperties" structextends="VkPhysicalDeviceProperties2" returnedonly="true">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_TIMELINE_SEMAPHORE_PROPERTIES"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                  <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                  <name>pNext</name></member>
             <member><type>uint64_t</type>               <name>maxTimelineSemaphoreValueDifference</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceTimelineSemaphorePropertiesKHR"          alias="VkPhysicalDeviceTimelineSemaphoreProperties"/>
         <type category="struct" name="VkSemaphoreTypeCreateInfo" structextends="VkSemaphoreCreateInfo,VkPhysicalDeviceExternalSemaphoreInfo">
             <member values="VK_STRUCTURE_TYPE_SEMAPHORE_TYPE_CREATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member><type>VkSemaphoreType</type>        <name>semaphoreType</name></member>
             <member><type>uint64_t</type>               <name>initialValue</name></member>
         </type>
         <type category="struct" name="VkSemaphoreTypeCreateInfoKHR"                            alias="VkSemaphoreTypeCreateInfo"/>
         <type category="struct" name="VkTimelineSemaphoreSubmitInfo" structextends="VkSubmitInfo,VkBindSparseInfo">
             <member values="VK_STRUCTURE_TYPE_TIMELINE_SEMAPHORE_SUBMIT_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member optional="true"><type>uint32_t</type>         <name>waitSemaphoreValueCount</name></member>
             <member optional="true" len="waitSemaphoreValueCount">const <type>uint64_t</type>* <name>pWaitSemaphoreValues</name></member>
             <member optional="true"><type>uint32_t</type>         <name>signalSemaphoreValueCount</name></member>
@@ -3407,7 +3459,7 @@ typedef void <name>CAMetalLayer</name>;
         <type category="struct" name="VkTimelineSemaphoreSubmitInfoKHR"                        alias="VkTimelineSemaphoreSubmitInfo"/>
         <type category="struct" name="VkSemaphoreWaitInfo">
             <member values="VK_STRUCTURE_TYPE_SEMAPHORE_WAIT_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member optional="true"><type>VkSemaphoreWaitFlags</type> <name>flags</name></member>
             <member><type>uint32_t</type>               <name>semaphoreCount</name></member>
             <member len="semaphoreCount">const <type>VkSemaphore</type>* <name>pSemaphores</name></member>
@@ -3416,7 +3468,7 @@ typedef void <name>CAMetalLayer</name>;
         <type category="struct" name="VkSemaphoreWaitInfoKHR"                                  alias="VkSemaphoreWaitInfo"/>
         <type category="struct" name="VkSemaphoreSignalInfo">
             <member values="VK_STRUCTURE_TYPE_SEMAPHORE_SIGNAL_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member><type>VkSemaphore</type>            <name>semaphore</name></member>
             <member><type>uint64_t</type>               <name>value</name></member>
         </type>
@@ -3427,18 +3479,18 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkPipelineVertexInputDivisorStateCreateInfoEXT" structextends="VkPipelineVertexInputStateCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PIPELINE_VERTEX_INPUT_DIVISOR_STATE_CREATE_INFO_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                         <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                         <name>pNext</name></member>
             <member><type>uint32_t</type>                            <name>vertexBindingDivisorCount</name></member>
             <member len="vertexBindingDivisorCount">const <type>VkVertexInputBindingDivisorDescriptionEXT</type>*      <name>pVertexBindingDivisors</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceVertexAttributeDivisorPropertiesEXT" returnedonly="true" structextends="VkPhysicalDeviceProperties2">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_VERTEX_ATTRIBUTE_DIVISOR_PROPERTIES_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                  <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                  <name>pNext</name></member>
             <member><type>uint32_t</type>               <name>maxVertexAttribDivisor</name><comment>max value of vertex attribute divisor</comment></member>
         </type>
         <type category="struct" name="VkPhysicalDevicePCIBusInfoPropertiesEXT" structextends="VkPhysicalDeviceProperties2" returnedonly="true">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_PCI_BUS_INFO_PROPERTIES_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                  <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                  <name>pNext</name></member>
             <member><type>uint32_t</type>               <name>pciDomain</name></member>
             <member><type>uint32_t</type>               <name>pciBus</name></member>
             <member><type>uint32_t</type>               <name>pciDevice</name></member>
@@ -3446,28 +3498,28 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkImportAndroidHardwareBufferInfoANDROID" structextends="VkMemoryAllocateInfo">
             <member values="VK_STRUCTURE_TYPE_IMPORT_ANDROID_HARDWARE_BUFFER_INFO_ANDROID"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                        <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                        <name>pNext</name></member>
             <member>struct <type>AHardwareBuffer</type>*            <name>buffer</name></member>
         </type>
         <type category="struct" name="VkAndroidHardwareBufferUsageANDROID" structextends="VkImageFormatProperties2" returnedonly="true">
             <member values="VK_STRUCTURE_TYPE_ANDROID_HARDWARE_BUFFER_USAGE_ANDROID"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                              <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                              <name>pNext</name></member>
             <member><type>uint64_t</type>                           <name>androidHardwareBufferUsage</name></member>
         </type>
         <type category="struct" name="VkAndroidHardwareBufferPropertiesANDROID" returnedonly="true">
             <member values="VK_STRUCTURE_TYPE_ANDROID_HARDWARE_BUFFER_PROPERTIES_ANDROID"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                              <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                              <name>pNext</name></member>
             <member><type>VkDeviceSize</type>                       <name>allocationSize</name></member>
             <member><type>uint32_t</type>                           <name>memoryTypeBits</name></member>
         </type>
         <type category="struct" name="VkMemoryGetAndroidHardwareBufferInfoANDROID">
             <member values="VK_STRUCTURE_TYPE_MEMORY_GET_ANDROID_HARDWARE_BUFFER_INFO_ANDROID"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                        <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                        <name>pNext</name></member>
             <member><type>VkDeviceMemory</type>                     <name>memory</name></member>
         </type>
         <type category="struct" name="VkAndroidHardwareBufferFormatPropertiesANDROID" structextends="VkAndroidHardwareBufferPropertiesANDROID" returnedonly="true">
             <member values="VK_STRUCTURE_TYPE_ANDROID_HARDWARE_BUFFER_FORMAT_PROPERTIES_ANDROID"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                              <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                              <name>pNext</name></member>
             <member><type>VkFormat</type>                           <name>format</name></member>
             <member><type>uint64_t</type>                           <name>externalFormat</name></member>
             <member><type>VkFormatFeatureFlags</type>               <name>formatFeatures</name></member>
@@ -3479,17 +3531,17 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkCommandBufferInheritanceConditionalRenderingInfoEXT" structextends="VkCommandBufferInheritanceInfo">
             <member values="VK_STRUCTURE_TYPE_COMMAND_BUFFER_INHERITANCE_CONDITIONAL_RENDERING_INFO_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                         <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                         <name>pNext</name></member>
             <member><type>VkBool32</type>                            <name>conditionalRenderingEnable</name><comment>Whether this secondary command buffer may be executed during an active conditional rendering</comment></member>
         </type>
         <type category="struct" name="VkExternalFormatANDROID" structextends="VkImageCreateInfo,VkSamplerYcbcrConversionCreateInfo">
             <member values="VK_STRUCTURE_TYPE_EXTERNAL_FORMAT_ANDROID"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                              <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                              <name>pNext</name></member>
             <member><type>uint64_t</type>                           <name>externalFormat</name></member>
         </type>
         <type category="struct" name="VkPhysicalDevice8BitStorageFeatures" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_8BIT_STORAGE_FEATURES"><type>VkStructureType</type> <name>sType</name></member>
-            <member noautovalidity="true"><type>void</type>*      <name>pNext</name></member>
+            <member optional="true"><type>void</type>*      <name>pNext</name></member>
             <member><type>VkBool32</type>                         <name>storageBuffer8BitAccess</name><comment>8-bit integer variables supported in StorageBuffer</comment></member>
             <member><type>VkBool32</type>                         <name>uniformAndStorageBuffer8BitAccess</name><comment>8-bit integer variables supported in StorageBuffer and Uniform</comment></member>
             <member><type>VkBool32</type>                         <name>storagePushConstant8</name><comment>8-bit integer variables supported in PushConstant</comment></member>
@@ -3497,13 +3549,13 @@ typedef void <name>CAMetalLayer</name>;
         <type category="struct" name="VkPhysicalDevice8BitStorageFeaturesKHR"                  alias="VkPhysicalDevice8BitStorageFeatures"/>
         <type category="struct" name="VkPhysicalDeviceConditionalRenderingFeaturesEXT" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_CONDITIONAL_RENDERING_FEATURES_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member noautovalidity="true"><type>void</type>*        <name>pNext</name></member>
+            <member optional="true"><type>void</type>*        <name>pNext</name></member>
             <member><type>VkBool32</type>                           <name>conditionalRendering</name></member>
             <member><type>VkBool32</type>                           <name>inheritedConditionalRendering</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceVulkanMemoryModelFeatures" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_VULKAN_MEMORY_MODEL_FEATURES"><type>VkStructureType</type> <name>sType</name></member>
-            <member noautovalidity="true"><type>void</type>*      <name>pNext</name></member>
+            <member optional="true"><type>void</type>*      <name>pNext</name></member>
             <member><type>VkBool32</type>                         <name>vulkanMemoryModel</name></member>
             <member><type>VkBool32</type>                         <name>vulkanMemoryModelDeviceScope</name></member>
             <member><type>VkBool32</type>                         <name>vulkanMemoryModelAvailabilityVisibilityChains</name></member>
@@ -3511,31 +3563,47 @@ typedef void <name>CAMetalLayer</name>;
         <type category="struct" name="VkPhysicalDeviceVulkanMemoryModelFeaturesKHR"            alias="VkPhysicalDeviceVulkanMemoryModelFeatures"/>
         <type category="struct" name="VkPhysicalDeviceShaderAtomicInt64Features" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SHADER_ATOMIC_INT64_FEATURES"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                               <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                               <name>pNext</name></member>
             <member><type>VkBool32</type>                            <name>shaderBufferInt64Atomics</name></member>
             <member><type>VkBool32</type>                            <name>shaderSharedInt64Atomics</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceShaderAtomicInt64FeaturesKHR"            alias="VkPhysicalDeviceShaderAtomicInt64Features"/>
+        <type category="struct" name="VkPhysicalDeviceShaderAtomicFloatFeaturesEXT" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
+            <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SHADER_ATOMIC_FLOAT_FEATURES_EXT"><type>VkStructureType</type> <name>sType</name></member>
+            <member optional="true"><type>void</type>*                               <name>pNext</name></member>
+            <member><type>VkBool32</type>                            <name>shaderBufferFloat32Atomics</name></member>
+            <member><type>VkBool32</type>                            <name>shaderBufferFloat32AtomicAdd</name></member>
+            <member><type>VkBool32</type>                            <name>shaderBufferFloat64Atomics</name></member>
+            <member><type>VkBool32</type>                            <name>shaderBufferFloat64AtomicAdd</name></member>
+            <member><type>VkBool32</type>                            <name>shaderSharedFloat32Atomics</name></member>
+            <member><type>VkBool32</type>                            <name>shaderSharedFloat32AtomicAdd</name></member>
+            <member><type>VkBool32</type>                            <name>shaderSharedFloat64Atomics</name></member>
+            <member><type>VkBool32</type>                            <name>shaderSharedFloat64AtomicAdd</name></member>
+            <member><type>VkBool32</type>                            <name>shaderImageFloat32Atomics</name></member>
+            <member><type>VkBool32</type>                            <name>shaderImageFloat32AtomicAdd</name></member>
+            <member><type>VkBool32</type>                            <name>sparseImageFloat32Atomics</name></member>
+            <member><type>VkBool32</type>                            <name>sparseImageFloat32AtomicAdd</name></member>
+        </type>
         <type category="struct" name="VkPhysicalDeviceVertexAttributeDivisorFeaturesEXT" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_VERTEX_ATTRIBUTE_DIVISOR_FEATURES_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member noautovalidity="true"><type>void</type>*        <name>pNext</name></member>
+            <member optional="true"><type>void</type>*        <name>pNext</name></member>
             <member><type>VkBool32</type>                           <name>vertexAttributeInstanceRateDivisor</name></member>
             <member><type>VkBool32</type>                           <name>vertexAttributeInstanceRateZeroDivisor</name></member>
         </type>
         <type category="struct" name="VkQueueFamilyCheckpointPropertiesNV" structextends="VkQueueFamilyProperties2" returnedonly="true">
             <member values="VK_STRUCTURE_TYPE_QUEUE_FAMILY_CHECKPOINT_PROPERTIES_NV"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*           <name>pNext</name></member>
+            <member optional="true"><type>void</type>*           <name>pNext</name></member>
             <member><type>VkPipelineStageFlags</type> <name>checkpointExecutionStageMask</name></member>
         </type>
         <type category="struct" name="VkCheckpointDataNV" returnedonly="true">
             <member values="VK_STRUCTURE_TYPE_CHECKPOINT_DATA_NV"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                  <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                  <name>pNext</name></member>
             <member><type>VkPipelineStageFlagBits</type>   <name>stage</name></member>
             <member noautovalidity="true"><type>void</type>* <name>pCheckpointMarker</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceDepthStencilResolveProperties" structextends="VkPhysicalDeviceProperties2" returnedonly="true">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_DEPTH_STENCIL_RESOLVE_PROPERTIES"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                                <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                                <name>pNext</name></member>
             <member><type>VkResolveModeFlags</type>                   <name>supportedDepthResolveModes</name><comment>supported depth resolve modes</comment></member>
             <member><type>VkResolveModeFlags</type>                   <name>supportedStencilResolveModes</name><comment>supported stencil resolve modes</comment></member>
             <member><type>VkBool32</type>                             <name>independentResolveNone</name><comment>depth and stencil resolve modes can be set independently if one of them is none</comment></member>
@@ -3544,31 +3612,31 @@ typedef void <name>CAMetalLayer</name>;
         <type category="struct" name="VkPhysicalDeviceDepthStencilResolvePropertiesKHR"        alias="VkPhysicalDeviceDepthStencilResolveProperties"/>
         <type category="struct" name="VkSubpassDescriptionDepthStencilResolve" structextends="VkSubpassDescription2">
             <member values="VK_STRUCTURE_TYPE_SUBPASS_DESCRIPTION_DEPTH_STENCIL_RESOLVE"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                                              <name>pNext</name></member>
-            <member><type>VkResolveModeFlagBits</type>                                    <name>depthResolveMode</name><comment>depth resolve mode</comment></member>
-            <member><type>VkResolveModeFlagBits</type>                                    <name>stencilResolveMode</name><comment>stencil resolve mode</comment></member>
+            <member optional="true">const <type>void</type>*                              <name>pNext</name></member>
+            <member noautovalidity="true"><type>VkResolveModeFlagBits</type>              <name>depthResolveMode</name><comment>depth resolve mode</comment></member>
+            <member noautovalidity="true"><type>VkResolveModeFlagBits</type>              <name>stencilResolveMode</name><comment>stencil resolve mode</comment></member>
             <member optional="true">const <type>VkAttachmentReference2</type>*            <name>pDepthStencilResolveAttachment</name><comment>depth/stencil resolve attachment</comment></member>
         </type>
         <type category="struct" name="VkSubpassDescriptionDepthStencilResolveKHR"              alias="VkSubpassDescriptionDepthStencilResolve"/>
         <type category="struct" name="VkImageViewASTCDecodeModeEXT" structextends="VkImageViewCreateInfo">
             <member values="VK_STRUCTURE_TYPE_IMAGE_VIEW_ASTC_DECODE_MODE_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member><type>VkFormat</type>                         <name>decodeMode</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceASTCDecodeFeaturesEXT" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_ASTC_DECODE_FEATURES_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member noautovalidity="true"><type>void</type>*      <name>pNext</name></member>
+            <member optional="true"><type>void</type>*      <name>pNext</name></member>
             <member><type>VkBool32</type>                         <name>decodeModeSharedExponent</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceTransformFeedbackFeaturesEXT" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_TRANSFORM_FEEDBACK_FEATURES_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                  <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                  <name>pNext</name></member>
             <member><type>VkBool32</type>               <name>transformFeedback</name></member>
             <member><type>VkBool32</type>               <name>geometryStreams</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceTransformFeedbackPropertiesEXT" structextends="VkPhysicalDeviceProperties2" returnedonly="true">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_TRANSFORM_FEEDBACK_PROPERTIES_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                  <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                  <name>pNext</name></member>
             <member><type>uint32_t</type>               <name>maxTransformFeedbackStreams</name></member>
             <member><type>uint32_t</type>               <name>maxTransformFeedbackBuffers</name></member>
             <member><type>VkDeviceSize</type>           <name>maxTransformFeedbackBufferSize</name></member>
@@ -3582,55 +3650,55 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkPipelineRasterizationStateStreamCreateInfoEXT" structextends="VkPipelineRasterizationStateCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PIPELINE_RASTERIZATION_STATE_STREAM_CREATE_INFO_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                                                                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                                                                      <name>pNext</name></member>
             <member optional="true"><type>VkPipelineRasterizationStateStreamCreateFlagsEXT</type>                 <name>flags</name></member>
             <member><type>uint32_t</type>                                                                         <name>rasterizationStream</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceRepresentativeFragmentTestFeaturesNV" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_REPRESENTATIVE_FRAGMENT_TEST_FEATURES_NV"><type>VkStructureType</type><name>sType</name></member>
-            <member noautovalidity="true"><type>void</type>*    <name>pNext</name></member>
+            <member optional="true"><type>void</type>*    <name>pNext</name></member>
             <member><type>VkBool32</type>                       <name>representativeFragmentTest</name></member>
         </type>
         <type category="struct" name="VkPipelineRepresentativeFragmentTestStateCreateInfoNV" structextends="VkGraphicsPipelineCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PIPELINE_REPRESENTATIVE_FRAGMENT_TEST_STATE_CREATE_INFO_NV"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*    <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*    <name>pNext</name></member>
             <member><type>VkBool32</type>       <name>representativeFragmentTestEnable</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceExclusiveScissorFeaturesNV" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_EXCLUSIVE_SCISSOR_FEATURES_NV"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                            <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                            <name>pNext</name></member>
             <member><type>VkBool32</type>                         <name>exclusiveScissor</name></member>
         </type>
         <type category="struct" name="VkPipelineViewportExclusiveScissorStateCreateInfoNV" structextends="VkPipelineViewportStateCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PIPELINE_VIEWPORT_EXCLUSIVE_SCISSOR_STATE_CREATE_INFO_NV"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                                                       <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                                                       <name>pNext</name></member>
             <member optional="true"><type>uint32_t</type>                                          <name>exclusiveScissorCount</name></member>
             <member noautovalidity="true" len="exclusiveScissorCount">const <type>VkRect2D</type>* <name>pExclusiveScissors</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceCornerSampledImageFeaturesNV" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_CORNER_SAMPLED_IMAGE_FEATURES_NV"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                              <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                              <name>pNext</name></member>
             <member><type>VkBool32</type>                           <name>cornerSampledImage</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceComputeShaderDerivativesFeaturesNV" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_COMPUTE_SHADER_DERIVATIVES_FEATURES_NV"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                            <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                            <name>pNext</name></member>
             <member><type>VkBool32</type>                         <name>computeDerivativeGroupQuads</name></member>
             <member><type>VkBool32</type>                         <name>computeDerivativeGroupLinear</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceFragmentShaderBarycentricFeaturesNV" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FRAGMENT_SHADER_BARYCENTRIC_FEATURES_NV"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                            <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                            <name>pNext</name></member>
             <member><type>VkBool32</type>                         <name>fragmentShaderBarycentric</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceShaderImageFootprintFeaturesNV" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SHADER_IMAGE_FOOTPRINT_FEATURES_NV"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                              <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                              <name>pNext</name></member>
             <member><type>VkBool32</type>                           <name>imageFootprint</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceDedicatedAllocationImageAliasingFeaturesNV" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_DEDICATED_ALLOCATION_IMAGE_ALIASING_FEATURES_NV"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                            <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                            <name>pNext</name></member>
             <member><type>VkBool32</type>                         <name>dedicatedAllocationImageAliasing</name></member>
         </type>
         <type category="struct" name="VkShadingRatePaletteNV">
@@ -3639,20 +3707,20 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkPipelineViewportShadingRateImageStateCreateInfoNV" structextends="VkPipelineViewportStateCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PIPELINE_VIEWPORT_SHADING_RATE_IMAGE_STATE_CREATE_INFO_NV"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                                                             <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                                                             <name>pNext</name></member>
             <member><type>VkBool32</type>                                                                <name>shadingRateImageEnable</name></member>
-            <member noautovalidity="true"><type>uint32_t</type>                                          <name>viewportCount</name></member>
+            <member><type>uint32_t</type>                                                <name>viewportCount</name></member>
             <member noautovalidity="true" len="viewportCount">const <type>VkShadingRatePaletteNV</type>* <name>pShadingRatePalettes</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceShadingRateImageFeaturesNV" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SHADING_RATE_IMAGE_FEATURES_NV"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                               <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                               <name>pNext</name></member>
             <member><type>VkBool32</type>                            <name>shadingRateImage</name></member>
             <member><type>VkBool32</type>                            <name>shadingRateCoarseSampleOrder</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceShadingRateImagePropertiesNV" structextends="VkPhysicalDeviceProperties2" returnedonly="true">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SHADING_RATE_IMAGE_PROPERTIES_NV"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                               <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                               <name>pNext</name></member>
             <member><type>VkExtent2D</type>                          <name>shadingRateTexelSize</name></member>
             <member><type>uint32_t</type>                            <name>shadingRatePaletteSize</name></member>
             <member><type>uint32_t</type>                            <name>shadingRateMaxCoarseSamples</name></member>
@@ -3670,20 +3738,20 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkPipelineViewportCoarseSampleOrderStateCreateInfoNV" structextends="VkPipelineViewportStateCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PIPELINE_VIEWPORT_COARSE_SAMPLE_ORDER_STATE_CREATE_INFO_NV"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                                                            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                                                            <name>pNext</name></member>
             <member><type>VkCoarseSampleOrderTypeNV</type>                                              <name>sampleOrderType</name></member>
             <member optional="true"><type>uint32_t</type>                                               <name>customSampleOrderCount</name></member>
             <member len="customSampleOrderCount">const <type>VkCoarseSampleOrderCustomNV</type>*        <name>pCustomSampleOrders</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceMeshShaderFeaturesNV" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_MESH_SHADER_FEATURES_NV"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                               <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                               <name>pNext</name></member>
             <member><type>VkBool32</type>                            <name>taskShader</name></member>
             <member><type>VkBool32</type>                            <name>meshShader</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceMeshShaderPropertiesNV" returnedonly="true" structextends="VkPhysicalDeviceProperties2">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_MESH_SHADER_PROPERTIES_NV"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                               <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                               <name>pNext</name></member>
             <member><type>uint32_t</type>                            <name>maxDrawMeshTasksCount</name></member>
             <member><type>uint32_t</type>                            <name>maxTaskWorkGroupInvocations</name></member>
             <member><type>uint32_t</type>                            <name>maxTaskWorkGroupSize</name>[3]</member>
@@ -3704,7 +3772,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkRayTracingShaderGroupCreateInfoNV">
             <member values="VK_STRUCTURE_TYPE_RAY_TRACING_SHADER_GROUP_CREATE_INFO_NV"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member><type>VkRayTracingShaderGroupTypeKHR</type> <name>type</name></member>
             <member><type>uint32_t</type>               <name>generalShader</name></member>
             <member><type>uint32_t</type>               <name>closestHitShader</name></member>
@@ -3713,7 +3781,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkRayTracingShaderGroupCreateInfoKHR">
             <member values="VK_STRUCTURE_TYPE_RAY_TRACING_SHADER_GROUP_CREATE_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member><type>VkRayTracingShaderGroupTypeKHR</type> <name>type</name></member>
             <member><type>uint32_t</type>               <name>generalShader</name></member>
             <member><type>uint32_t</type>               <name>closestHitShader</name></member>
@@ -3723,7 +3791,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkRayTracingPipelineCreateInfoNV">
             <member values="VK_STRUCTURE_TYPE_RAY_TRACING_PIPELINE_CREATE_INFO_NV"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member optional="true"><type>VkPipelineCreateFlags</type>  <name>flags</name><comment>Pipeline creation flags</comment></member>
             <member><type>uint32_t</type>               <name>stageCount</name></member>
             <member len="stageCount">const <type>VkPipelineShaderStageCreateInfo</type>* <name>pStages</name><comment>One entry for each active shader stage</comment></member>
@@ -3736,22 +3804,23 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkRayTracingPipelineCreateInfoKHR">
             <member values="VK_STRUCTURE_TYPE_RAY_TRACING_PIPELINE_CREATE_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member optional="true"><type>VkPipelineCreateFlags</type>  <name>flags</name><comment>Pipeline creation flags</comment></member>
             <member optional="true"><type>uint32_t</type> <name>stageCount</name></member>
             <member len="stageCount">const <type>VkPipelineShaderStageCreateInfo</type>* <name>pStages</name><comment>One entry for each active shader stage</comment></member>
             <member optional="true"><type>uint32_t</type> <name>groupCount</name></member>
             <member len="groupCount">const <type>VkRayTracingShaderGroupCreateInfoKHR</type>* <name>pGroups</name></member>
-            <member><type>uint32_t</type>               <name>maxRecursionDepth</name></member>
-            <member><type>VkPipelineLibraryCreateInfoKHR</type> <name>libraries</name></member>
+            <member><type>uint32_t</type>               <name>maxPipelineRayRecursionDepth</name></member>
+            <member optional="true">const <type>VkPipelineLibraryCreateInfoKHR</type>* <name>pLibraryInfo</name></member>
             <member optional="true">const <type>VkRayTracingPipelineInterfaceCreateInfoKHR</type>* <name>pLibraryInterface</name></member>
+            <member optional="true">const <type>VkPipelineDynamicStateCreateInfo</type>* <name>pDynamicState</name></member>
             <member><type>VkPipelineLayout</type>       <name>layout</name><comment>Interface layout of the pipeline</comment></member>
             <member noautovalidity="true" optional="true"><type>VkPipeline</type>      <name>basePipelineHandle</name><comment>If VK_PIPELINE_CREATE_DERIVATIVE_BIT is set and this value is nonzero, it specifies the handle of the base pipeline this is a derivative of</comment></member>
             <member><type>int32_t</type>                <name>basePipelineIndex</name><comment>If VK_PIPELINE_CREATE_DERIVATIVE_BIT is set and this value is not -1, it specifies an index into pCreateInfos of the base pipeline this is a derivative of</comment></member>
         </type>
         <type category="struct" name="VkGeometryTrianglesNV">
             <member values="VK_STRUCTURE_TYPE_GEOMETRY_TRIANGLES_NV"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                <name>pNext</name></member>
             <member optional="true"><type>VkBuffer</type>   <name>vertexData</name></member>
             <member><type>VkDeviceSize</type>               <name>vertexOffset</name></member>
             <member><type>uint32_t</type>                   <name>vertexCount</name></member>
@@ -3766,7 +3835,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkGeometryAABBNV">
             <member values="VK_STRUCTURE_TYPE_GEOMETRY_AABB_NV"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                <name>pNext</name></member>
             <member optional="true"><type>VkBuffer</type>   <name>aabbData</name></member>
             <member><type>uint32_t</type>                   <name>numAABBs</name></member>
             <member><type>uint32_t</type>                   <name>stride</name><comment>Stride in bytes between AABBs</comment></member>
@@ -3778,14 +3847,14 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkGeometryNV">
             <member values="VK_STRUCTURE_TYPE_GEOMETRY_NV"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                                   <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                                   <name>pNext</name></member>
             <member><type>VkGeometryTypeKHR</type>                  <name>geometryType</name></member>
             <member><type>VkGeometryDataNV</type>                              <name>geometry</name></member>
             <member optional="true"><type>VkGeometryFlagsKHR</type> <name>flags</name></member>
         </type>
         <type category="struct" name="VkAccelerationStructureInfoNV">
             <member values="VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_INFO_NV"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                            <name>pNext</name></member>
             <member><type>VkAccelerationStructureTypeNV</type>         <name>type</name></member>
             <member optional="true"><type>VkBuildAccelerationStructureFlagsNV</type><name>flags</name></member>
             <member optional="true"><type>uint32_t</type>               <name>instanceCount</name></member>
@@ -3794,69 +3863,87 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkAccelerationStructureCreateInfoNV">
             <member values="VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_CREATE_INFO_NV"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                            <name>pNext</name></member>
             <member><type>VkDeviceSize</type>                           <name>compactedSize</name></member>
             <member><type>VkAccelerationStructureInfoNV</type>          <name>info</name></member>
         </type>
-        <type category="struct" name="VkBindAccelerationStructureMemoryInfoKHR">
-            <member values="VK_STRUCTURE_TYPE_BIND_ACCELERATION_STRUCTURE_MEMORY_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
-            <member><type>VkAccelerationStructureKHR</type>       <name>accelerationStructure</name></member>
+        <type category="struct" name="VkBindAccelerationStructureMemoryInfoNV">
+            <member values="VK_STRUCTURE_TYPE_BIND_ACCELERATION_STRUCTURE_MEMORY_INFO_NV"><type>VkStructureType</type> <name>sType</name></member>
+            <member optional="true">const <type>void</type>*     <name>pNext</name></member>
+            <member><type>VkAccelerationStructureNV</type>       <name>accelerationStructure</name></member>
             <member><type>VkDeviceMemory</type>                   <name>memory</name></member>
             <member><type>VkDeviceSize</type>                     <name>memoryOffset</name></member>
             <member optional="true"><type>uint32_t</type>         <name>deviceIndexCount</name></member>
             <member len="deviceIndexCount">const <type>uint32_t</type>*  <name>pDeviceIndices</name></member>
         </type>
-        <type category="struct" name="VkBindAccelerationStructureMemoryInfoNV"                 alias="VkBindAccelerationStructureMemoryInfoKHR"/>
         <type category="struct" name="VkWriteDescriptorSetAccelerationStructureKHR" structextends="VkWriteDescriptorSet">
             <member values="VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET_ACCELERATION_STRUCTURE_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member><type>uint32_t</type>                         <name>accelerationStructureCount</name></member>
-            <member len="accelerationStructureCount">const <type>VkAccelerationStructureKHR</type>* <name>pAccelerationStructures</name></member>
+            <member optional="false,true" len="accelerationStructureCount">const <type>VkAccelerationStructureKHR</type>* <name>pAccelerationStructures</name></member>
         </type>
-        <type category="struct" name="VkWriteDescriptorSetAccelerationStructureNV"             alias="VkWriteDescriptorSetAccelerationStructureKHR"/>
-        <type category="struct" name="VkAccelerationStructureMemoryRequirementsInfoKHR">
-            <member values="VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_MEMORY_REQUIREMENTS_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                                                          <name>pNext</name></member>
-            <member><type>VkAccelerationStructureMemoryRequirementsTypeKHR</type>                     <name>type</name></member>
-            <member><type>VkAccelerationStructureBuildTypeKHR</type>                                  <name>buildType</name></member>
-            <member><type>VkAccelerationStructureKHR</type>                                           <name>accelerationStructure</name></member>
+        <type category="struct" name="VkWriteDescriptorSetAccelerationStructureNV" structextends="VkWriteDescriptorSet">
+            <member values="VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET_ACCELERATION_STRUCTURE_NV"><type>VkStructureType</type> <name>sType</name></member>
+            <member optional="true">const <type>void</type>*      <name>pNext</name></member>
+            <member><type>uint32_t</type>                         <name>accelerationStructureCount</name></member>
+            <member optional="false,true" len="accelerationStructureCount">const <type>VkAccelerationStructureNV</type>* <name>pAccelerationStructures</name></member>
         </type>
         <type category="struct" name="VkAccelerationStructureMemoryRequirementsInfoNV">
             <member values="VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_MEMORY_REQUIREMENTS_INFO_NV"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                                                          <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                                                          <name>pNext</name></member>
             <member><type>VkAccelerationStructureMemoryRequirementsTypeNV</type>                     <name>type</name></member>
             <member><type>VkAccelerationStructureNV</type>                                           <name>accelerationStructure</name></member>
         </type>
-        <type category="struct" name="VkPhysicalDeviceRayTracingFeaturesKHR" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
-            <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_RAY_TRACING_FEATURES_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                            <name>pNext</name></member>
-            <member><type>VkBool32</type>                         <name>rayTracing</name></member>
-            <member><type>VkBool32</type>                         <name>rayTracingShaderGroupHandleCaptureReplay</name></member>
-            <member><type>VkBool32</type>                         <name>rayTracingShaderGroupHandleCaptureReplayMixed</name></member>
-            <member><type>VkBool32</type>                         <name>rayTracingAccelerationStructureCaptureReplay</name></member>
-            <member><type>VkBool32</type>                         <name>rayTracingIndirectTraceRays</name></member>
-            <member><type>VkBool32</type>                         <name>rayTracingIndirectAccelerationStructureBuild</name></member>
-            <member><type>VkBool32</type>                         <name>rayTracingHostAccelerationStructureCommands</name></member>
-            <member><type>VkBool32</type>                         <name>rayQuery</name></member>
-            <member><type>VkBool32</type>                         <name>rayTracingPrimitiveCulling</name></member>
+        <type category="struct" name="VkPhysicalDeviceAccelerationStructureFeaturesKHR" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
+            <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_ACCELERATION_STRUCTURE_FEATURES_KHR"><type>VkStructureType</type> <name>sType</name></member>
+            <member optional="true"><type>void</type>*                            <name>pNext</name></member>
+            <member><type>VkBool32</type>                         <name>accelerationStructure</name></member>
+            <member><type>VkBool32</type>                         <name>accelerationStructureCaptureReplay</name></member>
+            <member><type>VkBool32</type>                         <name>accelerationStructureIndirectBuild</name></member>
+            <member><type>VkBool32</type>                         <name>accelerationStructureHostCommands</name></member>
+            <member><type>VkBool32</type>                         <name>descriptorBindingAccelerationStructureUpdateAfterBind</name></member>
         </type>
-        <type category="struct" name="VkPhysicalDeviceRayTracingPropertiesKHR" returnedonly="true" structextends="VkPhysicalDeviceProperties2">
-            <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_RAY_TRACING_PROPERTIES_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                            <name>pNext</name></member>
-            <member><type>uint32_t</type>                         <name>shaderGroupHandleSize</name></member>
-            <member><type>uint32_t</type>                         <name>maxRecursionDepth</name></member>
-            <member><type>uint32_t</type>                         <name>maxShaderGroupStride</name></member>
-            <member><type>uint32_t</type>                         <name>shaderGroupBaseAlignment</name></member>
+        <type category="struct" name="VkPhysicalDeviceRayTracingPipelineFeaturesKHR" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
+            <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_RAY_TRACING_PIPELINE_FEATURES_KHR"><type>VkStructureType</type> <name>sType</name></member>
+            <member optional="true"><type>void</type>*            <name>pNext</name></member>
+            <member><type>VkBool32</type>                         <name>rayTracingPipeline</name></member>
+            <member><type>VkBool32</type>                         <name>rayTracingPipelineShaderGroupHandleCaptureReplay</name></member>
+            <member><type>VkBool32</type>                         <name>rayTracingPipelineShaderGroupHandleCaptureReplayMixed</name></member>
+            <member><type>VkBool32</type>                         <name>rayTracingPipelineTraceRaysIndirect</name></member>
+            <member><type>VkBool32</type>                         <name>rayTraversalPrimitiveCulling</name></member>
+        </type>
+        <type category="struct" name="VkPhysicalDeviceRayQueryFeaturesKHR" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
+            <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_RAY_QUERY_FEATURES_KHR"><type>VkStructureType</type> <name>sType</name></member>
+            <member optional="true"><type>void</type>*            <name>pNext</name></member>
+            <member><type>VkBool32</type>                         <name>rayQuery</name></member>
+        </type>
+        <type category="struct" name="VkPhysicalDeviceAccelerationStructurePropertiesKHR" returnedonly="true" structextends="VkPhysicalDeviceProperties2">
+            <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_ACCELERATION_STRUCTURE_PROPERTIES_KHR"><type>VkStructureType</type> <name>sType</name></member>
+            <member optional="true"><type>void</type>*            <name>pNext</name></member>
             <member><type>uint64_t</type>                         <name>maxGeometryCount</name></member>
             <member><type>uint64_t</type>                         <name>maxInstanceCount</name></member>
             <member><type>uint64_t</type>                         <name>maxPrimitiveCount</name></member>
+            <member><type>uint32_t</type>                         <name>maxPerStageDescriptorAccelerationStructures</name></member>
+            <member><type>uint32_t</type>                         <name>maxPerStageDescriptorUpdateAfterBindAccelerationStructures</name></member>
             <member><type>uint32_t</type>                         <name>maxDescriptorSetAccelerationStructures</name></member>
+            <member><type>uint32_t</type>                         <name>maxDescriptorSetUpdateAfterBindAccelerationStructures</name></member>
+            <member><type>uint32_t</type>                         <name>minAccelerationStructureScratchOffsetAlignment</name></member>
+        </type>
+        <type category="struct" name="VkPhysicalDeviceRayTracingPipelinePropertiesKHR" returnedonly="true" structextends="VkPhysicalDeviceProperties2">
+            <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_RAY_TRACING_PIPELINE_PROPERTIES_KHR"><type>VkStructureType</type> <name>sType</name></member>
+            <member optional="true"><type>void</type>*            <name>pNext</name></member>
+            <member><type>uint32_t</type>                         <name>shaderGroupHandleSize</name></member>
+            <member><type>uint32_t</type>                         <name>maxRayRecursionDepth</name></member>
+            <member><type>uint32_t</type>                         <name>maxShaderGroupStride</name></member>
+            <member><type>uint32_t</type>                         <name>shaderGroupBaseAlignment</name></member>
             <member><type>uint32_t</type>                         <name>shaderGroupHandleCaptureReplaySize</name></member>
+            <member><type>uint32_t</type>                         <name>maxRayDispatchInvocationCount</name></member>
+            <member><type>uint32_t</type>                         <name>shaderGroupHandleAlignment</name></member>
+            <member><type>uint32_t</type>                         <name>maxRayHitAttributeSize</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceRayTracingPropertiesNV" returnedonly="true" structextends="VkPhysicalDeviceProperties2">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_RAY_TRACING_PROPERTIES_NV"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                            <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                            <name>pNext</name></member>
             <member><type>uint32_t</type>                         <name>shaderGroupHandleSize</name></member>
             <member><type>uint32_t</type>                         <name>maxRecursionDepth</name></member>
             <member><type>uint32_t</type>                         <name>maxShaderGroupStride</name></member>
@@ -3866,9 +3953,8 @@ typedef void <name>CAMetalLayer</name>;
             <member><type>uint64_t</type>                         <name>maxTriangleCount</name></member>
             <member><type>uint32_t</type>                         <name>maxDescriptorSetAccelerationStructures</name></member>
         </type>
-        <type category="struct" name="VkStridedBufferRegionKHR">
-            <member optional="true"><type>VkBuffer</type>         <name>buffer</name></member>
-            <member><type>VkDeviceSize</type>                     <name>offset</name></member>
+        <type category="struct" name="VkStridedDeviceAddressRegionKHR">
+            <member optional="true"><type>VkDeviceAddress</type>  <name>deviceAddress</name></member>
             <member><type>VkDeviceSize</type>                     <name>stride</name></member>
             <member><type>VkDeviceSize</type>                     <name>size</name></member>
         </type>
@@ -3879,7 +3965,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkDrmFormatModifierPropertiesListEXT" returnedonly="true" structextends="VkFormatProperties2">
             <member values="VK_STRUCTURE_TYPE_DRM_FORMAT_MODIFIER_PROPERTIES_LIST_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>* <name>pNext</name></member>
+            <member optional="true"><type>void</type>* <name>pNext</name></member>
             <member optional="true"><type>uint32_t</type> <name>drmFormatModifierCount</name></member>
             <member optional="true,false" len="drmFormatModifierCount"><type>VkDrmFormatModifierPropertiesEXT</type>* <name>pDrmFormatModifierProperties</name></member>
         </type>
@@ -3890,7 +3976,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkPhysicalDeviceImageDrmFormatModifierInfoEXT" structextends="VkPhysicalDeviceImageFormatInfo2">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_IMAGE_DRM_FORMAT_MODIFIER_INFO_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>* <name>pNext</name></member>
+            <member optional="true">const <type>void</type>* <name>pNext</name></member>
             <member><type>uint64_t</type> <name>drmFormatModifier</name></member>
             <member><type>VkSharingMode</type> <name>sharingMode</name></member>
             <member optional="true"><type>uint32_t</type> <name>queueFamilyIndexCount</name></member>
@@ -3898,99 +3984,112 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkImageDrmFormatModifierListCreateInfoEXT" structextends="VkImageCreateInfo">
             <member values="VK_STRUCTURE_TYPE_IMAGE_DRM_FORMAT_MODIFIER_LIST_CREATE_INFO_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>* <name>pNext</name></member>
+            <member optional="true">const <type>void</type>* <name>pNext</name></member>
             <member><type>uint32_t</type> <name>drmFormatModifierCount</name></member>
             <member len="drmFormatModifierCount">const <type>uint64_t</type>* <name>pDrmFormatModifiers</name></member>
         </type>
         <type category="struct" name="VkImageDrmFormatModifierExplicitCreateInfoEXT" structextends="VkImageCreateInfo">
             <member values="VK_STRUCTURE_TYPE_IMAGE_DRM_FORMAT_MODIFIER_EXPLICIT_CREATE_INFO_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>* <name>pNext</name></member>
+            <member optional="true">const <type>void</type>* <name>pNext</name></member>
             <member><type>uint64_t</type> <name>drmFormatModifier</name></member>
             <member optional="false"><type>uint32_t</type> <name>drmFormatModifierPlaneCount</name></member>
             <member len="drmFormatModifierPlaneCount">const <type>VkSubresourceLayout</type>* <name>pPlaneLayouts</name></member>
         </type>
         <type category="struct" name="VkImageDrmFormatModifierPropertiesEXT" returnedonly="true">
             <member values="VK_STRUCTURE_TYPE_IMAGE_DRM_FORMAT_MODIFIER_PROPERTIES_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>* <name>pNext</name></member>
+            <member optional="true"><type>void</type>* <name>pNext</name></member>
             <member><type>uint64_t</type> <name>drmFormatModifier</name></member>
         </type>
         <type category="struct" name="VkImageStencilUsageCreateInfo" structextends="VkImageCreateInfo,VkPhysicalDeviceImageFormatInfo2">
             <member values="VK_STRUCTURE_TYPE_IMAGE_STENCIL_USAGE_CREATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>* <name>pNext</name></member>
+            <member optional="true">const <type>void</type>* <name>pNext</name></member>
             <member><type>VkImageUsageFlags</type> <name>stencilUsage</name></member>
         </type>
         <type category="struct" name="VkImageStencilUsageCreateInfoEXT"                        alias="VkImageStencilUsageCreateInfo"/>
         <type category="struct" name="VkDeviceMemoryOverallocationCreateInfoAMD"  structextends="VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_DEVICE_MEMORY_OVERALLOCATION_CREATE_INFO_AMD"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member><type>VkMemoryOverallocationBehaviorAMD</type> <name>overallocationBehavior</name></member>
         </type>
-        <type category="struct" name="VkPhysicalDeviceFragmentDensityMapFeaturesEXT" returnedonly="true" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
+        <type category="struct" name="VkPhysicalDeviceFragmentDensityMapFeaturesEXT" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FRAGMENT_DENSITY_MAP_FEATURES_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                            <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                            <name>pNext</name></member>
             <member><type>VkBool32</type>                         <name>fragmentDensityMap</name></member>
             <member><type>VkBool32</type>                         <name>fragmentDensityMapDynamic</name></member>
             <member><type>VkBool32</type>                         <name>fragmentDensityMapNonSubsampledImages</name></member>
         </type>
+        <type category="struct" name="VkPhysicalDeviceFragmentDensityMap2FeaturesEXT" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
+            <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FRAGMENT_DENSITY_MAP_2_FEATURES_EXT"><type>VkStructureType</type> <name>sType</name></member>
+            <member optional="true"><type>void</type>*                            <name>pNext</name></member>
+            <member><type>VkBool32</type>                         <name>fragmentDensityMapDeferred</name></member>
+        </type>
         <type category="struct" name="VkPhysicalDeviceFragmentDensityMapPropertiesEXT" returnedonly="true" structextends="VkPhysicalDeviceProperties2">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FRAGMENT_DENSITY_MAP_PROPERTIES_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                            <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                            <name>pNext</name></member>
             <member><type>VkExtent2D</type>                       <name>minFragmentDensityTexelSize</name></member>
             <member><type>VkExtent2D</type>                       <name>maxFragmentDensityTexelSize</name></member>
             <member><type>VkBool32</type>                         <name>fragmentDensityInvocations</name></member>
         </type>
+        <type category="struct" name="VkPhysicalDeviceFragmentDensityMap2PropertiesEXT" returnedonly="true" structextends="VkPhysicalDeviceProperties2">
+            <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FRAGMENT_DENSITY_MAP_2_PROPERTIES_EXT"><type>VkStructureType</type> <name>sType</name></member>
+            <member optional="true"><type>void</type>*                          <name>pNext</name></member>
+            <member><type>VkBool32</type>                       <name>subsampledLoads</name></member>
+            <member><type>VkBool32</type>                       <name>subsampledCoarseReconstructionEarlyAccess</name></member>
+            <member><type>uint32_t</type>                       <name>maxSubsampledArrayLayers</name></member>
+            <member><type>uint32_t</type>                       <name>maxDescriptorSetSubsampledSamplers</name></member>
+        </type>
         <type category="struct" name="VkRenderPassFragmentDensityMapCreateInfoEXT" structextends="VkRenderPassCreateInfo,VkRenderPassCreateInfo2">
             <member values="VK_STRUCTURE_TYPE_RENDER_PASS_FRAGMENT_DENSITY_MAP_CREATE_INFO_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member><type>VkAttachmentReference</type>            <name>fragmentDensityMapAttachment</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceScalarBlockLayoutFeatures" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SCALAR_BLOCK_LAYOUT_FEATURES"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                               <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                               <name>pNext</name></member>
             <member><type>VkBool32</type>                            <name>scalarBlockLayout</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceScalarBlockLayoutFeaturesEXT"            alias="VkPhysicalDeviceScalarBlockLayoutFeatures"/>
         <type category="struct" name="VkSurfaceProtectedCapabilitiesKHR" structextends="VkSurfaceCapabilities2KHR">
             <member values="VK_STRUCTURE_TYPE_SURFACE_PROTECTED_CAPABILITIES_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>* <name>pNext</name></member>
+            <member optional="true">const <type>void</type>* <name>pNext</name></member>
             <member><type>VkBool32</type> <name>supportsProtected</name><comment>Represents if surface can be protected</comment></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceUniformBufferStandardLayoutFeatures" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_UNIFORM_BUFFER_STANDARD_LAYOUT_FEATURES"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                               <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                               <name>pNext</name></member>
             <member><type>VkBool32</type>                            <name>uniformBufferStandardLayout</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceUniformBufferStandardLayoutFeaturesKHR"  alias="VkPhysicalDeviceUniformBufferStandardLayoutFeatures"/>
         <type category="struct" name="VkPhysicalDeviceDepthClipEnableFeaturesEXT" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_DEPTH_CLIP_ENABLE_FEATURES_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                  <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                  <name>pNext</name></member>
             <member><type>VkBool32</type>               <name>depthClipEnable</name></member>
         </type>
         <type category="struct" name="VkPipelineRasterizationDepthClipStateCreateInfoEXT" structextends="VkPipelineRasterizationStateCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PIPELINE_RASTERIZATION_DEPTH_CLIP_STATE_CREATE_INFO_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                                                                 <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                                                                 <name>pNext</name></member>
             <member optional="true"><type>VkPipelineRasterizationDepthClipStateCreateFlagsEXT</type>         <name>flags</name><comment>Reserved</comment></member>
             <member><type>VkBool32</type>                                                                    <name>depthClipEnable</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceMemoryBudgetPropertiesEXT" structextends="VkPhysicalDeviceMemoryProperties2" returnedonly="true">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_MEMORY_BUDGET_PROPERTIES_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member noautovalidity="true"><type>void</type>*        <name>pNext</name></member>
+            <member optional="true"><type>void</type>*        <name>pNext</name></member>
             <member><type>VkDeviceSize</type>                       <name>heapBudget</name>[<enum>VK_MAX_MEMORY_HEAPS</enum>]</member>
             <member><type>VkDeviceSize</type>                       <name>heapUsage</name>[<enum>VK_MAX_MEMORY_HEAPS</enum>]</member>
         </type>
         <type category="struct" name="VkPhysicalDeviceMemoryPriorityFeaturesEXT" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_MEMORY_PRIORITY_FEATURES_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member noautovalidity="true"><type>void</type>*        <name>pNext</name></member>
+            <member optional="true"><type>void</type>*        <name>pNext</name></member>
             <member><type>VkBool32</type>                           <name>memoryPriority</name></member>
         </type>
         <type category="struct" name="VkMemoryPriorityAllocateInfoEXT" structextends="VkMemoryAllocateInfo">
             <member values="VK_STRUCTURE_TYPE_MEMORY_PRIORITY_ALLOCATE_INFO_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                        <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                        <name>pNext</name></member>
             <member><type>float</type>                              <name>priority</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceBufferDeviceAddressFeatures" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_BUFFER_DEVICE_ADDRESS_FEATURES"><type>VkStructureType</type> <name>sType</name></member>
-            <member noautovalidity="true"><type>void</type>*        <name>pNext</name></member>
+            <member optional="true"><type>void</type>*        <name>pNext</name></member>
             <member><type>VkBool32</type>                           <name>bufferDeviceAddress</name></member>
             <member><type>VkBool32</type>                           <name>bufferDeviceAddressCaptureReplay</name></member>
             <member><type>VkBool32</type>                           <name>bufferDeviceAddressMultiDevice</name></member>
@@ -3998,7 +4097,7 @@ typedef void <name>CAMetalLayer</name>;
         <type category="struct" name="VkPhysicalDeviceBufferDeviceAddressFeaturesKHR"          alias="VkPhysicalDeviceBufferDeviceAddressFeatures"/>
         <type category="struct" name="VkPhysicalDeviceBufferDeviceAddressFeaturesEXT" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_BUFFER_DEVICE_ADDRESS_FEATURES_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member noautovalidity="true"><type>void</type>*        <name>pNext</name></member>
+            <member optional="true"><type>void</type>*        <name>pNext</name></member>
             <member><type>VkBool32</type>                           <name>bufferDeviceAddress</name></member>
             <member><type>VkBool32</type>                           <name>bufferDeviceAddressCaptureReplay</name></member>
             <member><type>VkBool32</type>                           <name>bufferDeviceAddressMultiDevice</name></member>
@@ -4006,49 +4105,49 @@ typedef void <name>CAMetalLayer</name>;
         <type category="struct" name="VkPhysicalDeviceBufferAddressFeaturesEXT"                alias="VkPhysicalDeviceBufferDeviceAddressFeaturesEXT"/>
         <type category="struct" name="VkBufferDeviceAddressInfo">
             <member values="VK_STRUCTURE_TYPE_BUFFER_DEVICE_ADDRESS_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                                            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                                            <name>pNext</name></member>
             <member><type>VkBuffer</type>                                               <name>buffer</name></member>
         </type>
         <type category="struct" name="VkBufferDeviceAddressInfoKHR"                            alias="VkBufferDeviceAddressInfo"/>
         <type category="struct" name="VkBufferDeviceAddressInfoEXT"                            alias="VkBufferDeviceAddressInfo"/>
         <type category="struct" name="VkBufferOpaqueCaptureAddressCreateInfo" structextends="VkBufferCreateInfo">
             <member values="VK_STRUCTURE_TYPE_BUFFER_OPAQUE_CAPTURE_ADDRESS_CREATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member><type>uint64_t</type>                         <name>opaqueCaptureAddress</name></member>
         </type>
         <type category="struct" name="VkBufferOpaqueCaptureAddressCreateInfoKHR"               alias="VkBufferOpaqueCaptureAddressCreateInfo"/>
         <type category="struct" name="VkBufferDeviceAddressCreateInfoEXT" structextends="VkBufferCreateInfo">
             <member values="VK_STRUCTURE_TYPE_BUFFER_DEVICE_ADDRESS_CREATE_INFO_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member><type>VkDeviceAddress</type>                  <name>deviceAddress</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceImageViewImageFormatInfoEXT" structextends="VkPhysicalDeviceImageFormatInfo2">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_IMAGE_VIEW_IMAGE_FORMAT_INFO_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                            <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                            <name>pNext</name></member>
             <member><type>VkImageViewType</type>                  <name>imageViewType</name></member>
         </type>
         <type category="struct" name="VkFilterCubicImageViewImageFormatPropertiesEXT" returnedonly="true" structextends="VkImageFormatProperties2">
             <member values="VK_STRUCTURE_TYPE_FILTER_CUBIC_IMAGE_VIEW_IMAGE_FORMAT_PROPERTIES_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                            <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                            <name>pNext</name></member>
             <member><type>VkBool32</type>                         <name>filterCubic</name><comment>The combinations of format, image type (and image view type if provided) can be filtered with VK_FILTER_CUBIC_EXT</comment></member>
             <member><type>VkBool32</type>                         <name>filterCubicMinmax</name><comment>The combination of format, image type (and image view type if provided) can be filtered with VK_FILTER_CUBIC_EXT and ReductionMode of Min or Max</comment></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceImagelessFramebufferFeatures" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_IMAGELESS_FRAMEBUFFER_FEATURES"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                                    <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                                    <name>pNext</name></member>
             <member><type>VkBool32</type>                                 <name>imagelessFramebuffer</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceImagelessFramebufferFeaturesKHR"         alias="VkPhysicalDeviceImagelessFramebufferFeatures"/>
         <type category="struct" name="VkFramebufferAttachmentsCreateInfo" structextends="VkFramebufferCreateInfo">
             <member values="VK_STRUCTURE_TYPE_FRAMEBUFFER_ATTACHMENTS_CREATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                              <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                              <name>pNext</name></member>
             <member optional="true"><type>uint32_t</type>                 <name>attachmentImageInfoCount</name></member>
             <member len="attachmentImageInfoCount">const <type>VkFramebufferAttachmentImageInfo</type>* <name>pAttachmentImageInfos</name></member>
         </type>
         <type category="struct" name="VkFramebufferAttachmentsCreateInfoKHR"                   alias="VkFramebufferAttachmentsCreateInfo"/>
         <type category="struct" name="VkFramebufferAttachmentImageInfo">
             <member values="VK_STRUCTURE_TYPE_FRAMEBUFFER_ATTACHMENT_IMAGE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                              <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                              <name>pNext</name></member>
             <member optional="true"><type>VkImageCreateFlags</type>       <name>flags</name><comment>Image creation flags</comment></member>
             <member><type>VkImageUsageFlags</type>                        <name>usage</name><comment>Image usage flags</comment></member>
             <member><type>uint32_t</type>                                 <name>width</name></member>
@@ -4060,30 +4159,30 @@ typedef void <name>CAMetalLayer</name>;
         <type category="struct" name="VkFramebufferAttachmentImageInfoKHR"                     alias="VkFramebufferAttachmentImageInfo"/>
         <type category="struct" name="VkRenderPassAttachmentBeginInfo" structextends="VkRenderPassBeginInfo">
             <member values="VK_STRUCTURE_TYPE_RENDER_PASS_ATTACHMENT_BEGIN_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                              <name>pNext</name></member>             <!-- Pointer to next structure -->
+            <member optional="true">const <type>void</type>*                              <name>pNext</name></member>             <!-- Pointer to next structure -->
             <member optional="true"><type>uint32_t</type>                 <name>attachmentCount</name></member>
             <member len="attachmentCount">const <type>VkImageView</type>* <name>pAttachments</name></member>
         </type>
         <type category="struct" name="VkRenderPassAttachmentBeginInfoKHR"                      alias="VkRenderPassAttachmentBeginInfo"/>
         <type category="struct" name="VkPhysicalDeviceTextureCompressionASTCHDRFeaturesEXT" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_TEXTURE_COMPRESSION_ASTC_HDR_FEATURES_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                  <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                  <name>pNext</name></member>
             <member><type>VkBool32</type>               <name>textureCompressionASTC_HDR</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceCooperativeMatrixFeaturesNV" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_COOPERATIVE_MATRIX_FEATURES_NV"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                               <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                               <name>pNext</name></member>
             <member><type>VkBool32</type>                            <name>cooperativeMatrix</name></member>
             <member><type>VkBool32</type>                            <name>cooperativeMatrixRobustBufferAccess</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceCooperativeMatrixPropertiesNV" returnedonly="true" structextends="VkPhysicalDeviceProperties2">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_COOPERATIVE_MATRIX_PROPERTIES_NV"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                               <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                               <name>pNext</name></member>
             <member><type>VkShaderStageFlags</type>                  <name>cooperativeMatrixSupportedStages</name></member>
         </type>
         <type category="struct" name="VkCooperativeMatrixPropertiesNV">
             <member values="VK_STRUCTURE_TYPE_COOPERATIVE_MATRIX_PROPERTIES_NV"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                               <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                               <name>pNext</name></member>
             <member><type>uint32_t</type>                            <name>MSize</name></member>
             <member><type>uint32_t</type>                            <name>NSize</name></member>
             <member><type>uint32_t</type>                            <name>KSize</name></member>
@@ -4095,25 +4194,25 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkPhysicalDeviceYcbcrImageArraysFeaturesEXT" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_YCBCR_IMAGE_ARRAYS_FEATURES_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member noautovalidity="true"><type>void</type>*        <name>pNext</name></member>
+            <member optional="true"><type>void</type>*        <name>pNext</name></member>
             <member><type>VkBool32</type>                           <name>ycbcrImageArrays</name></member>
         </type>
         <type category="struct" name="VkImageViewHandleInfoNVX">
             <member values="VK_STRUCTURE_TYPE_IMAGE_VIEW_HANDLE_INFO_NVX"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member><type>VkImageView</type>                         <name>imageView</name></member>
             <member><type>VkDescriptorType</type>                    <name>descriptorType</name></member>
             <member optional="true"><type>VkSampler</type>           <name>sampler</name></member>
         </type>
         <type category="struct" name="VkImageViewAddressPropertiesNVX" returnedonly="true">
             <member values="VK_STRUCTURE_TYPE_IMAGE_VIEW_ADDRESS_PROPERTIES_NVX"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*              <name>pNext</name></member>
+            <member optional="true"><type>void</type>*              <name>pNext</name></member>
             <member><type>VkDeviceAddress</type>    <name>deviceAddress</name></member>
             <member><type>VkDeviceSize</type>       <name>size</name></member>
         </type>
         <type category="struct" name="VkPresentFrameTokenGGP" structextends="VkPresentInfoKHR">
             <member values="VK_STRUCTURE_TYPE_PRESENT_FRAME_TOKEN_GGP"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member><type>GgpFrameToken</type>                    <name>frameToken</name></member>
         </type>
         <type category="struct" name="VkPipelineCreationFeedbackEXT" returnedonly="true">
@@ -4122,39 +4221,40 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkPipelineCreationFeedbackCreateInfoEXT" structextends="VkGraphicsPipelineCreateInfo,VkComputePipelineCreateInfo,VkRayTracingPipelineCreateInfoNV,VkRayTracingPipelineCreateInfoKHR">
             <member values="VK_STRUCTURE_TYPE_PIPELINE_CREATION_FEEDBACK_CREATE_INFO_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                         <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                         <name>pNext</name></member>
             <member><type>VkPipelineCreationFeedbackEXT</type>*      <name>pPipelineCreationFeedback</name><comment>Output pipeline creation feedback.</comment></member>
             <member><type>uint32_t</type>                            <name>pipelineStageCreationFeedbackCount</name></member>
             <member len="pipelineStageCreationFeedbackCount"><type>VkPipelineCreationFeedbackEXT</type>* <name>pPipelineStageCreationFeedbacks</name><comment>One entry for each shader stage specified in the parent Vk*PipelineCreateInfo struct</comment></member>
         </type>
         <type category="struct" name="VkSurfaceFullScreenExclusiveInfoEXT" structextends="VkPhysicalDeviceSurfaceInfo2KHR,VkSwapchainCreateInfoKHR">
             <member values="VK_STRUCTURE_TYPE_SURFACE_FULL_SCREEN_EXCLUSIVE_INFO_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                            <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                            <name>pNext</name></member>
             <member><type>VkFullScreenExclusiveEXT</type>         <name>fullScreenExclusive</name></member>
         </type>
         <type category="struct" name="VkSurfaceFullScreenExclusiveWin32InfoEXT" structextends="VkPhysicalDeviceSurfaceInfo2KHR,VkSwapchainCreateInfoKHR">
             <member values="VK_STRUCTURE_TYPE_SURFACE_FULL_SCREEN_EXCLUSIVE_WIN32_INFO_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*      <name>pNext</name></member>
             <member><type>HMONITOR</type>         <name>hmonitor</name></member>
         </type>
         <type category="struct" name="VkSurfaceCapabilitiesFullScreenExclusiveEXT" structextends="VkSurfaceCapabilities2KHR">
             <member values="VK_STRUCTURE_TYPE_SURFACE_CAPABILITIES_FULL_SCREEN_EXCLUSIVE_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*            <name>pNext</name></member>
+            <member optional="true"><type>void</type>*            <name>pNext</name></member>
             <member><type>VkBool32</type>         <name>fullScreenExclusiveSupported</name></member>
         </type>
         <type category="struct" name="VkPhysicalDevicePerformanceQueryFeaturesKHR" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_PERFORMANCE_QUERY_FEATURES_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member noautovalidity="true"><type>void</type>*      <name>pNext</name></member>
+            <member optional="true"><type>void</type>*      <name>pNext</name></member>
             <member><type>VkBool32</type>                         <name>performanceCounterQueryPools</name><comment>performance counters supported in query pools</comment></member>
-            <member><type>VkBool32</type>                         <name>performanceCounterMultipleQueryPools</name><comment>performance counters from multiple query pools can be accessed in the same primary command buffer</comment></member>        </type>
+            <member><type>VkBool32</type>                         <name>performanceCounterMultipleQueryPools</name><comment>performance counters from multiple query pools can be accessed in the same primary command buffer</comment></member>
+        </type>
         <type category="struct" name="VkPhysicalDevicePerformanceQueryPropertiesKHR" returnedonly="true" structextends="VkPhysicalDeviceProperties2">
-             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_PERFORMANCE_QUERY_PROPERTIES_KHR"><type>VkStructureType</type> <name>sType</name></member>
-             <member><type>void</type>* <name>pNext</name></member>
-             <member noautovalidity="true"><type>VkBool32</type> <name>allowCommandBufferQueryCopies</name><comment>Flag to specify whether performance queries are allowed to be used in vkCmdCopyQueryPoolResults</comment></member>
+            <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_PERFORMANCE_QUERY_PROPERTIES_KHR"><type>VkStructureType</type> <name>sType</name></member>
+            <member optional="true"><type>void</type>* <name>pNext</name></member>
+            <member noautovalidity="true"><type>VkBool32</type> <name>allowCommandBufferQueryCopies</name><comment>Flag to specify whether performance queries are allowed to be used in vkCmdCopyQueryPoolResults</comment></member>
         </type>
         <type category="struct" name="VkPerformanceCounterKHR" returnedonly="true">
             <member values="VK_STRUCTURE_TYPE_PERFORMANCE_COUNTER_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                             <name>pNext</name></member> <!-- Pointer to next structure -->
+            <member optional="true">const <type>void</type>*                             <name>pNext</name></member> <!-- Pointer to next structure -->
             <member><type>VkPerformanceCounterUnitKHR</type>        <name>unit</name></member>
             <member><type>VkPerformanceCounterScopeKHR</type>       <name>scope</name></member>
             <member><type>VkPerformanceCounterStorageKHR</type>     <name>storage</name></member>
@@ -4162,7 +4262,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkPerformanceCounterDescriptionKHR" returnedonly="true">
             <member values="VK_STRUCTURE_TYPE_PERFORMANCE_COUNTER_DESCRIPTION_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                             <name>pNext</name></member> <!-- Pointer to next structure -->
+            <member optional="true">const <type>void</type>*                             <name>pNext</name></member> <!-- Pointer to next structure -->
             <member optional="true"><type>VkPerformanceCounterDescriptionFlagsKHR</type> <name>flags</name></member>
             <member><type>char</type>                                    <name>name</name>[<enum>VK_MAX_DESCRIPTION_SIZE</enum>]</member>
             <member><type>char</type>                                    <name>category</name>[<enum>VK_MAX_DESCRIPTION_SIZE</enum>]</member>
@@ -4170,7 +4270,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkQueryPoolPerformanceCreateInfoKHR" structextends="VkQueryPoolCreateInfo">
             <member values="VK_STRUCTURE_TYPE_QUERY_POOL_PERFORMANCE_CREATE_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                             <name>pNext</name></member> <!-- Pointer to next structure -->
+            <member optional="true">const <type>void</type>*                             <name>pNext</name></member> <!-- Pointer to next structure -->
             <member><type>uint32_t</type>                                <name>queueFamilyIndex</name></member>
             <member><type>uint32_t</type>                                <name>counterIndexCount</name></member>
             <member len="counterIndexCount">const <type>uint32_t</type>* <name>pCounterIndices</name></member>
@@ -4185,34 +4285,34 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkAcquireProfilingLockInfoKHR">
             <member values="VK_STRUCTURE_TYPE_ACQUIRE_PROFILING_LOCK_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member optional="true"><type>VkAcquireProfilingLockFlagsKHR</type> <name>flags</name><comment>Acquire profiling lock flags</comment></member>
             <member><type>uint64_t</type> <name>timeout</name></member>
         </type>
         <type category="struct" name="VkPerformanceQuerySubmitInfoKHR" structextends="VkSubmitInfo">
             <member values="VK_STRUCTURE_TYPE_PERFORMANCE_QUERY_SUBMIT_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*         <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*         <name>pNext</name></member>
             <member><type>uint32_t</type>            <name>counterPassIndex</name><comment>Index for which counter pass to submit</comment></member>
         </type>
         <type category="struct" name="VkHeadlessSurfaceCreateInfoEXT">
             <member values="VK_STRUCTURE_TYPE_HEADLESS_SURFACE_CREATE_INFO_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*            <name>pNext</name></member>
             <member optional="true"><type>VkHeadlessSurfaceCreateFlagsEXT</type>   <name>flags</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceCoverageReductionModeFeaturesNV" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_COVERAGE_REDUCTION_MODE_FEATURES_NV"><type>VkStructureType</type><name>sType</name></member>
-            <member noautovalidity="true"><type>void</type>*    <name>pNext</name></member>
+            <member optional="true"><type>void</type>*    <name>pNext</name></member>
             <member><type>VkBool32</type>                       <name>coverageReductionMode</name></member>
         </type>
         <type category="struct" name="VkPipelineCoverageReductionStateCreateInfoNV" structextends="VkPipelineMultisampleStateCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PIPELINE_COVERAGE_REDUCTION_STATE_CREATE_INFO_NV"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                                                        <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                                                        <name>pNext</name></member>
             <member optional="true"><type>VkPipelineCoverageReductionStateCreateFlagsNV</type>      <name>flags</name></member>
             <member><type>VkCoverageReductionModeNV</type>                                          <name>coverageReductionMode</name></member>
         </type>
         <type category="struct" name="VkFramebufferMixedSamplesCombinationNV" returnedonly="true">
             <member values="VK_STRUCTURE_TYPE_FRAMEBUFFER_MIXED_SAMPLES_COMBINATION_NV"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                      <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                      <name>pNext</name></member>
             <member><type>VkCoverageReductionModeNV</type>  <name>coverageReductionMode</name></member>
             <member><type>VkSampleCountFlagBits</type>      <name>rasterizationSamples</name></member>
             <member><type>VkSampleCountFlags</type>         <name>depthStencilSamples</name></member>
@@ -4220,7 +4320,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkPhysicalDeviceShaderIntegerFunctions2FeaturesINTEL" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SHADER_INTEGER_FUNCTIONS_2_FEATURES_INTEL"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                            <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                            <name>pNext</name></member>
             <member><type>VkBool32</type>                         <name>shaderIntegerFunctions2</name></member>
         </type>
         <type category="union" name="VkPerformanceValueDataINTEL">
@@ -4236,98 +4336,98 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkInitializePerformanceApiInfoINTEL" >
             <member values="VK_STRUCTURE_TYPE_INITIALIZE_PERFORMANCE_API_INFO_INTEL"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                         <name>pNext</name></member>
-            <member optional="false"><type>void</type>*             <name>pUserData</name></member>
+            <member optional="true">const <type>void</type>*                         <name>pNext</name></member>
+            <member optional="true"><type>void</type>*               <name>pUserData</name></member>
         </type>
         <type category="struct" name="VkQueryPoolPerformanceQueryCreateInfoINTEL" structextends="VkQueryPoolCreateInfo">
             <member values="VK_STRUCTURE_TYPE_QUERY_POOL_PERFORMANCE_QUERY_CREATE_INFO_INTEL"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                         <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                         <name>pNext</name></member>
             <member><type>VkQueryPoolSamplingModeINTEL</type>        <name>performanceCountersSampling</name></member>
         </type>
         <type category="struct" name="VkQueryPoolCreateInfoINTEL"                              alias="VkQueryPoolPerformanceQueryCreateInfoINTEL"/>
         <type category="struct" name="VkPerformanceMarkerInfoINTEL">
             <member values="VK_STRUCTURE_TYPE_PERFORMANCE_MARKER_INFO_INTEL"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                         <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                         <name>pNext</name></member>
             <member><type>uint64_t</type>                            <name>marker</name></member>
         </type>
         <type category="struct" name="VkPerformanceStreamMarkerInfoINTEL">
             <member values="VK_STRUCTURE_TYPE_PERFORMANCE_STREAM_MARKER_INFO_INTEL"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                         <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                         <name>pNext</name></member>
             <member><type>uint32_t</type>                            <name>marker</name></member>
         </type>
         <type category="struct" name="VkPerformanceOverrideInfoINTEL">
             <member values="VK_STRUCTURE_TYPE_PERFORMANCE_OVERRIDE_INFO_INTEL"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                         <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                         <name>pNext</name></member>
             <member><type>VkPerformanceOverrideTypeINTEL</type>      <name>type</name></member>
             <member><type>VkBool32</type>                            <name>enable</name></member>
             <member><type>uint64_t</type>                            <name>parameter</name></member>
         </type>
         <type category="struct" name="VkPerformanceConfigurationAcquireInfoINTEL">
             <member values="VK_STRUCTURE_TYPE_PERFORMANCE_CONFIGURATION_ACQUIRE_INFO_INTEL"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                         <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                         <name>pNext</name></member>
             <member><type>VkPerformanceConfigurationTypeINTEL</type> <name>type</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceShaderClockFeaturesKHR" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SHADER_CLOCK_FEATURES_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                               <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                               <name>pNext</name></member>
             <member><type>VkBool32</type>                            <name>shaderSubgroupClock</name></member>
             <member><type>VkBool32</type>                            <name>shaderDeviceClock</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceIndexTypeUint8FeaturesEXT" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_INDEX_TYPE_UINT8_FEATURES_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member noautovalidity="true"><type>void</type>*        <name>pNext</name></member>
+            <member optional="true"><type>void</type>*        <name>pNext</name></member>
             <member><type>VkBool32</type>                           <name>indexTypeUint8</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceShaderSMBuiltinsPropertiesNV" returnedonly="true" structextends="VkPhysicalDeviceProperties2">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SHADER_SM_BUILTINS_PROPERTIES_NV"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                          <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                          <name>pNext</name></member>
             <member><type>uint32_t</type>                       <name>shaderSMCount</name></member>
             <member><type>uint32_t</type>                       <name>shaderWarpsPerSM</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceShaderSMBuiltinsFeaturesNV" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SHADER_SM_BUILTINS_FEATURES_NV"><type>VkStructureType</type><name>sType</name></member>
-            <member noautovalidity="true"><type>void</type>*    <name>pNext</name></member>
+            <member optional="true"><type>void</type>*    <name>pNext</name></member>
             <member><type>VkBool32</type>                       <name>shaderSMBuiltins</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceFragmentShaderInterlockFeaturesEXT" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FRAGMENT_SHADER_INTERLOCK_FEATURES_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                  <name>pNext</name><comment>Pointer to next structure</comment></member>
+            <member optional="true"><type>void</type>*                  <name>pNext</name><comment>Pointer to next structure</comment></member>
             <member><type>VkBool32</type>               <name>fragmentShaderSampleInterlock</name></member>
             <member><type>VkBool32</type>               <name>fragmentShaderPixelInterlock</name></member>
             <member><type>VkBool32</type>               <name>fragmentShaderShadingRateInterlock</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceSeparateDepthStencilLayoutsFeatures" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SEPARATE_DEPTH_STENCIL_LAYOUTS_FEATURES"><type>VkStructureType</type><name>sType</name></member>
-            <member noautovalidity="true"><type>void</type>*    <name>pNext</name></member>
+            <member optional="true"><type>void</type>*    <name>pNext</name></member>
             <member><type>VkBool32</type>                       <name>separateDepthStencilLayouts</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceSeparateDepthStencilLayoutsFeaturesKHR"  alias="VkPhysicalDeviceSeparateDepthStencilLayoutsFeatures"/>
         <type category="struct" name="VkAttachmentReferenceStencilLayout" structextends="VkAttachmentReference2">
             <member values="VK_STRUCTURE_TYPE_ATTACHMENT_REFERENCE_STENCIL_LAYOUT"><type>VkStructureType</type><name>sType</name></member>
-            <member noautovalidity="true"><type>void</type>*    <name>pNext</name></member>
+            <member optional="true"><type>void</type>*    <name>pNext</name></member>
             <member><type>VkImageLayout</type>                  <name>stencilLayout</name></member>
         </type>
         <type category="struct" name="VkAttachmentReferenceStencilLayoutKHR"                   alias="VkAttachmentReferenceStencilLayout"/>
         <type category="struct" name="VkAttachmentDescriptionStencilLayout" structextends="VkAttachmentDescription2">
             <member values="VK_STRUCTURE_TYPE_ATTACHMENT_DESCRIPTION_STENCIL_LAYOUT"><type>VkStructureType</type><name>sType</name></member>
-            <member noautovalidity="true"><type>void</type>*    <name>pNext</name></member>
+            <member optional="true"><type>void</type>*    <name>pNext</name></member>
             <member><type>VkImageLayout</type>                  <name>stencilInitialLayout</name></member>
             <member><type>VkImageLayout</type>                  <name>stencilFinalLayout</name></member>
         </type>
         <type category="struct" name="VkAttachmentDescriptionStencilLayoutKHR"                 alias="VkAttachmentDescriptionStencilLayout"/>
         <type category="struct" name="VkPhysicalDevicePipelineExecutablePropertiesFeaturesKHR" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_PIPELINE_EXECUTABLE_PROPERTIES_FEATURES_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*              <name>pNext</name></member>
+            <member optional="true"><type>void</type>*              <name>pNext</name></member>
             <member><type>VkBool32</type>           <name>pipelineExecutableInfo</name></member>
         </type>
         <type category="struct" name="VkPipelineInfoKHR">
             <member values="VK_STRUCTURE_TYPE_PIPELINE_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*        <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*        <name>pNext</name></member>
             <member><type>VkPipeline</type>         <name>pipeline</name></member>
         </type>
         <type category="struct" name="VkPipelineExecutablePropertiesKHR" returnedonly="true">
             <member values="VK_STRUCTURE_TYPE_PIPELINE_EXECUTABLE_PROPERTIES_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*              <name>pNext</name></member>
+            <member optional="true"><type>void</type>*              <name>pNext</name></member>
             <member><type>VkShaderStageFlags</type> <name>stages</name></member>
             <member><type>char</type>               <name>name</name>[<enum>VK_MAX_DESCRIPTION_SIZE</enum>]</member>
             <member><type>char</type>               <name>description</name>[<enum>VK_MAX_DESCRIPTION_SIZE</enum>]</member>
@@ -4335,7 +4435,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkPipelineExecutableInfoKHR">
             <member values="VK_STRUCTURE_TYPE_PIPELINE_EXECUTABLE_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*        <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*        <name>pNext</name></member>
             <member><type>VkPipeline</type>         <name>pipeline</name></member>
             <member><type>uint32_t</type>           <name>executableIndex</name></member>
         </type>
@@ -4347,7 +4447,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkPipelineExecutableStatisticKHR" returnedonly="true">
             <member values="VK_STRUCTURE_TYPE_PIPELINE_EXECUTABLE_STATISTIC_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*              <name>pNext</name></member>
+            <member optional="true"><type>void</type>*              <name>pNext</name></member>
             <member><type>char</type>               <name>name</name>[<enum>VK_MAX_DESCRIPTION_SIZE</enum>]</member>
             <member><type>char</type>               <name>description</name>[<enum>VK_MAX_DESCRIPTION_SIZE</enum>]</member>
             <member><type>VkPipelineExecutableStatisticFormatKHR</type> <name>format</name></member>
@@ -4355,7 +4455,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkPipelineExecutableInternalRepresentationKHR" returnedonly="true">
             <member values="VK_STRUCTURE_TYPE_PIPELINE_EXECUTABLE_INTERNAL_REPRESENTATION_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*              <name>pNext</name></member>
+            <member optional="true"><type>void</type>*              <name>pNext</name></member>
             <member><type>char</type>               <name>name</name>[<enum>VK_MAX_DESCRIPTION_SIZE</enum>]</member>
             <member><type>char</type>               <name>description</name>[<enum>VK_MAX_DESCRIPTION_SIZE</enum>]</member>
             <member><type>VkBool32</type>           <name>isText</name></member>
@@ -4364,56 +4464,56 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkPhysicalDeviceShaderDemoteToHelperInvocationFeaturesEXT" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SHADER_DEMOTE_TO_HELPER_INVOCATION_FEATURES_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member noautovalidity="true"><type>void</type>*        <name>pNext</name></member>
+            <member optional="true"><type>void</type>*        <name>pNext</name></member>
             <member><type>VkBool32</type>                           <name>shaderDemoteToHelperInvocation</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceTexelBufferAlignmentFeaturesEXT" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_TEXEL_BUFFER_ALIGNMENT_FEATURES_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member noautovalidity="true"><type>void</type>*        <name>pNext</name></member>
+            <member optional="true"><type>void</type>*        <name>pNext</name></member>
             <member><type>VkBool32</type>                           <name>texelBufferAlignment</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceTexelBufferAlignmentPropertiesEXT" structextends="VkPhysicalDeviceProperties2" returnedonly="true">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_TEXEL_BUFFER_ALIGNMENT_PROPERTIES_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member noautovalidity="true"><type>void</type>*        <name>pNext</name></member>
+            <member optional="true"><type>void</type>*              <name>pNext</name></member>
             <member><type>VkDeviceSize</type>                       <name>storageTexelBufferOffsetAlignmentBytes</name></member>
             <member><type>VkBool32</type>                           <name>storageTexelBufferOffsetSingleTexelAlignment</name></member>
             <member><type>VkDeviceSize</type>                       <name>uniformTexelBufferOffsetAlignmentBytes</name></member>
             <member><type>VkBool32</type>                           <name>uniformTexelBufferOffsetSingleTexelAlignment</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceSubgroupSizeControlFeaturesEXT" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
-             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SUBGROUP_SIZE_CONTROL_FEATURES_EXT"><type>VkStructureType</type> <name>sType</name></member>
-             <member><type>void</type>*                          <name>pNext</name></member>
-             <member><type>VkBool32</type> <name>subgroupSizeControl</name></member>
-             <member><type>VkBool32</type> <name>computeFullSubgroups</name></member>
+            <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SUBGROUP_SIZE_CONTROL_FEATURES_EXT"><type>VkStructureType</type> <name>sType</name></member>
+            <member optional="true"><type>void</type>*                          <name>pNext</name></member>
+            <member><type>VkBool32</type> <name>subgroupSizeControl</name></member>
+            <member><type>VkBool32</type> <name>computeFullSubgroups</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceSubgroupSizeControlPropertiesEXT" returnedonly="true" structextends="VkPhysicalDeviceProperties2">
-             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SUBGROUP_SIZE_CONTROL_PROPERTIES_EXT"><type>VkStructureType</type> <name>sType</name></member>
-             <member><type>void</type>*                          <name>pNext</name></member>
-             <member noautovalidity="true"><type>uint32_t</type> <name>minSubgroupSize</name><comment>The minimum subgroup size supported by this device</comment></member>
-             <member noautovalidity="true"><type>uint32_t</type> <name>maxSubgroupSize</name><comment>The maximum subgroup size supported by this device</comment></member>
-             <member noautovalidity="true"><type>uint32_t</type> <name>maxComputeWorkgroupSubgroups</name><comment>The maximum number of subgroups supported in a workgroup</comment></member>
-             <member><type>VkShaderStageFlags</type>             <name>requiredSubgroupSizeStages</name><comment>The shader stages that support specifying a subgroup size</comment></member>
+            <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SUBGROUP_SIZE_CONTROL_PROPERTIES_EXT"><type>VkStructureType</type> <name>sType</name></member>
+            <member optional="true"><type>void</type>*                          <name>pNext</name></member>
+            <member noautovalidity="true"><type>uint32_t</type> <name>minSubgroupSize</name><comment>The minimum subgroup size supported by this device</comment></member>
+            <member noautovalidity="true"><type>uint32_t</type> <name>maxSubgroupSize</name><comment>The maximum subgroup size supported by this device</comment></member>
+            <member noautovalidity="true"><type>uint32_t</type> <name>maxComputeWorkgroupSubgroups</name><comment>The maximum number of subgroups supported in a workgroup</comment></member>
+            <member><type>VkShaderStageFlags</type>             <name>requiredSubgroupSizeStages</name><comment>The shader stages that support specifying a subgroup size</comment></member>
         </type>
         <type category="struct" name="VkPipelineShaderStageRequiredSubgroupSizeCreateInfoEXT" returnedonly="true" structextends="VkPipelineShaderStageCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PIPELINE_SHADER_STAGE_REQUIRED_SUBGROUP_SIZE_CREATE_INFO_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                  <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                  <name>pNext</name></member>
             <member><type>uint32_t</type>               <name>requiredSubgroupSize</name></member>
         </type>
         <type category="struct" name="VkMemoryOpaqueCaptureAddressAllocateInfo" structextends="VkMemoryAllocateInfo">
             <member values="VK_STRUCTURE_TYPE_MEMORY_OPAQUE_CAPTURE_ADDRESS_ALLOCATE_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                   <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                   <name>pNext</name></member>
             <member><type>uint64_t</type>                      <name>opaqueCaptureAddress</name></member>
         </type>
         <type category="struct" name="VkMemoryOpaqueCaptureAddressAllocateInfoKHR"             alias="VkMemoryOpaqueCaptureAddressAllocateInfo"/>
         <type category="struct" name="VkDeviceMemoryOpaqueCaptureAddressInfo">
             <member values="VK_STRUCTURE_TYPE_DEVICE_MEMORY_OPAQUE_CAPTURE_ADDRESS_INFO"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                      <name>pNext</name></member>
             <member><type>VkDeviceMemory</type>                   <name>memory</name></member>
         </type>
         <type category="struct" name="VkDeviceMemoryOpaqueCaptureAddressInfoKHR"               alias="VkDeviceMemoryOpaqueCaptureAddressInfo"/>
         <type category="struct" name="VkPhysicalDeviceLineRasterizationFeaturesEXT" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_LINE_RASTERIZATION_FEATURES_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member noautovalidity="true"><type>void</type>*        <name>pNext</name></member>
+            <member optional="true"><type>void</type>*        <name>pNext</name></member>
             <member><type>VkBool32</type>                           <name>rectangularLines</name></member>
             <member><type>VkBool32</type>                           <name>bresenhamLines</name></member>
             <member><type>VkBool32</type>                           <name>smoothLines</name></member>
@@ -4423,12 +4523,12 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkPhysicalDeviceLineRasterizationPropertiesEXT" returnedonly="true" structextends="VkPhysicalDeviceProperties2">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_LINE_RASTERIZATION_PROPERTIES_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                               <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                               <name>pNext</name></member>
             <member><type>uint32_t</type>                            <name>lineSubPixelPrecisionBits</name></member>
         </type>
         <type category="struct" name="VkPipelineRasterizationLineStateCreateInfoEXT" structextends="VkPipelineRasterizationStateCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PIPELINE_RASTERIZATION_LINE_STATE_CREATE_INFO_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                                                      <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                                                      <name>pNext</name></member>
             <member><type>VkLineRasterizationModeEXT</type>                                       <name>lineRasterizationMode</name></member>
             <member><type>VkBool32</type>                                                         <name>stippledLineEnable</name></member>
             <member optional="true"><type>uint32_t</type>                                         <name>lineStippleFactor</name></member>
@@ -4436,12 +4536,12 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkPhysicalDevicePipelineCreationCacheControlFeaturesEXT" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_PIPELINE_CREATION_CACHE_CONTROL_FEATURES_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member noautovalidity="true"><type>void</type>* <name>pNext</name></member>
+            <member optional="true"><type>void</type>* <name>pNext</name></member>
             <member><type>VkBool32</type>                                                         <name>pipelineCreationCacheControl</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceVulkan11Features" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_VULKAN_1_1_FEATURES"><type>VkStructureType</type><name>sType</name></member>
-            <member noautovalidity="true"><type>void</type>*    <name>pNext</name></member>
+            <member optional="true"><type>void</type>*    <name>pNext</name></member>
             <member><type>VkBool32</type>                         <name>storageBuffer16BitAccess</name><comment>16-bit integer/floating-point variables supported in BufferBlock</comment></member>
             <member><type>VkBool32</type>                         <name>uniformAndStorageBuffer16BitAccess</name><comment>16-bit integer/floating-point variables supported in BufferBlock and Block</comment></member>
             <member><type>VkBool32</type>                         <name>storagePushConstant16</name><comment>16-bit integer/floating-point variables supported in PushConstant</comment></member>
@@ -4457,7 +4557,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkPhysicalDeviceVulkan11Properties" returnedonly="true" structextends="VkPhysicalDeviceProperties2">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_VULKAN_1_1_PROPERTIES"><type>VkStructureType</type><name>sType</name></member>
-            <member noautovalidity="true"><type>void</type>*      <name>pNext</name></member>
+            <member optional="true"><type>void</type>*      <name>pNext</name></member>
             <member><type>uint8_t</type>                          <name>deviceUUID</name>[<enum>VK_UUID_SIZE</enum>]</member>
             <member><type>uint8_t</type>                          <name>driverUUID</name>[<enum>VK_UUID_SIZE</enum>]</member>
             <member><type>uint8_t</type>                          <name>deviceLUID</name>[<enum>VK_LUID_SIZE</enum>]</member>
@@ -4476,7 +4576,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkPhysicalDeviceVulkan12Features" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_VULKAN_1_2_FEATURES"><type>VkStructureType</type><name>sType</name></member>
-            <member noautovalidity="true"><type>void</type>*    <name>pNext</name></member>
+            <member optional="true"><type>void</type>*    <name>pNext</name></member>
             <member><type>VkBool32</type>                         <name>samplerMirrorClampToEdge</name></member>
             <member><type>VkBool32</type>                         <name>drawIndirectCount</name></member>
             <member><type>VkBool32</type>                         <name>storageBuffer8BitAccess</name><comment>8-bit integer variables supported in StorageBuffer</comment></member>
@@ -4527,7 +4627,7 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkPhysicalDeviceVulkan12Properties" returnedonly="true" structextends="VkPhysicalDeviceProperties2">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_VULKAN_1_2_PROPERTIES"><type>VkStructureType</type><name>sType</name></member>
-            <member noautovalidity="true"><type>void</type>*    <name>pNext</name></member>
+            <member optional="true"><type>void</type>*    <name>pNext</name></member>
             <member><type>VkDriverId</type>                       <name>driverID</name></member>
             <member><type>char</type>                             <name>driverName</name>[<enum>VK_MAX_DRIVER_NAME_SIZE</enum>]</member>
             <member><type>char</type>                             <name>driverInfo</name>[<enum>VK_MAX_DRIVER_INFO_SIZE</enum>]</member>
@@ -4583,17 +4683,17 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkPipelineCompilerControlCreateInfoAMD" structextends="VkGraphicsPipelineCreateInfo,VkComputePipelineCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PIPELINE_COMPILER_CONTROL_CREATE_INFO_AMD"><type>VkStructureType</type>   <name>sType</name></member>
-            <member>const <type>void</type>*                                                                            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                                                                            <name>pNext</name></member>
             <member optional="true"><type>VkPipelineCompilerControlFlagsAMD</type>                                      <name>compilerControlFlags</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceCoherentMemoryFeaturesAMD" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_COHERENT_MEMORY_FEATURES_AMD"><type>VkStructureType</type> <name>sType</name></member>
-            <member noautovalidity="true"><type>void</type>*        <name>pNext</name></member>
+            <member optional="true"><type>void</type>*        <name>pNext</name></member>
             <member><type>VkBool32</type>                           <name>deviceCoherentMemory</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceToolPropertiesEXT" returnedonly="true">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_TOOL_PROPERTIES_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>* <name>pNext</name></member>
+            <member optional="true"><type>void</type>* <name>pNext</name></member>
             <member><type>char</type>            <name>name</name>[<enum>VK_MAX_EXTENSION_NAME_SIZE</enum>]</member>
             <member><type>char</type>            <name>version</name>[<enum>VK_MAX_EXTENSION_NAME_SIZE</enum>]</member>
             <member><type>VkToolPurposeFlagsEXT</type> <name>purposes</name></member>
@@ -4602,18 +4702,18 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkSamplerCustomBorderColorCreateInfoEXT" structextends="VkSamplerCreateInfo">
             <member values="VK_STRUCTURE_TYPE_SAMPLER_CUSTOM_BORDER_COLOR_CREATE_INFO_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                                                                            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                                                                            <name>pNext</name></member>
             <member><type>VkClearColorValue</type>                                                                      <name>customBorderColor</name></member>
             <member><type>VkFormat</type>                                                                               <name>format</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceCustomBorderColorPropertiesEXT" structextends="VkPhysicalDeviceProperties2" returnedonly="true">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_CUSTOM_BORDER_COLOR_PROPERTIES_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member noautovalidity="true"><type>void</type>*                                                                   <name>pNext</name></member>
+            <member optional="true"><type>void</type>*                                                                   <name>pNext</name></member>
             <member><type>uint32_t</type>                                                                                      <name>maxCustomBorderColorSamplers</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceCustomBorderColorFeaturesEXT" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_CUSTOM_BORDER_COLOR_FEATURES_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member noautovalidity="true"><type>void</type>*        <name>pNext</name></member>
+            <member optional="true"><type>void</type>*        <name>pNext</name></member>
             <member><type>VkBool32</type>                           <name>customBorderColors</name></member>
             <member><type>VkBool32</type>                           <name>customBorderColorWithoutFormat</name></member>
         </type>
@@ -4627,23 +4727,24 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkAccelerationStructureGeometryTrianglesDataKHR">
             <member values="VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_GEOMETRY_TRIANGLES_DATA_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                                   <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                                   <name>pNext</name></member>
             <member><type>VkFormat</type>                                      <name>vertexFormat</name></member>
             <member><type>VkDeviceOrHostAddressConstKHR</type>                 <name>vertexData</name></member>
             <member><type>VkDeviceSize</type>                                  <name>vertexStride</name></member>
+            <member><type>uint32_t</type>                                      <name>maxVertex</name></member>
             <member><type>VkIndexType</type>                                   <name>indexType</name></member>
             <member optional="true"><type>VkDeviceOrHostAddressConstKHR</type> <name>indexData</name></member>
             <member optional="true"><type>VkDeviceOrHostAddressConstKHR</type> <name>transformData</name></member>
         </type>
         <type category="struct" name="VkAccelerationStructureGeometryAabbsDataKHR">
             <member values="VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_GEOMETRY_AABBS_DATA_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                           <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                           <name>pNext</name></member>
             <member><type>VkDeviceOrHostAddressConstKHR</type>         <name>data</name></member>
             <member><type>VkDeviceSize</type>                          <name>stride</name></member>
         </type>
         <type category="struct" name="VkAccelerationStructureGeometryInstancesDataKHR">
             <member values="VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_GEOMETRY_INSTANCES_DATA_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                           <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                           <name>pNext</name></member>
             <member><type>VkBool32</type>                              <name>arrayOfPointers</name></member>
             <member><type>VkDeviceOrHostAddressConstKHR</type>         <name>data</name></member>
         </type>
@@ -4654,48 +4755,38 @@ typedef void <name>CAMetalLayer</name>;
         </type>
         <type category="struct" name="VkAccelerationStructureGeometryKHR">
             <member values="VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_GEOMETRY_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                            <name>pNext</name></member>
             <member><type>VkGeometryTypeKHR</type>                      <name>geometryType</name></member>
             <member selector="geometryType"><type>VkAccelerationStructureGeometryDataKHR</type> <name>geometry</name></member>
             <member optional="true"><type>VkGeometryFlagsKHR</type>     <name>flags</name></member>
         </type>
         <type category="struct" name="VkAccelerationStructureBuildGeometryInfoKHR">
             <member values="VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_BUILD_GEOMETRY_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                                                        <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                                                        <name>pNext</name></member>
             <member><type>VkAccelerationStructureTypeKHR</type>                                     <name>type</name></member>
             <member optional="true"><type>VkBuildAccelerationStructureFlagsKHR</type>               <name>flags</name></member>
-            <member><type>VkBool32</type>                                                           <name>update</name></member>
+            <member><type>VkBuildAccelerationStructureModeKHR</type>                                <name>mode</name></member>
             <member optional="true"><type>VkAccelerationStructureKHR</type>                         <name>srcAccelerationStructure</name></member>
-            <member><type>VkAccelerationStructureKHR</type>                                         <name>dstAccelerationStructure</name></member>
-            <member><type>VkBool32</type>                                                           <name>geometryArrayOfPointers</name></member>
+            <member optional="true"><type>VkAccelerationStructureKHR</type>                         <name>dstAccelerationStructure</name></member>
             <member optional="true"><type>uint32_t</type>                                           <name>geometryCount</name></member>
-            <member noautovalidity="true">const <type>VkAccelerationStructureGeometryKHR</type>* const*   <name>ppGeometries</name></member>
+            <member len="geometryCount" optional="true,false">const <type>VkAccelerationStructureGeometryKHR</type>*    <name>pGeometries</name></member>
+            <member len="geometryCount,1" optional="true,false,false">const <type>VkAccelerationStructureGeometryKHR</type>* const*   <name>ppGeometries</name></member>
             <member><type>VkDeviceOrHostAddressKHR</type>                                           <name>scratchData</name></member>
         </type>
-        <type category="struct" name="VkAccelerationStructureBuildOffsetInfoKHR">
+        <type category="struct" name="VkAccelerationStructureBuildRangeInfoKHR">
             <member><type>uint32_t</type>                                                <name>primitiveCount</name></member>
             <member><type>uint32_t</type>                                                <name>primitiveOffset</name></member>
             <member optional="true"><type>uint32_t</type>                                <name>firstVertex</name></member>
             <member optional="true"><type>uint32_t</type>                                <name>transformOffset</name></member>
         </type>
-        <type category="struct" name="VkAccelerationStructureCreateGeometryTypeInfoKHR">
-            <member values="VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_CREATE_GEOMETRY_TYPE_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                                             <name>pNext</name></member>
-            <member><type>VkGeometryTypeKHR</type>                                       <name>geometryType</name></member>
-            <member><type>uint32_t</type>                                                <name>maxPrimitiveCount</name></member>
-            <member><type>VkIndexType</type>                                              <name>indexType</name></member>
-            <member optional="true"><type>uint32_t</type>                                <name>maxVertexCount</name></member>
-            <member optional="true"><type>VkFormat</type>                                <name>vertexFormat</name></member>
-            <member optional="true"><type>VkBool32</type>                                <name>allowsTransforms</name></member>
-        </type>
         <type category="struct" name="VkAccelerationStructureCreateInfoKHR">
             <member values="VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_CREATE_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                                             <name>pNext</name></member>
-            <member><type>VkDeviceSize</type>                                            <name>compactedSize</name></member>
+            <member optional="true">const <type>void</type>*                             <name>pNext</name></member>
+            <member optional="true"><type>VkAccelerationStructureCreateFlagsKHR</type>   <name>createFlags</name></member>
+            <member><type>VkBuffer</type>                                                <name>buffer</name></member>
+            <member><type>VkDeviceSize</type>                                            <name>offset</name><comment>Specified in bytes</comment></member>
+            <member><type>VkDeviceSize</type>                                            <name>size</name></member>
             <member><type>VkAccelerationStructureTypeKHR</type>                          <name>type</name></member>
-            <member optional="true"><type>VkBuildAccelerationStructureFlagsKHR</type>    <name>flags</name></member>
-            <member optional="true"><type>uint32_t</type>                                <name>maxGeometryCount</name></member>
-            <member len="maxGeometryCount">const <type>VkAccelerationStructureCreateGeometryTypeInfoKHR</type>* <name>pGeometryInfos</name></member>
             <member optional="true"><type>VkDeviceAddress</type>                         <name>deviceAddress</name></member>
         </type>
         <type category="struct" name="VkAabbPositionsKHR">
@@ -4723,87 +4814,309 @@ typedef void <name>CAMetalLayer</name>;
         <type category="struct" name="VkAccelerationStructureInstanceNV"                       alias="VkAccelerationStructureInstanceKHR"/>
         <type category="struct" name="VkAccelerationStructureDeviceAddressInfoKHR">
             <member values="VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_DEVICE_ADDRESS_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                                            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                                            <name>pNext</name></member>
             <member><type>VkAccelerationStructureKHR</type>                             <name>accelerationStructure</name></member>
         </type>
-        <type category="struct" name="VkAccelerationStructureVersionKHR">
-            <member values="VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_VERSION_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                                            <name>pNext</name></member>
-            <member len="2*VK_UUID_SIZE">const <type>uint8_t</type>*                    <name>versionData</name></member>
+        <type category="struct" name="VkAccelerationStructureVersionInfoKHR">
+            <member values="VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_VERSION_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
+            <member optional="true">const <type>void</type>*                                            <name>pNext</name></member>
+            <member len="2*ename:VK_UUID_SIZE" altlen="2*VK_UUID_SIZE">const <type>uint8_t</type>*                    <name>pVersionData</name></member>
         </type>
         <type category="struct" name="VkCopyAccelerationStructureInfoKHR">
             <member values="VK_STRUCTURE_TYPE_COPY_ACCELERATION_STRUCTURE_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                                            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                                            <name>pNext</name></member>
             <member><type>VkAccelerationStructureKHR</type>                             <name>src</name></member>
             <member><type>VkAccelerationStructureKHR</type>                             <name>dst</name></member>
             <member><type>VkCopyAccelerationStructureModeKHR</type>                     <name>mode</name></member>
         </type>
         <type category="struct" name="VkCopyAccelerationStructureToMemoryInfoKHR">
             <member values="VK_STRUCTURE_TYPE_COPY_ACCELERATION_STRUCTURE_TO_MEMORY_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                                            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                                            <name>pNext</name></member>
             <member><type>VkAccelerationStructureKHR</type>                             <name>src</name></member>
             <member><type>VkDeviceOrHostAddressKHR</type>                               <name>dst</name></member>
             <member><type>VkCopyAccelerationStructureModeKHR</type>                     <name>mode</name></member>
         </type>
         <type category="struct" name="VkCopyMemoryToAccelerationStructureInfoKHR">
             <member values="VK_STRUCTURE_TYPE_COPY_MEMORY_TO_ACCELERATION_STRUCTURE_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                                            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                                            <name>pNext</name></member>
             <member><type>VkDeviceOrHostAddressConstKHR</type>                          <name>src</name></member>
             <member><type>VkAccelerationStructureKHR</type>                             <name>dst</name></member>
             <member><type>VkCopyAccelerationStructureModeKHR</type>                     <name>mode</name></member>
         </type>
         <type category="struct" name="VkRayTracingPipelineInterfaceCreateInfoKHR">
             <member values="VK_STRUCTURE_TYPE_RAY_TRACING_PIPELINE_INTERFACE_CREATE_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                                            <name>pNext</name></member>
-            <member><type>uint32_t</type>                                               <name>maxPayloadSize</name></member>
-            <member><type>uint32_t</type>                                               <name>maxAttributeSize</name></member>
-            <member><type>uint32_t</type>                                               <name>maxCallableSize</name></member>
-        </type>
-        <type category="struct" name="VkDeferredOperationInfoKHR" structextends="VkRayTracingPipelineCreateInfoKHR,VkAccelerationStructureBuildGeometryInfoKHR,VkCopyAccelerationStructureInfoKHR,VkCopyMemoryToAccelerationStructureInfoKHR,VkCopyAccelerationStructureToMemoryInfoKHR">
-            <member values="VK_STRUCTURE_TYPE_DEFERRED_OPERATION_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                   <name>pNext</name></member>
-            <member noautovalidity="true"><type>VkDeferredOperationKHR</type>        <name>operationHandle</name></member>
+            <member optional="true">const <type>void</type>*                            <name>pNext</name></member>
+            <member><type>uint32_t</type>                                               <name>maxPipelineRayPayloadSize</name></member>
+            <member><type>uint32_t</type>                                               <name>maxPipelineRayHitAttributeSize</name></member>
         </type>
         <type category="struct" name="VkPipelineLibraryCreateInfoKHR">
             <member values="VK_STRUCTURE_TYPE_PIPELINE_LIBRARY_CREATE_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                                            <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                                            <name>pNext</name></member>
             <member optional="true"><type>uint32_t</type>                               <name>libraryCount</name></member>
             <member len="libraryCount">const <type>VkPipeline</type>*                   <name>pLibraries</name></member>
         </type>
+        <type category="struct" name="VkPhysicalDeviceExtendedDynamicStateFeaturesEXT" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
+            <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_EXTENDED_DYNAMIC_STATE_FEATURES_EXT"><type>VkStructureType</type> <name>sType</name></member>
+            <member optional="true"><type>void</type>*        <name>pNext</name></member>
+            <member><type>VkBool32</type>                           <name>extendedDynamicState</name></member>
+        </type>
         <type category="struct" name="VkRenderPassTransformBeginInfoQCOM" structextends="VkRenderPassBeginInfo">
             <member values="VK_STRUCTURE_TYPE_RENDER_PASS_TRANSFORM_BEGIN_INFO_QCOM"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                           <name>pNext</name><comment>Pointer to next structure</comment></member>
+            <member optional="true"><type>void</type>*                           <name>pNext</name><comment>Pointer to next structure</comment></member>
+            <member noautovalidity="true"><type>VkSurfaceTransformFlagBitsKHR</type>   <name>transform</name></member>
+        </type>
+        <type category="struct" name="VkCopyCommandTransformInfoQCOM" structextends="VkBufferImageCopy2KHR,VkImageBlit2KHR">
+            <member values="VK_STRUCTURE_TYPE_COPY_COMMAND_TRANSFORM_INFO_QCOM"><type>VkStructureType</type> <name>sType</name></member>
+            <member optional="true" noautovalidity="true">const <type>void</type>*     <name>pNext</name></member>
             <member noautovalidity="true"><type>VkSurfaceTransformFlagBitsKHR</type>   <name>transform</name></member>
         </type>
         <type category="struct" name="VkCommandBufferInheritanceRenderPassTransformInfoQCOM" structextends="VkCommandBufferInheritanceInfo">
             <member values="VK_STRUCTURE_TYPE_COMMAND_BUFFER_INHERITANCE_RENDER_PASS_TRANSFORM_INFO_QCOM"><type>VkStructureType</type> <name>sType</name></member>
-            <member><type>void</type>*                           <name>pNext</name><comment>Pointer to next structure</comment></member>
+            <member optional="true"><type>void</type>*                           <name>pNext</name><comment>Pointer to next structure</comment></member>
             <member noautovalidity="true"><type>VkSurfaceTransformFlagBitsKHR</type>   <name>transform</name></member>
             <member><type>VkRect2D</type>                        <name>renderArea</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceDiagnosticsConfigFeaturesNV" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_DIAGNOSTICS_CONFIG_FEATURES_NV"><type>VkStructureType</type><name>sType</name></member>
-            <member noautovalidity="true"><type>void</type>*    <name>pNext</name></member>
+            <member optional="true"><type>void</type>*    <name>pNext</name></member>
             <member><type>VkBool32</type>                       <name>diagnosticsConfig</name></member>
         </type>
         <type category="struct" name="VkDeviceDiagnosticsConfigCreateInfoNV" structextends="VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_DEVICE_DIAGNOSTICS_CONFIG_CREATE_INFO_NV"><type>VkStructureType</type> <name>sType</name></member>
-            <member>const <type>void</type>*                                         <name>pNext</name></member>
+            <member optional="true">const <type>void</type>*                                         <name>pNext</name></member>
             <member optional="true"><type>VkDeviceDiagnosticsConfigFlagsNV</type>    <name>flags</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceRobustness2FeaturesEXT" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_ROBUSTNESS_2_FEATURES_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member noautovalidity="true"><type>void</type>*        <name>pNext</name></member>
+            <member optional="true"><type>void</type>*        <name>pNext</name></member>
             <member><type>VkBool32</type>                           <name>robustBufferAccess2</name></member>
             <member><type>VkBool32</type>                           <name>robustImageAccess2</name></member>
             <member><type>VkBool32</type>                           <name>nullDescriptor</name></member>
         </type>
         <type category="struct" name="VkPhysicalDeviceRobustness2PropertiesEXT" returnedonly="true" structextends="VkPhysicalDeviceProperties2">
             <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_ROBUSTNESS_2_PROPERTIES_EXT"><type>VkStructureType</type> <name>sType</name></member>
-            <member noautovalidity="true"><type>void</type>*        <name>pNext</name></member>
+            <member optional="true"><type>void</type>*        <name>pNext</name></member>
             <member><type>VkDeviceSize</type>                       <name>robustStorageBufferAccessSizeAlignment</name></member>
             <member><type>VkDeviceSize</type>                       <name>robustUniformBufferAccessSizeAlignment</name></member>
         </type>
+        <type category="struct" name="VkPhysicalDeviceImageRobustnessFeaturesEXT" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
+            <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_IMAGE_ROBUSTNESS_FEATURES_EXT"><type>VkStructureType</type> <name>sType</name></member>
+            <member optional="true"><type>void</type>*        <name>pNext</name></member>
+            <member><type>VkBool32</type>                           <name>robustImageAccess</name></member>
+        </type>
+        <type category="struct" name="VkPhysicalDevicePortabilitySubsetFeaturesKHR" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
+            <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_PORTABILITY_SUBSET_FEATURES_KHR"><type>VkStructureType</type> <name>sType</name></member>
+            <member optional="true"><type>void</type>*        <name>pNext</name></member>
+            <member><type>VkBool32</type>                           <name>constantAlphaColorBlendFactors</name></member>
+            <member><type>VkBool32</type>                           <name>events</name></member>
+            <member><type>VkBool32</type>                           <name>imageViewFormatReinterpretation</name></member>
+            <member><type>VkBool32</type>                           <name>imageViewFormatSwizzle</name></member>
+            <member><type>VkBool32</type>                           <name>imageView2DOn3DImage</name></member>
+            <member><type>VkBool32</type>                           <name>multisampleArrayImage</name></member>
+            <member><type>VkBool32</type>                           <name>mutableComparisonSamplers</name></member>
+            <member><type>VkBool32</type>                           <name>pointPolygons</name></member>
+            <member><type>VkBool32</type>                           <name>samplerMipLodBias</name></member>
+            <member><type>VkBool32</type>                           <name>separateStencilMaskRef</name></member>
+            <member><type>VkBool32</type>                           <name>shaderSampleRateInterpolationFunctions</name></member>
+            <member><type>VkBool32</type>                           <name>tessellationIsolines</name></member>
+            <member><type>VkBool32</type>                           <name>tessellationPointMode</name></member>
+            <member><type>VkBool32</type>                           <name>triangleFans</name></member>
+            <member><type>VkBool32</type>                           <name>vertexAttributeAccessBeyondStride</name></member>
+        </type>
+        <type category="struct" name="VkPhysicalDevicePortabilitySubsetPropertiesKHR" structextends="VkPhysicalDeviceProperties2">
+            <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_PORTABILITY_SUBSET_PROPERTIES_KHR"><type>VkStructureType</type> <name>sType</name></member>
+            <member optional="true"><type>void</type>*        <name>pNext</name></member>
+            <member><type>uint32_t</type>                           <name>minVertexInputBindingStrideAlignment</name></member>
+        </type>
+        <type category="struct" name="VkPhysicalDevice4444FormatsFeaturesEXT" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
+            <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_4444_FORMATS_FEATURES_EXT"><type>VkStructureType</type> <name>sType</name></member>
+            <member optional="true"><type>void</type>*        <name>pNext</name></member>
+            <member><type>VkBool32</type>                           <name>formatA4R4G4B4</name></member>
+            <member><type>VkBool32</type>                           <name>formatA4B4G4R4</name></member>
+        </type>
+        <type category="struct" name="VkBufferCopy2KHR">
+            <member values="VK_STRUCTURE_TYPE_BUFFER_COPY_2_KHR"><type>VkStructureType</type> <name>sType</name></member>
+            <member optional="true">const <type>void</type>*  <name>pNext</name></member>
+            <member><type>VkDeviceSize</type> <name>srcOffset</name><comment>Specified in bytes</comment></member>
+            <member><type>VkDeviceSize</type> <name>dstOffset</name><comment>Specified in bytes</comment></member>
+            <member noautovalidity="true"><type>VkDeviceSize</type> <name>size</name><comment>Specified in bytes</comment></member>
+        </type>
+        <type category="struct" name="VkImageCopy2KHR">
+            <member values="VK_STRUCTURE_TYPE_IMAGE_COPY_2_KHR"><type>VkStructureType</type> <name>sType</name></member>
+            <member optional="true">const <type>void</type>* <name>pNext</name></member>
+            <member><type>VkImageSubresourceLayers</type> <name>srcSubresource</name></member>
+            <member><type>VkOffset3D</type> <name>srcOffset</name><comment>Specified in pixels for both compressed and uncompressed images</comment></member>
+            <member><type>VkImageSubresourceLayers</type> <name>dstSubresource</name></member>
+            <member><type>VkOffset3D</type> <name>dstOffset</name><comment>Specified in pixels for both compressed and uncompressed images</comment></member>
+            <member><type>VkExtent3D</type> <name>extent</name><comment>Specified in pixels for both compressed and uncompressed images</comment></member>
+        </type>
+        <type category="struct" name="VkImageBlit2KHR">
+            <member values="VK_STRUCTURE_TYPE_IMAGE_BLIT_2_KHR"><type>VkStructureType</type> <name>sType</name></member>
+            <member optional="true">const <type>void</type>*  <name>pNext</name></member>
+            <member><type>VkImageSubresourceLayers</type> <name>srcSubresource</name></member>
+            <member><type>VkOffset3D</type> <name>srcOffsets</name>[2]<comment>Specified in pixels for both compressed and uncompressed images</comment></member>
+            <member><type>VkImageSubresourceLayers</type> <name>dstSubresource</name></member>
+            <member><type>VkOffset3D</type> <name>dstOffsets</name>[2]<comment>Specified in pixels for both compressed and uncompressed images</comment></member>
+        </type>
+        <type category="struct" name="VkBufferImageCopy2KHR">
+            <member values="VK_STRUCTURE_TYPE_BUFFER_IMAGE_COPY_2_KHR"><type>VkStructureType</type> <name>sType</name></member>
+            <member optional="true">const <type>void</type>*  <name>pNext</name></member>
+            <member><type>VkDeviceSize</type> <name>bufferOffset</name><comment>Specified in bytes</comment></member>
+            <member><type>uint32_t</type> <name>bufferRowLength</name><comment>Specified in texels</comment></member>
+            <member><type>uint32_t</type> <name>bufferImageHeight</name></member>
+            <member><type>VkImageSubresourceLayers</type> <name>imageSubresource</name></member>
+            <member><type>VkOffset3D</type> <name>imageOffset</name><comment>Specified in pixels for both compressed and uncompressed images</comment></member>
+            <member><type>VkExtent3D</type> <name>imageExtent</name><comment>Specified in pixels for both compressed and uncompressed images</comment></member>
+        </type>
+        <type category="struct" name="VkImageResolve2KHR">
+            <member values="VK_STRUCTURE_TYPE_IMAGE_RESOLVE_2_KHR"><type>VkStructureType</type> <name>sType</name></member>
+            <member optional="true">const <type>void</type>*  <name>pNext</name></member>
+            <member><type>VkImageSubresourceLayers</type> <name>srcSubresource</name></member>
+            <member><type>VkOffset3D</type> <name>srcOffset</name></member>
+            <member><type>VkImageSubresourceLayers</type> <name>dstSubresource</name></member>
+            <member><type>VkOffset3D</type> <name>dstOffset</name></member>
+            <member><type>VkExtent3D</type> <name>extent</name></member>
+        </type>
+        <type category="struct" name="VkCopyBufferInfo2KHR">
+            <member values="VK_STRUCTURE_TYPE_COPY_BUFFER_INFO_2_KHR"><type>VkStructureType</type> <name>sType</name></member>
+            <member optional="true">const <type>void</type>* <name>pNext</name></member>
+            <member><type>VkBuffer</type> <name>srcBuffer</name></member>
+            <member><type>VkBuffer</type> <name>dstBuffer</name></member>
+            <member><type>uint32_t</type> <name>regionCount</name></member>
+            <member len="regionCount">const <type>VkBufferCopy2KHR</type>* <name>pRegions</name></member>
+        </type>
+        <type category="struct" name="VkCopyImageInfo2KHR">
+            <member values="VK_STRUCTURE_TYPE_COPY_IMAGE_INFO_2_KHR"><type>VkStructureType</type> <name>sType</name></member>
+            <member optional="true">const <type>void</type>* <name>pNext</name></member>
+            <member><type>VkImage</type> <name>srcImage</name></member>
+            <member><type>VkImageLayout</type> <name>srcImageLayout</name></member>
+            <member><type>VkImage</type> <name>dstImage</name></member>
+            <member><type>VkImageLayout</type> <name>dstImageLayout</name></member>
+            <member><type>uint32_t</type> <name>regionCount</name></member>
+            <member len="regionCount">const <type>VkImageCopy2KHR</type>* <name>pRegions</name></member>
+        </type>
+        <type category="struct" name="VkBlitImageInfo2KHR">
+            <member values="VK_STRUCTURE_TYPE_BLIT_IMAGE_INFO_2_KHR"><type>VkStructureType</type> <name>sType</name></member>
+            <member optional="true">const <type>void</type>* <name>pNext</name></member>
+            <member><type>VkImage</type> <name>srcImage</name></member>
+            <member><type>VkImageLayout</type> <name>srcImageLayout</name></member>
+            <member><type>VkImage</type> <name>dstImage</name></member>
+            <member><type>VkImageLayout</type> <name>dstImageLayout</name></member>
+            <member><type>uint32_t</type> <name>regionCount</name></member>
+            <member len="regionCount">const <type>VkImageBlit2KHR</type>* <name>pRegions</name></member>
+            <member><type>VkFilter</type> <name>filter</name></member>
+        </type>
+        <type category="struct" name="VkCopyBufferToImageInfo2KHR">
+            <member values="VK_STRUCTURE_TYPE_COPY_BUFFER_TO_IMAGE_INFO_2_KHR"><type>VkStructureType</type> <name>sType</name></member>
+            <member optional="true">const <type>void</type>* <name>pNext</name></member>
+            <member><type>VkBuffer</type> <name>srcBuffer</name></member>
+            <member><type>VkImage</type> <name>dstImage</name></member>
+            <member><type>VkImageLayout</type> <name>dstImageLayout</name></member>
+            <member><type>uint32_t</type> <name>regionCount</name></member>
+            <member len="regionCount">const <type>VkBufferImageCopy2KHR</type>* <name>pRegions</name></member>
+        </type>
+        <type category="struct" name="VkCopyImageToBufferInfo2KHR">
+            <member values="VK_STRUCTURE_TYPE_COPY_IMAGE_TO_BUFFER_INFO_2_KHR"><type>VkStructureType</type> <name>sType</name></member>
+            <member optional="true">const <type>void</type>* <name>pNext</name></member>
+            <member><type>VkImage</type> <name>srcImage</name></member>
+            <member><type>VkImageLayout</type> <name>srcImageLayout</name></member>
+            <member><type>VkBuffer</type> <name>dstBuffer</name></member>
+            <member><type>uint32_t</type> <name>regionCount</name></member>
+            <member len="regionCount">const <type>VkBufferImageCopy2KHR</type>* <name>pRegions</name></member>
+        </type>
+        <type category="struct" name="VkResolveImageInfo2KHR">
+            <member values="VK_STRUCTURE_TYPE_RESOLVE_IMAGE_INFO_2_KHR"><type>VkStructureType</type> <name>sType</name></member>
+            <member optional="true">const <type>void</type>* <name>pNext</name></member>
+            <member><type>VkImage</type> <name>srcImage</name></member>
+            <member><type>VkImageLayout</type> <name>srcImageLayout</name></member>
+            <member><type>VkImage</type> <name>dstImage</name></member>
+            <member><type>VkImageLayout</type> <name>dstImageLayout</name></member>
+            <member><type>uint32_t</type> <name>regionCount</name></member>
+            <member len="regionCount">const <type>VkImageResolve2KHR</type>* <name>pRegions</name></member>
+        </type>
+        <type category="struct" name="VkPhysicalDeviceShaderImageAtomicInt64FeaturesEXT" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
+            <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SHADER_IMAGE_ATOMIC_INT64_FEATURES_EXT"><type>VkStructureType</type> <name>sType</name></member>
+            <member optional="true"><type>void</type>*                               <name>pNext</name></member>
+            <member><type>VkBool32</type>                            <name>shaderImageInt64Atomics</name></member>
+            <member><type>VkBool32</type>                            <name>sparseImageInt64Atomics</name></member>
+        </type>
+        <type category="struct" name="VkFragmentShadingRateAttachmentInfoKHR" structextends="VkSubpassDescription2">
+            <member values="VK_STRUCTURE_TYPE_FRAGMENT_SHADING_RATE_ATTACHMENT_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
+            <member optional="true">const <type>void</type>*                <name>pNext</name></member>
+            <member>const <type>VkAttachmentReference2</type>* <name>pFragmentShadingRateAttachment</name></member>
+            <member><type>VkExtent2D</type>                 <name>shadingRateAttachmentTexelSize</name></member>
+        </type>
+        <type category="struct" name="VkPipelineFragmentShadingRateStateCreateInfoKHR" structextends="VkGraphicsPipelineCreateInfo">
+            <member values="VK_STRUCTURE_TYPE_PIPELINE_FRAGMENT_SHADING_RATE_STATE_CREATE_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
+            <member optional="true">const <type>void</type>*                                <name>pNext</name></member>
+            <member><type>VkExtent2D</type>                                 <name>fragmentSize</name></member>
+            <member><type>VkFragmentShadingRateCombinerOpKHR</type>         <name>combinerOps</name>[2]</member>
+        </type>
+        <type category="struct" name="VkPhysicalDeviceFragmentShadingRateFeaturesKHR" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
+            <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FRAGMENT_SHADING_RATE_FEATURES_KHR"><type>VkStructureType</type> <name>sType</name></member>
+            <member optional="true"><type>void</type>*              <name>pNext</name></member>
+            <member><type>VkBool32</type>           <name>pipelineFragmentShadingRate</name></member>
+            <member><type>VkBool32</type>           <name>primitiveFragmentShadingRate</name></member>
+            <member><type>VkBool32</type>           <name>attachmentFragmentShadingRate</name></member>
+        </type>
+        <type category="struct" name="VkPhysicalDeviceFragmentShadingRatePropertiesKHR" structextends="VkPhysicalDeviceProperties2" returnedonly="true">
+            <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FRAGMENT_SHADING_RATE_PROPERTIES_KHR"><type>VkStructureType</type> <name>sType</name></member>
+            <member optional="true"><type>void</type>*                  <name>pNext</name></member>
+            <member><type>VkExtent2D</type>             <name>minFragmentShadingRateAttachmentTexelSize</name></member>
+            <member><type>VkExtent2D</type>             <name>maxFragmentShadingRateAttachmentTexelSize</name></member>
+            <member><type>uint32_t</type>               <name>maxFragmentShadingRateAttachmentTexelSizeAspectRatio</name></member>
+            <member><type>VkBool32</type>               <name>primitiveFragmentShadingRateWithMultipleViewports</name></member>
+            <member><type>VkBool32</type>               <name>layeredShadingRateAttachments</name></member>
+            <member><type>VkBool32</type>               <name>fragmentShadingRateNonTrivialCombinerOps</name></member>
+            <member><type>VkExtent2D</type>             <name>maxFragmentSize</name></member>
+            <member><type>uint32_t</type>               <name>maxFragmentSizeAspectRatio</name></member>
+            <member><type>uint32_t</type>               <name>maxFragmentShadingRateCoverageSamples</name></member>
+            <member><type>VkSampleCountFlagBits</type>  <name>maxFragmentShadingRateRasterizationSamples</name></member>
+            <member><type>VkBool32</type>               <name>fragmentShadingRateWithShaderDepthStencilWrites</name></member>
+            <member><type>VkBool32</type>               <name>fragmentShadingRateWithSampleMask</name></member>
+            <member><type>VkBool32</type>               <name>fragmentShadingRateWithShaderSampleMask</name></member>
+            <member><type>VkBool32</type>               <name>fragmentShadingRateWithConservativeRasterization</name></member>
+            <member><type>VkBool32</type>               <name>fragmentShadingRateWithFragmentShaderInterlock</name></member>
+            <member><type>VkBool32</type>               <name>fragmentShadingRateWithCustomSampleLocations</name></member>
+            <member><type>VkBool32</type>               <name>fragmentShadingRateStrictMultiplyCombiner</name></member>
+        </type>
+        <type category="struct" name="VkPhysicalDeviceFragmentShadingRateKHR" returnedonly="true">
+            <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FRAGMENT_SHADING_RATE_KHR"><type>VkStructureType</type> <name>sType</name></member>
+            <member optional="true"><type>void</type>*              <name>pNext</name></member>
+            <member><type>VkSampleCountFlags</type> <name>sampleCounts</name></member>
+            <member><type>VkExtent2D</type>         <name>fragmentSize</name></member>
+        </type>
+        <type category="struct" name="VkPhysicalDeviceShaderTerminateInvocationFeaturesKHR" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
+            <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SHADER_TERMINATE_INVOCATION_FEATURES_KHR"><type>VkStructureType</type><name>sType</name></member>
+            <member optional="true" noautovalidity="true"><type>void</type>*    <name>pNext</name></member>
+            <member><type>VkBool32</type>                       <name>shaderTerminateInvocation</name></member>
+        </type>
+        <type category="struct" name="VkPhysicalDeviceFragmentShadingRateEnumsFeaturesNV" structextends="VkPhysicalDeviceFeatures2,VkDeviceCreateInfo">
+            <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FRAGMENT_SHADING_RATE_ENUMS_FEATURES_NV"><type>VkStructureType</type> <name>sType</name></member>
+            <member optional="true"><type>void</type>*                              <name>pNext</name></member>
+            <member><type>VkBool32</type>                           <name>fragmentShadingRateEnums</name></member>
+            <member><type>VkBool32</type>                           <name>supersampleFragmentShadingRates</name></member>
+            <member><type>VkBool32</type>                           <name>noInvocationFragmentShadingRates</name></member>
+        </type>
+        <type category="struct" name="VkPhysicalDeviceFragmentShadingRateEnumsPropertiesNV" structextends="VkPhysicalDeviceProperties2">
+            <member values="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FRAGMENT_SHADING_RATE_ENUMS_PROPERTIES_NV"><type>VkStructureType</type> <name>sType</name></member>
+            <member optional="true"><type>void</type>*                              <name>pNext</name></member>
+            <member><type>VkSampleCountFlagBits</type>              <name>maxFragmentShadingRateInvocationCount</name></member>
+        </type>
+        <type category="struct" name="VkPipelineFragmentShadingRateEnumStateCreateInfoNV" structextends="VkGraphicsPipelineCreateInfo">
+            <member values="VK_STRUCTURE_TYPE_PIPELINE_FRAGMENT_SHADING_RATE_ENUM_STATE_CREATE_INFO_NV"><type>VkStructureType</type> <name>sType</name></member>
+            <member optional="true">const <type>void</type>*                        <name>pNext</name></member>
+            <member><type>VkFragmentShadingRateTypeNV</type>        <name>shadingRateType</name></member>
+            <member><type>VkFragmentShadingRateNV</type>            <name>shadingRate</name></member>
+            <member><type>VkFragmentShadingRateCombinerOpKHR</type> <name>combinerOps</name>[2]</member>
+        </type>
+        <type category="struct" name="VkAccelerationStructureBuildSizesInfoKHR">
+            <member values="VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_BUILD_SIZES_INFO_KHR"><type>VkStructureType</type> <name>sType</name></member>
+            <member optional="true">const <type>void</type>*        <name>pNext</name></member>
+            <member><type>VkDeviceSize</type>                       <name>accelerationStructureSize</name></member>
+            <member><type>VkDeviceSize</type>                       <name>updateScratchSize</name></member>
+            <member><type>VkDeviceSize</type>                       <name>buildScratchSize</name></member>
+        </type>
     </types>
 
     <comment>Vulkan enumerant (token) definitions</comment>
@@ -4988,12 +5301,6 @@ typedef void <name>CAMetalLayer</name>;
         <enum value="1"     name="VK_POLYGON_MODE_LINE"/>
         <enum value="2"     name="VK_POLYGON_MODE_POINT"/>
     </enums>
-    <enums name="VkCullModeFlagBits" type="bitmask">
-        <enum value="0"     name="VK_CULL_MODE_NONE"/>
-        <enum bitpos="0"    name="VK_CULL_MODE_FRONT_BIT"/>
-        <enum bitpos="1"    name="VK_CULL_MODE_BACK_BIT"/>
-        <enum value="0x00000003" name="VK_CULL_MODE_FRONT_AND_BACK"/>
-    </enums>
     <enums name="VkFrontFace" type="enum">
         <enum value="0"     name="VK_FRONT_FACE_COUNTER_CLOCKWISE"/>
         <enum value="1"     name="VK_FRONT_FACE_CLOCKWISE"/>
@@ -5355,7 +5662,7 @@ typedef void <name>CAMetalLayer</name>;
     <enums name="VkDescriptorUpdateTemplateType" type="enum">
         <enum value="0"     name="VK_DESCRIPTOR_UPDATE_TEMPLATE_TYPE_DESCRIPTOR_SET"   comment="Create descriptor update template for descriptor set updates"/>
     </enums>
-    <enums name="VkObjectType" type="enum" comment="Enums to track objects of various types">
+    <enums name="VkObjectType" type="enum" comment="Enums to track objects of various types - also see objtypeenum attributes on type tags">
         <enum value="0"     name="VK_OBJECT_TYPE_UNKNOWN"/>
         <enum value="1"     name="VK_OBJECT_TYPE_INSTANCE"                           comment="VkInstance"/>
         <enum value="2"     name="VK_OBJECT_TYPE_PHYSICAL_DEVICE"                    comment="VkPhysicalDevice"/>
@@ -5391,6 +5698,12 @@ typedef void <name>CAMetalLayer</name>;
         <enum bitpos="2"    name="VK_QUEUE_TRANSFER_BIT"                             comment="Queue supports transfer operations"/>
         <enum bitpos="3"    name="VK_QUEUE_SPARSE_BINDING_BIT"                       comment="Queue supports sparse resource memory management operations"/>
     </enums>
+    <enums name="VkCullModeFlagBits" type="bitmask">
+        <enum value="0"     name="VK_CULL_MODE_NONE"/>
+        <enum bitpos="0"    name="VK_CULL_MODE_FRONT_BIT"/>
+        <enum bitpos="1"    name="VK_CULL_MODE_BACK_BIT"/>
+        <enum value="0x00000003" name="VK_CULL_MODE_FRONT_AND_BACK"/>
+    </enums>
     <enums name="VkRenderPassCreateFlagBits" type="bitmask"></enums>
     <enums name="VkDeviceQueueCreateFlagBits" type="bitmask"></enums>
     <enums name="VkMemoryPropertyFlagBits" type="bitmask">
@@ -5485,8 +5798,7 @@ typedef void <name>CAMetalLayer</name>;
     <enums name="VkFenceCreateFlagBits" type="bitmask">
         <enum bitpos="0"    name="VK_FENCE_CREATE_SIGNALED_BIT"/>
     </enums>
-    <enums name="VkSemaphoreCreateFlagBits" type="bitmask">
-    </enums>
+        <comment>When VkSemaphoreCreateFlagBits is first extended, need to add a bitmask enums tag for it here</comment>
     <enums name="VkFormatFeatureFlagBits" type="bitmask">
         <enum bitpos="0"    name="VK_FORMAT_FEATURE_SAMPLED_IMAGE_BIT"               comment="Format can be used for sampled images (SAMPLED_IMAGE and COMBINED_IMAGE_SAMPLER descriptor types)"/>
         <enum bitpos="1"    name="VK_FORMAT_FEATURE_STORAGE_IMAGE_BIT"               comment="Format can be used for storage images (STORAGE_IMAGE descriptor type)"/>
@@ -5692,6 +6004,13 @@ typedef void <name>CAMetalLayer</name>;
         <enum value="33"    name="VK_DEBUG_REPORT_OBJECT_TYPE_VALIDATION_CACHE_EXT_EXT"/>
         <enum               name="VK_DEBUG_REPORT_OBJECT_TYPE_VALIDATION_CACHE_EXT" alias="VK_DEBUG_REPORT_OBJECT_TYPE_VALIDATION_CACHE_EXT_EXT" comment="Backwards-compatible alias containing a typo"/>
     </enums>
+    <enums name="VkDeviceMemoryReportEventTypeEXT" type="enum">
+        <enum value="0"     name="VK_DEVICE_MEMORY_REPORT_EVENT_TYPE_ALLOCATE_EXT"/>
+        <enum value="1"     name="VK_DEVICE_MEMORY_REPORT_EVENT_TYPE_FREE_EXT"/>
+        <enum value="2"     name="VK_DEVICE_MEMORY_REPORT_EVENT_TYPE_IMPORT_EXT"/>
+        <enum value="3"     name="VK_DEVICE_MEMORY_REPORT_EVENT_TYPE_UNIMPORT_EXT"/>
+        <enum value="4"     name="VK_DEVICE_MEMORY_REPORT_EVENT_TYPE_ALLOCATION_FAILED_EXT"/>
+    </enums>
     <enums name="VkRasterizationOrderAMD" type="enum">
         <enum value="0"     name="VK_RASTERIZATION_ORDER_STRICT_AMD"/>
         <enum value="1"     name="VK_RASTERIZATION_ORDER_RELAXED_AMD"/>
@@ -5716,6 +6035,7 @@ typedef void <name>CAMetalLayer</name>;
         <enum value="1"     name="VK_VALIDATION_FEATURE_ENABLE_GPU_ASSISTED_RESERVE_BINDING_SLOT_EXT"/>
         <enum value="2"     name="VK_VALIDATION_FEATURE_ENABLE_BEST_PRACTICES_EXT"/>
         <enum value="3"     name="VK_VALIDATION_FEATURE_ENABLE_DEBUG_PRINTF_EXT"/>
+        <enum value="4"     name="VK_VALIDATION_FEATURE_ENABLE_SYNCHRONIZATION_VALIDATION_EXT"/>
     </enums>
     <enums name="VkValidationFeatureDisableEXT" type="enum">
         <enum value="0"     name="VK_VALIDATION_FEATURE_DISABLE_ALL_EXT"/>
@@ -5777,6 +6097,7 @@ typedef void <name>CAMetalLayer</name>;
         <enum bitpos="1"    name="VK_EXTERNAL_SEMAPHORE_HANDLE_TYPE_OPAQUE_WIN32_BIT"/>
         <enum bitpos="2"    name="VK_EXTERNAL_SEMAPHORE_HANDLE_TYPE_OPAQUE_WIN32_KMT_BIT"/>
         <enum bitpos="3"    name="VK_EXTERNAL_SEMAPHORE_HANDLE_TYPE_D3D12_FENCE_BIT"/>
+        <enum               name="VK_EXTERNAL_SEMAPHORE_HANDLE_TYPE_D3D11_FENCE_BIT" alias="VK_EXTERNAL_SEMAPHORE_HANDLE_TYPE_D3D12_FENCE_BIT"/>
         <enum bitpos="4"    name="VK_EXTERNAL_SEMAPHORE_HANDLE_TYPE_SYNC_FD_BIT"/>
     </enums>
     <enums name="VkExternalSemaphoreFeatureFlagBits" type="bitmask">
@@ -5800,7 +6121,8 @@ typedef void <name>CAMetalLayer</name>;
         <enum bitpos="0"    name="VK_FENCE_IMPORT_TEMPORARY_BIT"/>
     </enums>
     <enums name="VkSurfaceCounterFlagBitsEXT" type="bitmask">
-        <enum bitpos="0"    name="VK_SURFACE_COUNTER_VBLANK_EXT"/>
+        <enum bitpos="0"    name="VK_SURFACE_COUNTER_VBLANK_BIT_EXT"/>
+        <enum               name="VK_SURFACE_COUNTER_VBLANK_EXT" alias="VK_SURFACE_COUNTER_VBLANK_BIT_EXT" comment="Backwards-compatible alias containing a typo"/>
     </enums>
     <enums name="VkDisplayPowerStateEXT" type="enum">
         <enum value="0"     name="VK_DISPLAY_POWER_STATE_OFF_EXT"/>
@@ -5934,7 +6256,8 @@ typedef void <name>CAMetalLayer</name>;
         <enum value="0x10003" name="VK_VENDOR_ID_KAZAN" comment="Kazan Software Renderer"/>
         <enum value="0x10004" name="VK_VENDOR_ID_CODEPLAY" comment="Codeplay Software Ltd. vendor ID"/>
         <enum value="0x10005" name="VK_VENDOR_ID_MESA"  comment="Mesa vendor ID"/>
-            <unused start="0x10006" comment="This is the next unused available Khronos vendor ID"/>
+        <enum value="0x10006" name="VK_VENDOR_ID_POCL"  comment="PoCL vendor ID"/>
+            <unused start="0x10007" comment="This is the next unused available Khronos vendor ID"/>
     </enums>
     <enums name="VkDriverId" type="enum">
         <comment>Driver IDs are now represented as enums instead of the old
@@ -5953,6 +6276,7 @@ typedef void <name>CAMetalLayer</name>;
         <enum value="11"      name="VK_DRIVER_ID_GGP_PROPRIETARY"               comment="Google LLC"/>
         <enum value="12"      name="VK_DRIVER_ID_BROADCOM_PROPRIETARY"          comment="Broadcom Inc."/>
         <enum value="13"      name="VK_DRIVER_ID_MESA_LLVMPIPE"                 comment="Mesa"/>
+        <enum value="14"      name="VK_DRIVER_ID_MOLTENVK"                      comment="MoltenVK"/>
     </enums>
     <enums name="VkConditionalRenderingFlagBitsEXT" type="bitmask">
         <enum bitpos="0"    name="VK_CONDITIONAL_RENDERING_INVERTED_BIT_EXT"/>
@@ -6001,24 +6325,33 @@ typedef void <name>CAMetalLayer</name>;
         <enum bitpos="3" name="VK_BUILD_ACCELERATION_STRUCTURE_PREFER_FAST_BUILD_BIT_KHR"/>
         <enum bitpos="4" name="VK_BUILD_ACCELERATION_STRUCTURE_LOW_MEMORY_BIT_KHR"/>
     </enums>
+    <enums name="VkAccelerationStructureCreateFlagBitsKHR" type="bitmask">
+        <enum bitpos="0" name="VK_ACCELERATION_STRUCTURE_CREATE_DEVICE_ADDRESS_CAPTURE_REPLAY_BIT_KHR"/>
+    </enums>
     <enums name="VkCopyAccelerationStructureModeKHR" type="enum">
         <enum value="0" name="VK_COPY_ACCELERATION_STRUCTURE_MODE_CLONE_KHR"/>
         <enum value="1" name="VK_COPY_ACCELERATION_STRUCTURE_MODE_COMPACT_KHR"/>
         <enum value="2" name="VK_COPY_ACCELERATION_STRUCTURE_MODE_SERIALIZE_KHR"/>
         <enum value="3" name="VK_COPY_ACCELERATION_STRUCTURE_MODE_DESERIALIZE_KHR"/>
     </enums>
+    <enums name="VkBuildAccelerationStructureModeKHR" type="enum">
+        <enum value="0" name="VK_BUILD_ACCELERATION_STRUCTURE_MODE_BUILD_KHR"/>
+        <enum value="1" name="VK_BUILD_ACCELERATION_STRUCTURE_MODE_UPDATE_KHR"/>
+    </enums>
     <enums name="VkAccelerationStructureTypeKHR" type="enum">
         <enum value="0" name="VK_ACCELERATION_STRUCTURE_TYPE_TOP_LEVEL_KHR"/>
         <enum value="1" name="VK_ACCELERATION_STRUCTURE_TYPE_BOTTOM_LEVEL_KHR"/>
+        <enum value="2" name="VK_ACCELERATION_STRUCTURE_TYPE_GENERIC_KHR"/>
     </enums>
     <enums name="VkGeometryTypeKHR" type="enum">
         <enum value="0" name="VK_GEOMETRY_TYPE_TRIANGLES_KHR"/>
         <enum value="1" name="VK_GEOMETRY_TYPE_AABBS_KHR"/>
+        <enum value="2" name="VK_GEOMETRY_TYPE_INSTANCES_KHR"/>
     </enums>
-    <enums name="VkAccelerationStructureMemoryRequirementsTypeKHR" type="enum">
-        <enum value="0" name="VK_ACCELERATION_STRUCTURE_MEMORY_REQUIREMENTS_TYPE_OBJECT_KHR"/>
-        <enum value="1" name="VK_ACCELERATION_STRUCTURE_MEMORY_REQUIREMENTS_TYPE_BUILD_SCRATCH_KHR"/>
-        <enum value="2" name="VK_ACCELERATION_STRUCTURE_MEMORY_REQUIREMENTS_TYPE_UPDATE_SCRATCH_KHR"/>
+    <enums name="VkAccelerationStructureMemoryRequirementsTypeNV" type="enum">
+        <enum value="0" name="VK_ACCELERATION_STRUCTURE_MEMORY_REQUIREMENTS_TYPE_OBJECT_NV"/>
+        <enum value="1" name="VK_ACCELERATION_STRUCTURE_MEMORY_REQUIREMENTS_TYPE_BUILD_SCRATCH_NV"/>
+        <enum value="2" name="VK_ACCELERATION_STRUCTURE_MEMORY_REQUIREMENTS_TYPE_UPDATE_SCRATCH_NV"/>
     </enums>
     <enums name="VkAccelerationStructureBuildTypeKHR" type="enum">
         <enum value="0" name="VK_ACCELERATION_STRUCTURE_BUILD_TYPE_HOST_KHR"/>
@@ -6030,6 +6363,16 @@ typedef void <name>CAMetalLayer</name>;
         <enum value="1" name="VK_RAY_TRACING_SHADER_GROUP_TYPE_TRIANGLES_HIT_GROUP_KHR"/>
         <enum value="2" name="VK_RAY_TRACING_SHADER_GROUP_TYPE_PROCEDURAL_HIT_GROUP_KHR"/>
     </enums>
+    <enums name="VkAccelerationStructureCompatibilityKHR" type="enum">
+        <enum value="0" name="VK_ACCELERATION_STRUCTURE_COMPATIBILITY_COMPATIBLE_KHR"/>
+        <enum value="1" name="VK_ACCELERATION_STRUCTURE_COMPATIBILITY_INCOMPATIBLE_KHR"/>
+    </enums>
+    <enums name="VkShaderGroupShaderKHR" type="enum">
+        <enum value="0" name="VK_SHADER_GROUP_SHADER_GENERAL_KHR"/>
+        <enum value="1" name="VK_SHADER_GROUP_SHADER_CLOSEST_HIT_KHR"/>
+        <enum value="2" name="VK_SHADER_GROUP_SHADER_ANY_HIT_KHR"/>
+        <enum value="3" name="VK_SHADER_GROUP_SHADER_INTERSECTION_KHR"/>
+    </enums>
     <enums name="VkMemoryOverallocationBehaviorAMD" type="enum">
         <enum value="0"     name="VK_MEMORY_OVERALLOCATION_BEHAVIOR_DEFAULT_AMD"/>
         <enum value="1"     name="VK_MEMORY_OVERALLOCATION_BEHAVIOR_ALLOWED_AMD"/>
@@ -6102,8 +6445,10 @@ typedef void <name>CAMetalLayer</name>;
         <enum value="5"     name="VK_PERFORMANCE_COUNTER_STORAGE_FLOAT64_KHR"/>
     </enums>
     <enums name="VkPerformanceCounterDescriptionFlagBitsKHR" type="bitmask">
-        <enum bitpos="0"     name="VK_PERFORMANCE_COUNTER_DESCRIPTION_PERFORMANCE_IMPACTING_KHR"/>
-        <enum bitpos="1"     name="VK_PERFORMANCE_COUNTER_DESCRIPTION_CONCURRENTLY_IMPACTED_KHR"/>
+        <enum bitpos="0"    name="VK_PERFORMANCE_COUNTER_DESCRIPTION_PERFORMANCE_IMPACTING_BIT_KHR"/>
+        <enum               name="VK_PERFORMANCE_COUNTER_DESCRIPTION_PERFORMANCE_IMPACTING_KHR" alias="VK_PERFORMANCE_COUNTER_DESCRIPTION_PERFORMANCE_IMPACTING_BIT_KHR" comment="Backwards-compatible alias containing a typo"/>
+        <enum bitpos="1"    name="VK_PERFORMANCE_COUNTER_DESCRIPTION_CONCURRENTLY_IMPACTED_BIT_KHR"/>
+        <enum               name="VK_PERFORMANCE_COUNTER_DESCRIPTION_CONCURRENTLY_IMPACTED_KHR" alias="VK_PERFORMANCE_COUNTER_DESCRIPTION_CONCURRENTLY_IMPACTED_BIT_KHR" comment="Backwards-compatible alias containing a typo"/>
     </enums>
     <enums name="VkAcquireProfilingLockFlagBitsKHR" type="bitmask">
     </enums>
@@ -6158,6 +6503,31 @@ typedef void <name>CAMetalLayer</name>;
         <enum bitpos="3"     name="VK_TOOL_PURPOSE_ADDITIONAL_FEATURES_BIT_EXT"/>
         <enum bitpos="4"     name="VK_TOOL_PURPOSE_MODIFYING_FEATURES_BIT_EXT"/>
     </enums>
+    <enums name="VkFragmentShadingRateCombinerOpKHR" type="enum">
+        <enum value="0" name="VK_FRAGMENT_SHADING_RATE_COMBINER_OP_KEEP_KHR"/>
+        <enum value="1" name="VK_FRAGMENT_SHADING_RATE_COMBINER_OP_REPLACE_KHR"/>
+        <enum value="2" name="VK_FRAGMENT_SHADING_RATE_COMBINER_OP_MIN_KHR"/>
+        <enum value="3" name="VK_FRAGMENT_SHADING_RATE_COMBINER_OP_MAX_KHR"/>
+        <enum value="4" name="VK_FRAGMENT_SHADING_RATE_COMBINER_OP_MUL_KHR"/>
+    </enums>
+    <enums name="VkFragmentShadingRateNV" type="enum">
+        <enum value="0"  name="VK_FRAGMENT_SHADING_RATE_1_INVOCATION_PER_PIXEL_NV"/>
+        <enum value="1"  name="VK_FRAGMENT_SHADING_RATE_1_INVOCATION_PER_1X2_PIXELS_NV"/>
+        <enum value="4"  name="VK_FRAGMENT_SHADING_RATE_1_INVOCATION_PER_2X1_PIXELS_NV"/>
+        <enum value="5"  name="VK_FRAGMENT_SHADING_RATE_1_INVOCATION_PER_2X2_PIXELS_NV"/>
+        <enum value="6"  name="VK_FRAGMENT_SHADING_RATE_1_INVOCATION_PER_2X4_PIXELS_NV"/>
+        <enum value="9"  name="VK_FRAGMENT_SHADING_RATE_1_INVOCATION_PER_4X2_PIXELS_NV"/>
+        <enum value="10" name="VK_FRAGMENT_SHADING_RATE_1_INVOCATION_PER_4X4_PIXELS_NV"/>
+        <enum value="11" name="VK_FRAGMENT_SHADING_RATE_2_INVOCATIONS_PER_PIXEL_NV"/>
+        <enum value="12" name="VK_FRAGMENT_SHADING_RATE_4_INVOCATIONS_PER_PIXEL_NV"/>
+        <enum value="13" name="VK_FRAGMENT_SHADING_RATE_8_INVOCATIONS_PER_PIXEL_NV"/>
+        <enum value="14" name="VK_FRAGMENT_SHADING_RATE_16_INVOCATIONS_PER_PIXEL_NV"/>
+        <enum value="15" name="VK_FRAGMENT_SHADING_RATE_NO_INVOCATIONS_NV"/>
+    </enums>
+    <enums name="VkFragmentShadingRateTypeNV" type="enum">
+        <enum value="0"  name="VK_FRAGMENT_SHADING_RATE_TYPE_FRAGMENT_SIZE_NV"/>
+        <enum value="1"  name="VK_FRAGMENT_SHADING_RATE_TYPE_ENUMS_NV"/>
+    </enums>
 
     <commands comment="Vulkan command definitions">
         <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY,VK_ERROR_INITIALIZATION_FAILED,VK_ERROR_LAYER_NOT_PRESENT,VK_ERROR_EXTENSION_NOT_PRESENT,VK_ERROR_INCOMPATIBLE_DRIVER">
@@ -6295,7 +6665,7 @@ typedef void <name>CAMetalLayer</name>;
                 <param>all sname:VkQueue objects created from pname:device</param>
             </implicitexternsyncparams>
         </command>
-        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY,VK_ERROR_TOO_MANY_OBJECTS,VK_ERROR_INVALID_EXTERNAL_HANDLE,VK_ERROR_INVALID_OPAQUE_CAPTURE_ADDRESS_KHR">
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY,VK_ERROR_INVALID_EXTERNAL_HANDLE,VK_ERROR_INVALID_OPAQUE_CAPTURE_ADDRESS_KHR">
             <proto><type>VkResult</type> <name>vkAllocateMemory</name></proto>
             <param><type>VkDevice</type> <name>device</name></param>
             <param>const <type>VkMemoryAllocateInfo</type>* <name>pAllocateInfo</name></param>
@@ -6404,7 +6774,7 @@ typedef void <name>CAMetalLayer</name>;
             <param optional="true" externsync="true"><type>VkFence</type> <name>fence</name></param>
             <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
         </command>
-        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_DEVICE_MEMORY">
             <proto><type>VkResult</type> <name>vkResetFences</name></proto>
             <param><type>VkDevice</type> <name>device</name></param>
             <param><type>uint32_t</type> <name>fenceCount</name></param>
@@ -6459,7 +6829,7 @@ typedef void <name>CAMetalLayer</name>;
             <param><type>VkDevice</type> <name>device</name></param>
             <param externsync="true"><type>VkEvent</type> <name>event</name></param>
         </command>
-        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_DEVICE_MEMORY">
             <proto><type>VkResult</type> <name>vkResetEvent</name></proto>
             <param><type>VkDevice</type> <name>device</name></param>
             <param externsync="true"><type>VkEvent</type> <name>event</name></param>
@@ -6632,7 +7002,7 @@ typedef void <name>CAMetalLayer</name>;
             <param optional="true" externsync="true"><type>VkPipelineLayout</type> <name>pipelineLayout</name></param>
             <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
         </command>
-        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY,VK_ERROR_TOO_MANY_OBJECTS">
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
             <proto><type>VkResult</type> <name>vkCreateSampler</name></proto>
             <param><type>VkDevice</type> <name>device</name></param>
             <param>const <type>VkSamplerCreateInfo</type>* <name>pCreateInfo</name></param>
@@ -6746,7 +7116,7 @@ typedef void <name>CAMetalLayer</name>;
             <param optional="true" externsync="true"><type>VkCommandPool</type> <name>commandPool</name></param>
             <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
         </command>
-        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_DEVICE_MEMORY">
             <proto><type>VkResult</type> <name>vkResetCommandPool</name></proto>
             <param><type>VkDevice</type> <name>device</name></param>
             <param externsync="true"><type>VkCommandPool</type> <name>commandPool</name></param>
@@ -6780,7 +7150,7 @@ typedef void <name>CAMetalLayer</name>;
                 <param>the sname:VkCommandPool that pname:commandBuffer was allocated from</param>
             </implicitexternsyncparams>
         </command>
-        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_DEVICE_MEMORY">
             <proto><type>VkResult</type> <name>vkResetCommandBuffer</name></proto>
             <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
             <param optional="true"><type>VkCommandBufferResetFlags</type> <name>flags</name></param>
@@ -7323,6 +7693,19 @@ typedef void <name>CAMetalLayer</name>;
             <param><type>xcb_connection_t</type>* <name>connection</name></param>
             <param><type>xcb_visualid_t</type> <name>visual_id</name></param>
         </command>
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
+            <proto><type>VkResult</type> <name>vkCreateDirectFBSurfaceEXT</name></proto>
+            <param><type>VkInstance</type> <name>instance</name></param>
+            <param>const <type>VkDirectFBSurfaceCreateInfoEXT</type>* <name>pCreateInfo</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
+            <param><type>VkSurfaceKHR</type>* <name>pSurface</name></param>
+        </command>
+        <command>
+            <proto><type>VkBool32</type> <name>vkGetPhysicalDeviceDirectFBPresentationSupportEXT</name></proto>
+            <param><type>VkPhysicalDevice</type> <name>physicalDevice</name></param>
+            <param><type>uint32_t</type> <name>queueFamilyIndex</name></param>
+            <param><type>IDirectFB</type>* <name>dfb</name></param>
+        </command>
         <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
             <proto><type>VkResult</type> <name>vkCreateImagePipeSurfaceFUCHSIA</name></proto>
             <param><type>VkInstance</type> <name>instance</name></param>
@@ -7516,7 +7899,7 @@ typedef void <name>CAMetalLayer</name>;
             <param>const <type>VkMemoryGetWin32HandleInfoKHR</type>* <name>pGetWin32HandleInfo</name></param>
             <param><type>HANDLE</type>* <name>pHandle</name></param>
         </command>
-        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_INVALID_EXTERNAL_HANDLE">
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_INVALID_EXTERNAL_HANDLE">
             <proto><type>VkResult</type> <name>vkGetMemoryWin32HandlePropertiesKHR</name></proto>
             <param><type>VkDevice</type> <name>device</name></param>
             <param><type>VkExternalMemoryHandleTypeFlagBits</type> <name>handleType</name></param>
@@ -7529,7 +7912,7 @@ typedef void <name>CAMetalLayer</name>;
             <param>const <type>VkMemoryGetFdInfoKHR</type>* <name>pGetFdInfo</name></param>
             <param><type>int</type>* <name>pFd</name></param>
         </command>
-        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_INVALID_EXTERNAL_HANDLE">
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_INVALID_EXTERNAL_HANDLE">
             <proto><type>VkResult</type> <name>vkGetMemoryFdPropertiesKHR</name></proto>
             <param><type>VkDevice</type> <name>device</name></param>
             <param><type>VkExternalMemoryHandleTypeFlagBits</type> <name>handleType</name></param>
@@ -7599,33 +7982,33 @@ typedef void <name>CAMetalLayer</name>;
             <param><type>VkPhysicalDevice</type> <name>physicalDevice</name></param>
             <param><type>VkDisplayKHR</type> <name>display</name></param>
         </command>
-        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_INITIALIZATION_FAILED">
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_INITIALIZATION_FAILED">
             <proto><type>VkResult</type> <name>vkAcquireXlibDisplayEXT</name></proto>
             <param><type>VkPhysicalDevice</type> <name>physicalDevice</name></param>
             <param><type>Display</type>* <name>dpy</name></param>
             <param><type>VkDisplayKHR</type> <name>display</name></param>
         </command>
-        <command successcodes="VK_SUCCESS">
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY">
             <proto><type>VkResult</type> <name>vkGetRandROutputDisplayEXT</name></proto>
             <param><type>VkPhysicalDevice</type> <name>physicalDevice</name></param>
             <param><type>Display</type>* <name>dpy</name></param>
             <param><type>RROutput</type> <name>rrOutput</name></param>
             <param><type>VkDisplayKHR</type>* <name>pDisplay</name></param>
         </command>
-        <command successcodes="VK_SUCCESS">
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY">
             <proto><type>VkResult</type> <name>vkDisplayPowerControlEXT</name></proto>
             <param><type>VkDevice</type> <name>device</name></param>
             <param><type>VkDisplayKHR</type> <name>display</name></param>
             <param>const <type>VkDisplayPowerInfoEXT</type>* <name>pDisplayPowerInfo</name></param>
         </command>
-        <command successcodes="VK_SUCCESS">
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY">
             <proto><type>VkResult</type> <name>vkRegisterDeviceEventEXT</name></proto>
             <param><type>VkDevice</type> <name>device</name></param>
             <param>const <type>VkDeviceEventInfoEXT</type>* <name>pDeviceEventInfo</name></param>
             <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
             <param><type>VkFence</type>* <name>pFence</name></param>
         </command>
-        <command successcodes="VK_SUCCESS">
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY">
             <proto><type>VkResult</type> <name>vkRegisterDisplayEventEXT</name></proto>
             <param><type>VkDevice</type> <name>device</name></param>
             <param><type>VkDisplayKHR</type> <name>display</name></param>
@@ -7633,7 +8016,7 @@ typedef void <name>CAMetalLayer</name>;
             <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
             <param><type>VkFence</type>* <name>pFence</name></param>
         </command>
-        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_DEVICE_LOST,VK_ERROR_OUT_OF_DATE_KHR">
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_DEVICE_LOST,VK_ERROR_OUT_OF_DATE_KHR">
             <proto><type>VkResult</type> <name>vkGetSwapchainCounterEXT</name></proto>
             <param><type>VkDevice</type> <name>device</name></param>
             <param><type>VkSwapchainKHR</type> <name>swapchain</name></param>
@@ -7760,13 +8143,13 @@ typedef void <name>CAMetalLayer</name>;
             <param><type>VkDevice</type> <name>device</name></param>
             <param externsync="true"><type>VkSwapchainKHR</type> <name>swapchain</name></param>
         </command>
-        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_DEVICE_LOST,VK_ERROR_SURFACE_LOST_KHR">
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_DEVICE_LOST,VK_ERROR_SURFACE_LOST_KHR">
             <proto><type>VkResult</type> <name>vkGetRefreshCycleDurationGOOGLE</name></proto>
             <param><type>VkDevice</type> <name>device</name></param>
             <param externsync="true"><type>VkSwapchainKHR</type> <name>swapchain</name></param>
             <param><type>VkRefreshCycleDurationGOOGLE</type>* <name>pDisplayTimingProperties</name></param>
         </command>
-        <command successcodes="VK_SUCCESS,VK_INCOMPLETE" errorcodes="VK_ERROR_DEVICE_LOST,VK_ERROR_OUT_OF_DATE_KHR,VK_ERROR_SURFACE_LOST_KHR">
+        <command successcodes="VK_SUCCESS,VK_INCOMPLETE" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_DEVICE_LOST,VK_ERROR_OUT_OF_DATE_KHR,VK_ERROR_SURFACE_LOST_KHR">
             <proto><type>VkResult</type> <name>vkGetPastPresentationTimingGOOGLE</name></proto>
             <param><type>VkDevice</type> <name>device</name></param>
             <param externsync="true"><type>VkSwapchainKHR</type> <name>swapchain</name></param>
@@ -8053,7 +8436,7 @@ typedef void <name>CAMetalLayer</name>;
             <param><type>VkDebugUtilsMessageTypeFlagsEXT</type> <name>messageTypes</name></param>
             <param>const <type>VkDebugUtilsMessengerCallbackDataEXT</type>* <name>pCallbackData</name></param>
         </command>
-        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_INVALID_EXTERNAL_HANDLE">
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_INVALID_EXTERNAL_HANDLE">
             <proto><type>VkResult</type> <name>vkGetMemoryHostPointerPropertiesEXT</name></proto>
             <param><type>VkDevice</type> <name>device</name></param>
             <param><type>VkExternalMemoryHandleTypeFlagBits</type> <name>handleType</name></param>
@@ -8116,7 +8499,7 @@ typedef void <name>CAMetalLayer</name>;
             <param>const <type>VkSemaphoreSignalInfo</type>* <name>pSignalInfo</name></param>
         </command>
         <command name="vkSignalSemaphoreKHR"                       alias="vkSignalSemaphore"/>
-        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_INVALID_EXTERNAL_HANDLE_KHR">
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_INVALID_EXTERNAL_HANDLE_KHR">
             <proto><type>VkResult</type> <name>vkGetAndroidHardwareBufferPropertiesANDROID</name></proto>
             <param><type>VkDevice</type> <name>device</name></param>
             <param>const struct <type>AHardwareBuffer</type>* <name>buffer</name></param>
@@ -8283,12 +8666,11 @@ typedef void <name>CAMetalLayer</name>;
             <param optional="true" externsync="true"><type>VkAccelerationStructureKHR</type> <name>accelerationStructure</name></param>
             <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
         </command>
-        <command name="vkDestroyAccelerationStructureNV"                    alias="vkDestroyAccelerationStructureKHR"/>
         <command>
-            <proto><type>void</type> <name>vkGetAccelerationStructureMemoryRequirementsKHR</name></proto>
+            <proto><type>void</type> <name>vkDestroyAccelerationStructureNV</name></proto>
             <param><type>VkDevice</type> <name>device</name></param>
-            <param>const <type>VkAccelerationStructureMemoryRequirementsInfoKHR</type>* <name>pInfo</name></param>
-            <param><type>VkMemoryRequirements2</type>* <name>pMemoryRequirements</name></param>
+            <param optional="true" externsync="true"><type>VkAccelerationStructureNV</type> <name>accelerationStructure</name></param>
+            <param optional="true">const <type>VkAllocationCallbacks</type>* <name>pAllocator</name></param>
         </command>
         <command>
             <proto><type>void</type> <name>vkGetAccelerationStructureMemoryRequirementsNV</name></proto>
@@ -8297,17 +8679,16 @@ typedef void <name>CAMetalLayer</name>;
             <param><type>VkMemoryRequirements2KHR</type>* <name>pMemoryRequirements</name></param>
         </command>
         <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
-            <proto><type>VkResult</type> <name>vkBindAccelerationStructureMemoryKHR</name></proto>
+            <proto><type>VkResult</type> <name>vkBindAccelerationStructureMemoryNV</name></proto>
             <param><type>VkDevice</type> <name>device</name></param>
             <param><type>uint32_t</type> <name>bindInfoCount</name></param>
-            <param len="bindInfoCount">const <type>VkBindAccelerationStructureMemoryInfoKHR</type>* <name>pBindInfos</name></param>
+            <param len="bindInfoCount">const <type>VkBindAccelerationStructureMemoryInfoNV</type>* <name>pBindInfos</name></param>
         </command>
-        <command name="vkBindAccelerationStructureMemoryNV"                 alias="vkBindAccelerationStructureMemoryKHR"/>
         <command queues="compute" renderpass="outside" cmdbufferlevel="primary,secondary">
             <proto><type>void</type> <name>vkCmdCopyAccelerationStructureNV</name></proto>
             <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
-            <param><type>VkAccelerationStructureKHR</type> <name>dst</name></param>
-            <param><type>VkAccelerationStructureKHR</type> <name>src</name></param>
+            <param><type>VkAccelerationStructureNV</type> <name>dst</name></param>
+            <param><type>VkAccelerationStructureNV</type> <name>src</name></param>
             <param><type>VkCopyAccelerationStructureModeKHR</type> <name>mode</name></param>
         </command>
         <command queues="compute" renderpass="outside" cmdbufferlevel="primary,secondary">
@@ -8318,6 +8699,7 @@ typedef void <name>CAMetalLayer</name>;
         <command successcodes="VK_SUCCESS,VK_OPERATION_DEFERRED_KHR,VK_OPERATION_NOT_DEFERRED_KHR" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
             <proto><type>VkResult</type> <name>vkCopyAccelerationStructureKHR</name></proto>
             <param><type>VkDevice</type> <name>device</name></param>
+            <param optional="true"><type>VkDeferredOperationKHR</type> <name>deferredOperation</name></param>
             <param>const <type>VkCopyAccelerationStructureInfoKHR</type>* <name>pInfo</name></param>
         </command>
         <command queues="compute" renderpass="outside" cmdbufferlevel="primary,secondary">
@@ -8328,6 +8710,7 @@ typedef void <name>CAMetalLayer</name>;
         <command successcodes="VK_SUCCESS,VK_OPERATION_DEFERRED_KHR,VK_OPERATION_NOT_DEFERRED_KHR" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
             <proto><type>VkResult</type> <name>vkCopyAccelerationStructureToMemoryKHR</name></proto>
             <param><type>VkDevice</type> <name>device</name></param>
+            <param optional="true"><type>VkDeferredOperationKHR</type> <name>deferredOperation</name></param>
             <param>const <type>VkCopyAccelerationStructureToMemoryInfoKHR</type>* <name>pInfo</name></param>
         </command>
         <command queues="compute" renderpass="outside" cmdbufferlevel="primary,secondary">
@@ -8338,6 +8721,7 @@ typedef void <name>CAMetalLayer</name>;
         <command successcodes="VK_SUCCESS,VK_OPERATION_DEFERRED_KHR,VK_OPERATION_NOT_DEFERRED_KHR" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
             <proto><type>VkResult</type> <name>vkCopyMemoryToAccelerationStructureKHR</name></proto>
             <param><type>VkDevice</type> <name>device</name></param>
+            <param optional="true"><type>VkDeferredOperationKHR</type> <name>deferredOperation</name></param>
             <param>const <type>VkCopyMemoryToAccelerationStructureInfoKHR</type>* <name>pInfo</name></param>
         </command>
         <command queues="compute" renderpass="outside" cmdbufferlevel="primary,secondary">
@@ -8349,7 +8733,15 @@ typedef void <name>CAMetalLayer</name>;
             <param><type>VkQueryPool</type> <name>queryPool</name></param>
             <param><type>uint32_t</type> <name>firstQuery</name></param>
         </command>
-        <command name="vkCmdWriteAccelerationStructuresPropertiesNV"        alias="vkCmdWriteAccelerationStructuresPropertiesKHR"/>
+        <command queues="compute" renderpass="outside" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdWriteAccelerationStructuresPropertiesNV</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>uint32_t</type> <name>accelerationStructureCount</name></param>
+            <param len="accelerationStructureCount">const <type>VkAccelerationStructureNV</type>* <name>pAccelerationStructures</name></param>
+            <param><type>VkQueryType</type> <name>queryType</name></param>
+            <param><type>VkQueryPool</type> <name>queryPool</name></param>
+            <param><type>uint32_t</type> <name>firstQuery</name></param>
+        </command>
         <command queues="compute" renderpass="outside" cmdbufferlevel="primary,secondary">
             <proto><type>void</type> <name>vkCmdBuildAccelerationStructureNV</name></proto>
             <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
@@ -8357,8 +8749,8 @@ typedef void <name>CAMetalLayer</name>;
             <param optional="true"><type>VkBuffer</type> <name>instanceData</name></param>
             <param><type>VkDeviceSize</type> <name>instanceOffset</name></param>
             <param><type>VkBool32</type> <name>update</name></param>
-            <param><type>VkAccelerationStructureKHR</type> <name>dst</name></param>
-            <param optional="true"><type>VkAccelerationStructureKHR</type> <name>src</name></param>
+            <param><type>VkAccelerationStructureNV</type> <name>dst</name></param>
+            <param optional="true"><type>VkAccelerationStructureNV</type> <name>src</name></param>
             <param><type>VkBuffer</type> <name>scratch</name></param>
             <param><type>VkDeviceSize</type> <name>scratchOffset</name></param>
         </command>
@@ -8375,10 +8767,10 @@ typedef void <name>CAMetalLayer</name>;
         <command queues="compute" renderpass="outside" cmdbufferlevel="primary,secondary">
             <proto><type>void</type> <name>vkCmdTraceRaysKHR</name></proto>
             <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
-            <param>const <type>VkStridedBufferRegionKHR</type>* <name>pRaygenShaderBindingTable</name></param>
-            <param>const <type>VkStridedBufferRegionKHR</type>* <name>pMissShaderBindingTable</name></param>
-            <param>const <type>VkStridedBufferRegionKHR</type>* <name>pHitShaderBindingTable</name></param>
-            <param>const <type>VkStridedBufferRegionKHR</type>* <name>pCallableShaderBindingTable</name></param>
+            <param>const <type>VkStridedDeviceAddressRegionKHR</type>* <name>pRaygenShaderBindingTable</name></param>
+            <param>const <type>VkStridedDeviceAddressRegionKHR</type>* <name>pMissShaderBindingTable</name></param>
+            <param>const <type>VkStridedDeviceAddressRegionKHR</type>* <name>pHitShaderBindingTable</name></param>
+            <param>const <type>VkStridedDeviceAddressRegionKHR</type>* <name>pCallableShaderBindingTable</name></param>
             <param><type>uint32_t</type> <name>width</name></param>
             <param><type>uint32_t</type> <name>height</name></param>
             <param><type>uint32_t</type> <name>depth</name></param>
@@ -8423,7 +8815,7 @@ typedef void <name>CAMetalLayer</name>;
         <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
             <proto><type>VkResult</type> <name>vkGetAccelerationStructureHandleNV</name></proto>
             <param><type>VkDevice</type> <name>device</name></param>
-            <param><type>VkAccelerationStructureKHR</type> <name>accelerationStructure</name></param>
+            <param><type>VkAccelerationStructureNV</type> <name>accelerationStructure</name></param>
             <param><type>size_t</type> <name>dataSize</name></param>
             <param len="dataSize"><type>void</type>* <name>pData</name></param>
         </command>
@@ -8439,6 +8831,7 @@ typedef void <name>CAMetalLayer</name>;
         <command successcodes="VK_SUCCESS,VK_OPERATION_DEFERRED_KHR,VK_OPERATION_NOT_DEFERRED_KHR,VK_PIPELINE_COMPILE_REQUIRED_EXT" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY,VK_ERROR_INVALID_OPAQUE_CAPTURE_ADDRESS">
             <proto><type>VkResult</type> <name>vkCreateRayTracingPipelinesKHR</name></proto>
             <param><type>VkDevice</type> <name>device</name></param>
+            <param optional="true"><type>VkDeferredOperationKHR</type> <name>deferredOperation</name></param>
             <param optional="true"><type>VkPipelineCache</type> <name>pipelineCache</name></param>
             <param><type>uint32_t</type> <name>createInfoCount</name></param>
             <param len="createInfoCount">const <type>VkRayTracingPipelineCreateInfoKHR</type>* <name>pCreateInfos</name></param>
@@ -8454,24 +8847,36 @@ typedef void <name>CAMetalLayer</name>;
         <command queues="compute" renderpass="outside" cmdbufferlevel="primary,secondary">
             <proto><type>void</type> <name>vkCmdTraceRaysIndirectKHR</name></proto>
             <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
-            <param>const <type>VkStridedBufferRegionKHR</type>* <name>pRaygenShaderBindingTable</name></param>
-            <param>const <type>VkStridedBufferRegionKHR</type>* <name>pMissShaderBindingTable</name></param>
-            <param>const <type>VkStridedBufferRegionKHR</type>* <name>pHitShaderBindingTable</name></param>
-            <param>const <type>VkStridedBufferRegionKHR</type>* <name>pCallableShaderBindingTable</name></param>
-            <param><type>VkBuffer</type> <name>buffer</name></param>
-            <param><type>VkDeviceSize</type> <name>offset</name></param>
+            <param>const <type>VkStridedDeviceAddressRegionKHR</type>* <name>pRaygenShaderBindingTable</name></param>
+            <param>const <type>VkStridedDeviceAddressRegionKHR</type>* <name>pMissShaderBindingTable</name></param>
+            <param>const <type>VkStridedDeviceAddressRegionKHR</type>* <name>pHitShaderBindingTable</name></param>
+            <param>const <type>VkStridedDeviceAddressRegionKHR</type>* <name>pCallableShaderBindingTable</name></param>
+            <param><type>VkDeviceAddress</type> <name>indirectDeviceAddress</name></param>
         </command>
-        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_INCOMPATIBLE_VERSION_KHR">
-            <proto><type>VkResult</type> <name>vkGetDeviceAccelerationStructureCompatibilityKHR</name></proto>
+        <command>
+            <proto><type>void</type> <name>vkGetDeviceAccelerationStructureCompatibilityKHR</name></proto>
             <param><type>VkDevice</type> <name>device</name></param>
-            <param>const <type>VkAccelerationStructureVersionKHR</type>* <name>version</name></param>
+            <param>const <type>VkAccelerationStructureVersionInfoKHR</type>* <name>pVersionInfo</name></param>
+            <param><type>VkAccelerationStructureCompatibilityKHR</type>* <name>pCompatibility</name></param>
+        </command>
+        <command>
+            <proto><type>VkDeviceSize</type> <name>vkGetRayTracingShaderGroupStackSizeKHR</name></proto>
+            <param><type>VkDevice</type> <name>device</name></param>
+            <param><type>VkPipeline</type> <name>pipeline</name></param>
+            <param><type>uint32_t</type> <name>group</name></param>
+            <param><type>VkShaderGroupShaderKHR</type> <name>groupShader</name></param>
+        </command>
+        <command queues="compute" renderpass="outside" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdSetRayTracingPipelineStackSizeKHR</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>uint32_t</type> <name>pipelineStackSize</name></param>
         </command>
         <command>
             <proto><type>uint32_t</type> <name>vkGetImageViewHandleNVX</name></proto>
             <param><type>VkDevice</type> <name>device</name></param>
             <param>const <type>VkImageViewHandleInfoNVX</type>* <name>pInfo</name></param>
         </command>
-        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_UNKNOWN">
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_UNKNOWN">
             <proto><type>VkResult</type> <name>vkGetImageViewAddressNVX</name></proto>
             <param><type>VkDevice</type> <name>device</name></param>
             <param><type>VkImageView</type> <name>imageView</name></param>
@@ -8514,7 +8919,7 @@ typedef void <name>CAMetalLayer</name>;
             <param>const <type>VkQueryPoolPerformanceCreateInfoKHR</type>* <name>pPerformanceQueryCreateInfo</name></param>
             <param><type>uint32_t</type>* <name>pNumPasses</name></param>
         </command>
-        <command successcodes="VK_SUCCESS" errorcodes="VK_TIMEOUT">
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_TIMEOUT">
             <proto><type>VkResult</type> <name>vkAcquireProfilingLockKHR</name></proto>
             <param><type>VkDevice</type> <name>device</name></param>
             <param>const <type>VkAcquireProfilingLockInfoKHR</type>* <name>pInfo</name></param>
@@ -8523,7 +8928,7 @@ typedef void <name>CAMetalLayer</name>;
             <proto><type>void</type> <name>vkReleaseProfilingLockKHR</name></proto>
             <param><type>VkDevice</type> <name>device</name></param>
         </command>
-        <command successcodes="VK_SUCCESS">
+        <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY">
             <proto><type>VkResult</type> <name>vkGetImageDrmFormatModifierPropertiesEXT</name></proto>
             <param><type>VkDevice</type> <name>device</name></param>
             <param><type>VkImage</type> <name>image</name></param>
@@ -8588,7 +8993,7 @@ typedef void <name>CAMetalLayer</name>;
         <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_TOO_MANY_OBJECTS,VK_ERROR_OUT_OF_HOST_MEMORY">
             <proto><type>VkResult</type> <name>vkReleasePerformanceConfigurationINTEL</name></proto>
             <param><type>VkDevice</type> <name>device</name></param>
-            <param><type>VkPerformanceConfigurationINTEL</type> <name>configuration</name></param>
+            <param optional="true" externsync="true"><type>VkPerformanceConfigurationINTEL</type> <name>configuration</name></param>
         </command>
         <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_TOO_MANY_OBJECTS,VK_ERROR_OUT_OF_HOST_MEMORY">
             <proto><type>VkResult</type> <name>vkQueueSetPerformanceConfigurationINTEL</name></proto>
@@ -8634,7 +9039,7 @@ typedef void <name>CAMetalLayer</name>;
             <param><type>uint32_t</type> <name>lineStippleFactor</name></param>
             <param><type>uint16_t</type> <name>lineStipplePattern</name></param>
         </command>
-        <command successcodes="VK_SUCCESS,VK_INCOMPLETE">
+        <command successcodes="VK_SUCCESS,VK_INCOMPLETE" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY">
             <proto><type>VkResult</type> <name>vkGetPhysicalDeviceToolPropertiesEXT</name></proto>
             <param><type>VkPhysicalDevice</type> <name>physicalDevice</name></param>
             <param optional="false,true"><type>uint32_t</type>* <name>pToolCount</name></param>
@@ -8648,26 +9053,28 @@ typedef void <name>CAMetalLayer</name>;
             <param><type>VkAccelerationStructureKHR</type>*                        <name>pAccelerationStructure</name></param>
         </command>
         <command queues="compute" renderpass="outside" cmdbufferlevel="primary,secondary">
-            <proto><type>void</type> <name>vkCmdBuildAccelerationStructureKHR</name></proto>
+            <proto><type>void</type> <name>vkCmdBuildAccelerationStructuresKHR</name></proto>
             <param externsync="true"><type>VkCommandBuffer</type>                                    <name>commandBuffer</name></param>
             <param><type>uint32_t</type> <name>infoCount</name></param>
             <param len="infoCount">const <type>VkAccelerationStructureBuildGeometryInfoKHR</type>* <name>pInfos</name></param>
-            <param len="infoCount">const <type>VkAccelerationStructureBuildOffsetInfoKHR</type>* const* <name>ppOffsetInfos</name></param>
+            <param len="infoCount">const <type>VkAccelerationStructureBuildRangeInfoKHR</type>* const* <name>ppBuildRangeInfos</name></param>
         </command>
         <command queues="compute" renderpass="outside" cmdbufferlevel="primary,secondary">
-            <proto><type>void</type> <name>vkCmdBuildAccelerationStructureIndirectKHR</name></proto>
+            <proto><type>void</type> <name>vkCmdBuildAccelerationStructuresIndirectKHR</name></proto>
             <param externsync="true"><type>VkCommandBuffer</type>                  <name>commandBuffer</name></param>
-            <param>const <type>VkAccelerationStructureBuildGeometryInfoKHR</type>* <name>pInfo</name></param>
-            <param><type>VkBuffer</type>                                           <name>indirectBuffer</name></param>
-            <param><type>VkDeviceSize</type>                                       <name>indirectOffset</name></param>
-            <param><type>uint32_t</type>                                           <name>indirectStride</name></param>
+            <param><type>uint32_t</type>                                           <name>infoCount</name></param>
+            <param len="infoCount">const <type>VkAccelerationStructureBuildGeometryInfoKHR</type>* <name>pInfos</name></param>
+            <param len="infoCount">const <type>VkDeviceAddress</type>*             <name>pIndirectDeviceAddresses</name></param>
+            <param len="infoCount">const <type>uint32_t</type>*                    <name>pIndirectStrides</name></param>
+            <param len="infoCount">const <type>uint32_t</type>* const*             <name>ppMaxPrimitiveCounts</name></param>
         </command>
         <command successcodes="VK_SUCCESS,VK_OPERATION_DEFERRED_KHR,VK_OPERATION_NOT_DEFERRED_KHR" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY,VK_ERROR_OUT_OF_DEVICE_MEMORY">
-            <proto><type>VkResult</type> <name>vkBuildAccelerationStructureKHR</name></proto>
+            <proto><type>VkResult</type> <name>vkBuildAccelerationStructuresKHR</name></proto>
             <param><type>VkDevice</type>                                           <name>device</name></param>
+            <param optional="true"><type>VkDeferredOperationKHR</type> <name>deferredOperation</name></param>
             <param><type>uint32_t</type> <name>infoCount</name></param>
             <param len="infoCount">const <type>VkAccelerationStructureBuildGeometryInfoKHR</type>* <name>pInfos</name></param>
-            <param len="infoCount">const <type>VkAccelerationStructureBuildOffsetInfoKHR</type>* const* <name>ppOffsetInfos</name></param>
+            <param len="infoCount">const <type>VkAccelerationStructureBuildRangeInfoKHR</type>* const* <name>ppBuildRangeInfos</name></param>
         </command>
         <command>
             <proto><type>VkDeviceAddress</type> <name>vkGetAccelerationStructureDeviceAddressKHR</name></proto>
@@ -8701,6 +9108,77 @@ typedef void <name>CAMetalLayer</name>;
            <param><type>VkDevice</type> <name>device</name></param>
            <param><type>VkDeferredOperationKHR</type> <name>operation</name></param>
         </command>
+        <command queues="graphics" renderpass="both" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdSetCullModeEXT</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param optional="true"><type>VkCullModeFlags</type> <name>cullMode</name></param>
+        </command>
+        <command queues="graphics" renderpass="both" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdSetFrontFaceEXT</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>VkFrontFace</type> <name>frontFace</name></param>
+        </command>
+        <command queues="graphics" renderpass="both" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdSetPrimitiveTopologyEXT</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>VkPrimitiveTopology</type> <name>primitiveTopology</name></param>
+        </command>
+        <command queues="graphics" renderpass="both" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdSetViewportWithCountEXT</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>uint32_t</type> <name>viewportCount</name></param>
+            <param len="viewportCount">const <type>VkViewport</type>* <name>pViewports</name></param>
+        </command>
+        <command queues="graphics" renderpass="both" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdSetScissorWithCountEXT</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>uint32_t</type> <name>scissorCount</name></param>
+            <param len="scissorCount">const <type>VkRect2D</type>* <name>pScissors</name></param>
+        </command>
+        <command queues="graphics" renderpass="both" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdBindVertexBuffers2EXT</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>uint32_t</type> <name>firstBinding</name></param>
+            <param><type>uint32_t</type> <name>bindingCount</name></param>
+            <param len="bindingCount">const <type>VkBuffer</type>* <name>pBuffers</name></param>
+            <param len="bindingCount">const <type>VkDeviceSize</type>* <name>pOffsets</name></param>
+            <param optional="true" len="bindingCount">const <type>VkDeviceSize</type>* <name>pSizes</name></param>
+            <param optional="true" len="bindingCount">const <type>VkDeviceSize</type>* <name>pStrides</name></param>
+        </command>
+        <command queues="graphics" renderpass="both" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdSetDepthTestEnableEXT</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>VkBool32</type> <name>depthTestEnable</name></param>
+        </command>
+        <command queues="graphics" renderpass="both" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdSetDepthWriteEnableEXT</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>VkBool32</type> <name>depthWriteEnable</name></param>
+        </command>
+        <command queues="graphics" renderpass="both" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdSetDepthCompareOpEXT</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>VkCompareOp</type> <name>depthCompareOp</name></param>
+        </command>
+        <command queues="graphics" renderpass="both" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdSetDepthBoundsTestEnableEXT</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>VkBool32</type> <name>depthBoundsTestEnable</name></param>
+        </command>
+        <command queues="graphics" renderpass="both" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdSetStencilTestEnableEXT</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>VkBool32</type> <name>stencilTestEnable</name></param>
+        </command>
+        <command queues="graphics" renderpass="both" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdSetStencilOpEXT</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param><type>VkStencilFaceFlags</type> <name>faceMask</name></param>
+            <param><type>VkStencilOp</type> <name>failOp</name></param>
+            <param><type>VkStencilOp</type> <name>passOp</name></param>
+            <param><type>VkStencilOp</type> <name>depthFailOp</name></param>
+            <param><type>VkCompareOp</type> <name>compareOp</name></param>
+        </command>
         <command successcodes="VK_SUCCESS" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY">
             <proto><type>VkResult</type> <name>vkCreatePrivateDataSlotEXT</name></proto>
             <param><type>VkDevice</type> <name>device</name></param>
@@ -8730,6 +9208,62 @@ typedef void <name>CAMetalLayer</name>;
             <param><type>VkPrivateDataSlotEXT</type> <name>privateDataSlot</name></param>
             <param><type>uint64_t</type>* <name>pData</name></param>
         </command>
+        <command queues="transfer,graphics,compute" renderpass="outside" cmdbufferlevel="primary,secondary" pipeline="transfer">
+            <proto><type>void</type> <name>vkCmdCopyBuffer2KHR</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param>const <type>VkCopyBufferInfo2KHR</type>* <name>pCopyBufferInfo</name></param>
+        </command>
+        <command queues="transfer,graphics,compute" renderpass="outside" cmdbufferlevel="primary,secondary" pipeline="transfer">
+            <proto><type>void</type> <name>vkCmdCopyImage2KHR</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param>const <type>VkCopyImageInfo2KHR</type>* <name>pCopyImageInfo</name></param>
+        </command>
+        <command queues="graphics" renderpass="outside" cmdbufferlevel="primary,secondary" pipeline="transfer">
+            <proto><type>void</type> <name>vkCmdBlitImage2KHR</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param>const <type>VkBlitImageInfo2KHR</type>* <name>pBlitImageInfo</name></param>
+        </command>
+        <command queues="transfer,graphics,compute" renderpass="outside" cmdbufferlevel="primary,secondary" pipeline="transfer">
+            <proto><type>void</type> <name>vkCmdCopyBufferToImage2KHR</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param>const <type>VkCopyBufferToImageInfo2KHR</type>* <name>pCopyBufferToImageInfo</name></param>
+        </command>
+        <command queues="transfer,graphics,compute" renderpass="outside" cmdbufferlevel="primary,secondary" pipeline="transfer">
+            <proto><type>void</type> <name>vkCmdCopyImageToBuffer2KHR</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param>const <type>VkCopyImageToBufferInfo2KHR</type>* <name>pCopyImageToBufferInfo</name></param>
+        </command>
+        <command queues="graphics" renderpass="outside" cmdbufferlevel="primary,secondary" pipeline="transfer">
+            <proto><type>void</type> <name>vkCmdResolveImage2KHR</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type> <name>commandBuffer</name></param>
+            <param>const <type>VkResolveImageInfo2KHR</type>* <name>pResolveImageInfo</name></param>
+        </command>
+        <command queues="graphics" renderpass="both" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdSetFragmentShadingRateKHR</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type>           <name>commandBuffer</name></param>
+            <param>const <type>VkExtent2D</type>*                           <name>pFragmentSize</name></param>
+            <param>const <type>VkFragmentShadingRateCombinerOpKHR</type>    <name>combinerOps</name>[2]</param>
+        </command>
+        <command successcodes="VK_SUCCESS,VK_INCOMPLETE" errorcodes="VK_ERROR_OUT_OF_HOST_MEMORY">
+            <proto><type>VkResult</type> <name>vkGetPhysicalDeviceFragmentShadingRatesKHR</name></proto>
+            <param><type>VkPhysicalDevice</type> <name>physicalDevice</name></param>
+            <param optional="false,true"><type>uint32_t</type>* <name>pFragmentShadingRateCount</name></param>
+            <param optional="true" len="pFragmentShadingRateCount"><type>VkPhysicalDeviceFragmentShadingRateKHR</type>* <name>pFragmentShadingRates</name></param>
+        </command>
+        <command queues="graphics" renderpass="both" cmdbufferlevel="primary,secondary">
+            <proto><type>void</type> <name>vkCmdSetFragmentShadingRateEnumNV</name></proto>
+            <param externsync="true"><type>VkCommandBuffer</type>           <name>commandBuffer</name></param>
+            <param><type>VkFragmentShadingRateNV</type>                     <name>shadingRate</name></param>
+            <param>const <type>VkFragmentShadingRateCombinerOpKHR</type>    <name>combinerOps</name>[2]</param>
+        </command>
+        <command>
+            <proto><type>void</type> <name>vkGetAccelerationStructureBuildSizesKHR</name></proto>
+            <param><type>VkDevice</type>                                            <name>device</name></param>
+            <param><type>VkAccelerationStructureBuildTypeKHR</type>                 <name>buildType</name></param>
+            <param>const <type>VkAccelerationStructureBuildGeometryInfoKHR</type>*  <name>pBuildInfo</name></param>
+            <param len="pBuildInfo-&gt;geometryCount">const <type>uint32_t</type>*  <name>pMaxPrimitiveCounts</name></param>
+            <param><type>VkAccelerationStructureBuildSizesInfoKHR</type>*           <name>pSizeInfo</name></param>
+        </command>
     </commands>
 
     <feature api="vulkan" name="VK_VERSION_1_0" number="1.0" comment="Vulkan core API interface definitions">
@@ -11268,9 +11802,9 @@ typedef void <name>CAMetalLayer</name>;
                 <command name="vkGetDisplayPlaneCapabilities2KHR"/>
             </require>
         </extension>
-        <extension name="VK_MVK_ios_surface" number="123" type="instance" requires="VK_KHR_surface" platform="ios" supported="vulkan" author="MVK" contact="Bill Hollings @billhollings">
+        <extension name="VK_MVK_ios_surface" number="123" type="instance" requires="VK_KHR_surface" platform="ios" supported="vulkan" author="MVK" contact="Bill Hollings @billhollings" deprecatedby="VK_EXT_metal_surface">
             <require>
-                <enum value="2"                                             name="VK_MVK_IOS_SURFACE_SPEC_VERSION"/>
+                <enum value="3"                                             name="VK_MVK_IOS_SURFACE_SPEC_VERSION"/>
                 <enum value="&quot;VK_MVK_ios_surface&quot;"                name="VK_MVK_IOS_SURFACE_EXTENSION_NAME"/>
                 <enum offset="0" extends="VkStructureType"                  name="VK_STRUCTURE_TYPE_IOS_SURFACE_CREATE_INFO_MVK"/>
                 <type name="VkIOSSurfaceCreateFlagsMVK"/>
@@ -11278,9 +11812,9 @@ typedef void <name>CAMetalLayer</name>;
                 <command name="vkCreateIOSSurfaceMVK"/>
             </require>
         </extension>
-        <extension name="VK_MVK_macos_surface" number="124" type="instance" requires="VK_KHR_surface" platform="macos" supported="vulkan" author="MVK" contact="Bill Hollings @billhollings">
+        <extension name="VK_MVK_macos_surface" number="124" type="instance" requires="VK_KHR_surface" platform="macos" supported="vulkan" author="MVK" contact="Bill Hollings @billhollings" deprecatedby="VK_EXT_metal_surface">
             <require>
-                <enum value="2"                                             name="VK_MVK_MACOS_SURFACE_SPEC_VERSION"/>
+                <enum value="3"                                             name="VK_MVK_MACOS_SURFACE_SPEC_VERSION"/>
                 <enum value="&quot;VK_MVK_macos_surface&quot;"              name="VK_MVK_MACOS_SURFACE_EXTENSION_NAME"/>
                 <enum offset="0" extends="VkStructureType"                  name="VK_STRUCTURE_TYPE_MACOS_SURFACE_CREATE_INFO_MVK"/>
                 <type name="VkMacOSSurfaceCreateFlagsMVK"/>
@@ -11599,65 +12133,41 @@ typedef void <name>CAMetalLayer</name>;
                 <type name="VkPipelineCoverageToColorStateCreateInfoNV"/>
             </require>
         </extension>
-        <extension name="VK_KHR_ray_tracing" number="151" type="device" requires="VK_KHR_get_physical_device_properties2,VK_KHR_get_memory_requirements2,VK_EXT_descriptor_indexing,VK_KHR_buffer_device_address,VK_KHR_deferred_host_operations,VK_KHR_pipeline_library" author="KHR" contact="Daniel Koch @dgkoch" platform="provisional" supported="vulkan" provisional="true" sortorder="1" comment="Explicit sort order to require processing after VK_NV_ray_tracing">
+        <extension name="VK_KHR_acceleration_structure" number="151" type="device" requiresCore="1.1" requires="VK_EXT_descriptor_indexing,VK_KHR_buffer_device_address,VK_KHR_deferred_host_operations" author="KHR" contact="Daniel Koch @dgkoch" supported="vulkan" sortorder="1">
             <require>
-                <enum value="8"                                             name="VK_KHR_RAY_TRACING_SPEC_VERSION"/>
-                <enum value="&quot;VK_KHR_ray_tracing&quot;"                name="VK_KHR_RAY_TRACING_EXTENSION_NAME"/>
-                <enum                                                       name="VK_SHADER_UNUSED_KHR"/>
-                <enum offset="6"  extends="VkStructureType" extnumber="166" name="VK_STRUCTURE_TYPE_BIND_ACCELERATION_STRUCTURE_MEMORY_INFO_KHR"/>
-                <enum offset="7"  extends="VkStructureType" extnumber="166" name="VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET_ACCELERATION_STRUCTURE_KHR"/>
+                <enum value="11"                                            name="VK_KHR_ACCELERATION_STRUCTURE_SPEC_VERSION"/>
+                <enum value="&quot;VK_KHR_acceleration_structure&quot;"     name="VK_KHR_ACCELERATION_STRUCTURE_EXTENSION_NAME"/>
+                <enum offset="7"  extends="VkStructureType"                 name="VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET_ACCELERATION_STRUCTURE_KHR"/>
                 <enum offset="0"  extends="VkStructureType"                 name="VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_BUILD_GEOMETRY_INFO_KHR"/>
-                <enum offset="1"  extends="VkStructureType"                 name="VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_CREATE_GEOMETRY_TYPE_INFO_KHR"/>
                 <enum offset="2"  extends="VkStructureType"                 name="VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_DEVICE_ADDRESS_INFO_KHR"/>
                 <enum offset="3"  extends="VkStructureType"                 name="VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_GEOMETRY_AABBS_DATA_KHR"/>
                 <enum offset="4"  extends="VkStructureType"                 name="VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_GEOMETRY_INSTANCES_DATA_KHR"/>
                 <enum offset="5"  extends="VkStructureType"                 name="VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_GEOMETRY_TRIANGLES_DATA_KHR"/>
                 <enum offset="6"  extends="VkStructureType"                 name="VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_GEOMETRY_KHR"/>
-                <enum offset="8"  extends="VkStructureType"                 name="VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_MEMORY_REQUIREMENTS_INFO_KHR"/>
-                <enum offset="9"  extends="VkStructureType"                 name="VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_VERSION_KHR"/>
+                <enum offset="9"  extends="VkStructureType"                 name="VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_VERSION_INFO_KHR"/>
                 <enum offset="10" extends="VkStructureType"                 name="VK_STRUCTURE_TYPE_COPY_ACCELERATION_STRUCTURE_INFO_KHR"/>
                 <enum offset="11" extends="VkStructureType"                 name="VK_STRUCTURE_TYPE_COPY_ACCELERATION_STRUCTURE_TO_MEMORY_INFO_KHR"/>
                 <enum offset="12" extends="VkStructureType"                 name="VK_STRUCTURE_TYPE_COPY_MEMORY_TO_ACCELERATION_STRUCTURE_INFO_KHR"/>
-                <enum offset="13" extends="VkStructureType"                 name="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_RAY_TRACING_FEATURES_KHR"/>
-                <enum offset="14" extends="VkStructureType"                 name="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_RAY_TRACING_PROPERTIES_KHR"/>
-                <enum offset="15" extends="VkStructureType"                 name="VK_STRUCTURE_TYPE_RAY_TRACING_PIPELINE_CREATE_INFO_KHR"/>
-                <enum offset="16" extends="VkStructureType"                 name="VK_STRUCTURE_TYPE_RAY_TRACING_SHADER_GROUP_CREATE_INFO_KHR"/>
+                <enum offset="13" extends="VkStructureType"                 name="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_ACCELERATION_STRUCTURE_FEATURES_KHR"/>
+                <enum offset="14" extends="VkStructureType"                 name="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_ACCELERATION_STRUCTURE_PROPERTIES_KHR"/>
                 <enum offset="17" extends="VkStructureType"                 name="VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_CREATE_INFO_KHR"/>
-                <enum offset="18" extends="VkStructureType"                 name="VK_STRUCTURE_TYPE_RAY_TRACING_PIPELINE_INTERFACE_CREATE_INFO_KHR"/>
-                <enum bitpos="8"  extends="VkShaderStageFlagBits"           name="VK_SHADER_STAGE_RAYGEN_BIT_KHR"/>
-                <enum bitpos="9"  extends="VkShaderStageFlagBits"           name="VK_SHADER_STAGE_ANY_HIT_BIT_KHR"/>
-                <enum bitpos="10" extends="VkShaderStageFlagBits"           name="VK_SHADER_STAGE_CLOSEST_HIT_BIT_KHR"/>
-                <enum bitpos="11" extends="VkShaderStageFlagBits"           name="VK_SHADER_STAGE_MISS_BIT_KHR"/>
-                <enum bitpos="12" extends="VkShaderStageFlagBits"           name="VK_SHADER_STAGE_INTERSECTION_BIT_KHR"/>
-                <enum bitpos="13" extends="VkShaderStageFlagBits"           name="VK_SHADER_STAGE_CALLABLE_BIT_KHR"/>
-                <enum bitpos="21" extends="VkPipelineStageFlagBits"         name="VK_PIPELINE_STAGE_RAY_TRACING_SHADER_BIT_KHR"/>
+                <enum offset="20" extends="VkStructureType"                 name="VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_BUILD_SIZES_INFO_KHR"/>
                 <enum bitpos="25" extends="VkPipelineStageFlagBits"         name="VK_PIPELINE_STAGE_ACCELERATION_STRUCTURE_BUILD_BIT_KHR"/>
-                <enum bitpos="10" extends="VkBufferUsageFlagBits"           name="VK_BUFFER_USAGE_RAY_TRACING_BIT_KHR"/>
-                <enum offset="0"  extends="VkPipelineBindPoint" extnumber="166" name="VK_PIPELINE_BIND_POINT_RAY_TRACING_KHR"/>
-                <enum offset="0"  extends="VkDescriptorType" extnumber="166" name="VK_DESCRIPTOR_TYPE_ACCELERATION_STRUCTURE_KHR"/>
+                <enum offset="0"  extends="VkDescriptorType"                name="VK_DESCRIPTOR_TYPE_ACCELERATION_STRUCTURE_KHR"/>
                 <enum bitpos="21" extends="VkAccessFlagBits"                name="VK_ACCESS_ACCELERATION_STRUCTURE_READ_BIT_KHR"/>
                 <enum bitpos="22" extends="VkAccessFlagBits"                name="VK_ACCESS_ACCELERATION_STRUCTURE_WRITE_BIT_KHR"/>
-                <enum offset="0"  extends="VkQueryType" extnumber="166"     name="VK_QUERY_TYPE_ACCELERATION_STRUCTURE_COMPACTED_SIZE_KHR"/>
-                <enum offset="0"  extends="VkQueryType"                     name="VK_QUERY_TYPE_ACCELERATION_STRUCTURE_SERIALIZATION_SIZE_KHR"/>
-                <enum offset="0"  extends="VkObjectType" extnumber="166"    name="VK_OBJECT_TYPE_ACCELERATION_STRUCTURE_KHR"/>
-                <enum offset="0"  extends="VkDebugReportObjectTypeEXT" extnumber="166" name="VK_DEBUG_REPORT_OBJECT_TYPE_ACCELERATION_STRUCTURE_KHR_EXT"/>
+                <enum offset="0"  extends="VkQueryType"                     name="VK_QUERY_TYPE_ACCELERATION_STRUCTURE_COMPACTED_SIZE_KHR"/>
+                <enum offset="1"  extends="VkQueryType"                     name="VK_QUERY_TYPE_ACCELERATION_STRUCTURE_SERIALIZATION_SIZE_KHR"/>
+                <enum offset="0"  extends="VkObjectType"                    name="VK_OBJECT_TYPE_ACCELERATION_STRUCTURE_KHR"/>
+                <enum offset="0"  extends="VkDebugReportObjectTypeEXT"      name="VK_DEBUG_REPORT_OBJECT_TYPE_ACCELERATION_STRUCTURE_KHR_EXT"/>
                 <enum offset="0"  extends="VkIndexType" extnumber="166"     name="VK_INDEX_TYPE_NONE_KHR"/>
-                <enum offset="0"  extends="VkGeometryTypeKHR"               name="VK_GEOMETRY_TYPE_INSTANCES_KHR"/>
-                <enum offset="0"  extends="VkResult" dir="-"                name="VK_ERROR_INCOMPATIBLE_VERSION_KHR"/>
                 <enum bitpos="29" extends="VkFormatFeatureFlagBits"         name="VK_FORMAT_FEATURE_ACCELERATION_STRUCTURE_VERTEX_BUFFER_BIT_KHR"/>
-                <enum bitpos="14" extends="VkPipelineCreateFlagBits"        name="VK_PIPELINE_CREATE_RAY_TRACING_NO_NULL_ANY_HIT_SHADERS_BIT_KHR"/>
-                <enum bitpos="15" extends="VkPipelineCreateFlagBits"        name="VK_PIPELINE_CREATE_RAY_TRACING_NO_NULL_CLOSEST_HIT_SHADERS_BIT_KHR"/>
-                <enum bitpos="16" extends="VkPipelineCreateFlagBits"        name="VK_PIPELINE_CREATE_RAY_TRACING_NO_NULL_MISS_SHADERS_BIT_KHR"/>
-                <enum bitpos="17" extends="VkPipelineCreateFlagBits"        name="VK_PIPELINE_CREATE_RAY_TRACING_NO_NULL_INTERSECTION_SHADERS_BIT_KHR"/>
-                <enum bitpos="12" extends="VkPipelineCreateFlagBits"        name="VK_PIPELINE_CREATE_RAY_TRACING_SKIP_TRIANGLES_BIT_KHR"/>
-                <enum bitpos="13" extends="VkPipelineCreateFlagBits"        name="VK_PIPELINE_CREATE_RAY_TRACING_SKIP_AABBS_BIT_KHR"/>
+                <enum bitpos="19" extends="VkBufferUsageFlagBits"           name="VK_BUFFER_USAGE_ACCELERATION_STRUCTURE_BUILD_INPUT_READ_ONLY_BIT_KHR"/>
+                <enum bitpos="20" extends="VkBufferUsageFlagBits"           name="VK_BUFFER_USAGE_ACCELERATION_STRUCTURE_STORAGE_BIT_KHR"/>
                 <type name="VkAccelerationStructureTypeKHR"/>
                 <type name="VkDeviceOrHostAddressKHR"/>
                 <type name="VkDeviceOrHostAddressConstKHR"/>
-                <type name="VkAccelerationStructureBuildOffsetInfoKHR"/>
-                <type name="VkRayTracingShaderGroupCreateInfoKHR"/>
-                <type name="VkRayTracingShaderGroupTypeKHR"/>
-                <type name="VkRayTracingPipelineCreateInfoKHR"/>
+                <type name="VkAccelerationStructureBuildRangeInfoKHR"/>
                 <type name="VkAabbPositionsKHR"/>
                 <type name="VkAccelerationStructureGeometryTrianglesDataKHR"/>
                 <type name="VkTransformMatrixKHR"/>
@@ -11672,34 +12182,30 @@ typedef void <name>CAMetalLayer</name>;
                 <type name="VkGeometryInstanceFlagsKHR"/>
                 <type name="VkGeometryFlagBitsKHR"/>
                 <type name="VkGeometryInstanceFlagBitsKHR"/>
-                <type name="VkAccelerationStructureCreateGeometryTypeInfoKHR"/>
                 <type name="VkAccelerationStructureCreateInfoKHR"/>
                 <type name="VkAccelerationStructureKHR"/>
                 <type name="VkBuildAccelerationStructureFlagBitsKHR"/>
                 <type name="VkBuildAccelerationStructureFlagsKHR"/>
                 <type name="VkCopyAccelerationStructureModeKHR"/>
                 <type name="VkGeometryTypeKHR"/>
-                <type name="VkBindAccelerationStructureMemoryInfoKHR"/>
                 <type name="VkWriteDescriptorSetAccelerationStructureKHR"/>
-                <type name="VkAccelerationStructureMemoryRequirementsInfoKHR"/>
-                <type name="VkPhysicalDeviceRayTracingFeaturesKHR"/>
-                <type name="VkPhysicalDeviceRayTracingPropertiesKHR"/>
-                <type name="VkAccelerationStructureMemoryRequirementsTypeKHR"/>
+                <type name="VkPhysicalDeviceAccelerationStructureFeaturesKHR"/>
+                <type name="VkPhysicalDeviceAccelerationStructurePropertiesKHR"/>
                 <type name="VkAccelerationStructureDeviceAddressInfoKHR"/>
-                <type name="VkAccelerationStructureVersionKHR"/>
-                <type name="VkStridedBufferRegionKHR"/>
-                <type name="VkTraceRaysIndirectCommandKHR"/>
+                <type name="VkAccelerationStructureVersionInfoKHR"/>
                 <type name="VkCopyAccelerationStructureToMemoryInfoKHR"/>
                 <type name="VkCopyMemoryToAccelerationStructureInfoKHR"/>
                 <type name="VkCopyAccelerationStructureInfoKHR"/>
-                <type name="VkRayTracingPipelineInterfaceCreateInfoKHR"/>
+                <type name="VkAccelerationStructureCompatibilityKHR"/>
+                <type name="VkAccelerationStructureCreateFlagBitsKHR"/>
+                <type name="VkAccelerationStructureCreateFlagsKHR"/>
+                <type name="VkBuildAccelerationStructureModeKHR"/>
+                <type name="VkAccelerationStructureBuildSizesInfoKHR"/>
                 <command name="vkCreateAccelerationStructureKHR"/>
                 <command name="vkDestroyAccelerationStructureKHR"/>
-                <command name="vkGetAccelerationStructureMemoryRequirementsKHR"/>
-                <command name="vkBindAccelerationStructureMemoryKHR"/>
-                <command name="vkCmdBuildAccelerationStructureKHR"/>
-                <command name="vkCmdBuildAccelerationStructureIndirectKHR"/>
-                <command name="vkBuildAccelerationStructureKHR"/>
+                <command name="vkCmdBuildAccelerationStructuresKHR"/>
+                <command name="vkCmdBuildAccelerationStructuresIndirectKHR"/>
+                <command name="vkBuildAccelerationStructuresKHR"/>
                 <command name="vkCopyAccelerationStructureKHR"/>
                 <command name="vkCopyAccelerationStructureToMemoryKHR"/>
                 <command name="vkCopyMemoryToAccelerationStructureKHR"/>
@@ -11707,14 +12213,63 @@ typedef void <name>CAMetalLayer</name>;
                 <command name="vkCmdCopyAccelerationStructureKHR"/>
                 <command name="vkCmdCopyAccelerationStructureToMemoryKHR"/>
                 <command name="vkCmdCopyMemoryToAccelerationStructureKHR"/>
+                <command name="vkGetAccelerationStructureDeviceAddressKHR"/>
+                <command name="vkCmdWriteAccelerationStructuresPropertiesKHR"/>
+                <command name="vkGetDeviceAccelerationStructureCompatibilityKHR"/>
+                <command name="vkGetAccelerationStructureBuildSizesKHR"/>
+            </require>
+        </extension>
+        <extension name="VK_KHR_ray_tracing_pipeline" number="348" type="device" requiresCore="1.1" requires="VK_KHR_spirv_1_4,VK_KHR_acceleration_structure" author="KHR" contact="Daniel Koch @dgkoch" supported="vulkan" sortorder="1">
+            <require>
+                <enum value="1"                                             name="VK_KHR_RAY_TRACING_PIPELINE_SPEC_VERSION"/>
+                <enum value="&quot;VK_KHR_ray_tracing_pipeline&quot;"       name="VK_KHR_RAY_TRACING_PIPELINE_EXTENSION_NAME"/>
+                <enum                                                       name="VK_SHADER_UNUSED_KHR"/>
+                <enum offset="0" extends="VkStructureType"                  name="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_RAY_TRACING_PIPELINE_FEATURES_KHR"/>
+                <enum offset="1" extends="VkStructureType"                  name="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_RAY_TRACING_PIPELINE_PROPERTIES_KHR"/>
+                <enum offset="15" extends="VkStructureType" extnumber="151" name="VK_STRUCTURE_TYPE_RAY_TRACING_PIPELINE_CREATE_INFO_KHR"/>
+                <enum offset="16" extends="VkStructureType" extnumber="151" name="VK_STRUCTURE_TYPE_RAY_TRACING_SHADER_GROUP_CREATE_INFO_KHR"/>
+                <enum offset="18" extends="VkStructureType" extnumber="151" name="VK_STRUCTURE_TYPE_RAY_TRACING_PIPELINE_INTERFACE_CREATE_INFO_KHR"/>
+                <enum bitpos="8"  extends="VkShaderStageFlagBits"           name="VK_SHADER_STAGE_RAYGEN_BIT_KHR"/>
+                <enum bitpos="9"  extends="VkShaderStageFlagBits"           name="VK_SHADER_STAGE_ANY_HIT_BIT_KHR"/>
+                <enum bitpos="10" extends="VkShaderStageFlagBits"           name="VK_SHADER_STAGE_CLOSEST_HIT_BIT_KHR"/>
+                <enum bitpos="11" extends="VkShaderStageFlagBits"           name="VK_SHADER_STAGE_MISS_BIT_KHR"/>
+                <enum bitpos="12" extends="VkShaderStageFlagBits"           name="VK_SHADER_STAGE_INTERSECTION_BIT_KHR"/>
+                <enum bitpos="13" extends="VkShaderStageFlagBits"           name="VK_SHADER_STAGE_CALLABLE_BIT_KHR"/>
+                <enum bitpos="21" extends="VkPipelineStageFlagBits"         name="VK_PIPELINE_STAGE_RAY_TRACING_SHADER_BIT_KHR"/>
+                <enum bitpos="10" extends="VkBufferUsageFlagBits"           name="VK_BUFFER_USAGE_SHADER_BINDING_TABLE_BIT_KHR"/>
+                <enum offset="0"  extends="VkPipelineBindPoint" extnumber="166" name="VK_PIPELINE_BIND_POINT_RAY_TRACING_KHR"/>
+                <enum bitpos="14" extends="VkPipelineCreateFlagBits"        name="VK_PIPELINE_CREATE_RAY_TRACING_NO_NULL_ANY_HIT_SHADERS_BIT_KHR"/>
+                <enum bitpos="15" extends="VkPipelineCreateFlagBits"        name="VK_PIPELINE_CREATE_RAY_TRACING_NO_NULL_CLOSEST_HIT_SHADERS_BIT_KHR"/>
+                <enum bitpos="16" extends="VkPipelineCreateFlagBits"        name="VK_PIPELINE_CREATE_RAY_TRACING_NO_NULL_MISS_SHADERS_BIT_KHR"/>
+                <enum bitpos="17" extends="VkPipelineCreateFlagBits"        name="VK_PIPELINE_CREATE_RAY_TRACING_NO_NULL_INTERSECTION_SHADERS_BIT_KHR"/>
+                <enum bitpos="12" extends="VkPipelineCreateFlagBits"        name="VK_PIPELINE_CREATE_RAY_TRACING_SKIP_TRIANGLES_BIT_KHR"/>
+                <enum bitpos="13" extends="VkPipelineCreateFlagBits"        name="VK_PIPELINE_CREATE_RAY_TRACING_SKIP_AABBS_BIT_KHR"/>
+                <enum bitpos="19" extends="VkPipelineCreateFlagBits"        name="VK_PIPELINE_CREATE_RAY_TRACING_SHADER_GROUP_HANDLE_CAPTURE_REPLAY_BIT_KHR"/>
+                <enum offset="0"  extends="VkDynamicState"                  name="VK_DYNAMIC_STATE_RAY_TRACING_PIPELINE_STACK_SIZE_KHR"/>
+                <type name="VkRayTracingShaderGroupCreateInfoKHR"/>
+                <type name="VkRayTracingShaderGroupTypeKHR"/>
+                <type name="VkRayTracingPipelineCreateInfoKHR"/>
+                <type name="VkPhysicalDeviceRayTracingPipelineFeaturesKHR"/>
+                <type name="VkPhysicalDeviceRayTracingPipelinePropertiesKHR"/>
+                <type name="VkStridedDeviceAddressRegionKHR"/>
+                <type name="VkTraceRaysIndirectCommandKHR"/>
+                <type name="VkRayTracingPipelineInterfaceCreateInfoKHR"/>
+                <type name="VkShaderGroupShaderKHR"/>
                 <command name="vkCmdTraceRaysKHR"/>
                 <command name="vkCreateRayTracingPipelinesKHR"/>
                 <command name="vkGetRayTracingShaderGroupHandlesKHR"/>
-                <command name="vkGetAccelerationStructureDeviceAddressKHR"/>
                 <command name="vkGetRayTracingCaptureReplayShaderGroupHandlesKHR"/>
-                <command name="vkCmdWriteAccelerationStructuresPropertiesKHR"/>
                 <command name="vkCmdTraceRaysIndirectKHR"/>
-                <command name="vkGetDeviceAccelerationStructureCompatibilityKHR"/>
+                <command name="vkGetRayTracingShaderGroupStackSizeKHR"/>
+                <command name="vkCmdSetRayTracingPipelineStackSizeKHR"/>
+            </require>
+        </extension>
+        <extension name="VK_KHR_ray_query" number="349" type="device" requiresCore="1.1" requires="VK_KHR_spirv_1_4,VK_KHR_acceleration_structure" author="KHR" contact="Daniel Koch @dgkoch" supported="vulkan" sortorder="1">
+            <require>
+                <enum value="1"                                             name="VK_KHR_RAY_QUERY_SPEC_VERSION"/>
+                <enum value="&quot;VK_KHR_ray_query&quot;"                  name="VK_KHR_RAY_QUERY_EXTENSION_NAME"/>
+                <enum offset="13" extends="VkStructureType"                 name="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_RAY_QUERY_FEATURES_KHR"/>
+                <type name="VkPhysicalDeviceRayQueryFeaturesKHR"/>
             </require>
         </extension>
         <extension name="VK_NV_extension_152" number="152" author="NV" contact="Jeff Bolz @jeffbolznv" supported="disabled">
@@ -11860,7 +12415,6 @@ typedef void <name>CAMetalLayer</name>;
                 <enum offset="0" dir="-" extends="VkResult" name="VK_ERROR_INVALID_DRM_FORMAT_MODIFIER_PLANE_LAYOUT_EXT"/>
 
                 <enum offset="0" extends="VkStructureType" name="VK_STRUCTURE_TYPE_DRM_FORMAT_MODIFIER_PROPERTIES_LIST_EXT"/>
-                <enum offset="1" extends="VkStructureType" name="VK_STRUCTURE_TYPE_DRM_FORMAT_MODIFIER_PROPERTIES_EXT"/>
                 <enum offset="2" extends="VkStructureType" name="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_IMAGE_DRM_FORMAT_MODIFIER_INFO_EXT"/>
                 <enum offset="3" extends="VkStructureType" name="VK_STRUCTURE_TYPE_IMAGE_DRM_FORMAT_MODIFIER_LIST_CREATE_INFO_EXT"/>
                 <enum offset="4" extends="VkStructureType" name="VK_STRUCTURE_TYPE_IMAGE_DRM_FORMAT_MODIFIER_EXPLICIT_CREATE_INFO_EXT"/>
@@ -11938,10 +12492,14 @@ typedef void <name>CAMetalLayer</name>;
                 <enum value="&quot;VK_EXT_shader_viewport_index_layer&quot;" name="VK_EXT_SHADER_VIEWPORT_INDEX_LAYER_EXTENSION_NAME"/>
             </require>
         </extension>
-        <extension name="VK_NV_extension_164" number="164" author="NV" contact="Daniel Koch @dgkoch" supported="disabled">
+        <extension name="VK_KHR_portability_subset" number="164" type="device" requires="VK_KHR_get_physical_device_properties2" author="KHR" contact="Bill Hollings @billhollings" platform="provisional" supported="vulkan" provisional="true">
             <require>
-                <enum value="0"                                             name="VK_EXT_EXTENSION_164_SPEC_VERSION"/>
-                <enum value="&quot;VK_NV_extension_164&quot;"               name="VK_EXT_EXTENSION_164_EXTENSION_NAME"/>
+                <enum value="1"                                             name="VK_KHR_PORTABILITY_SUBSET_SPEC_VERSION"/>
+                <enum value="&quot;VK_KHR_portability_subset&quot;"         name="VK_KHR_PORTABILITY_SUBSET_EXTENSION_NAME"/>
+                <enum offset="0" extends="VkStructureType"                  name="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_PORTABILITY_SUBSET_FEATURES_KHR"/>
+                <enum offset="1" extends="VkStructureType"                  name="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_PORTABILITY_SUBSET_PROPERTIES_KHR"/>
+                <type name="VkPhysicalDevicePortabilitySubsetFeaturesKHR"/>
+                <type name="VkPhysicalDevicePortabilitySubsetPropertiesKHR"/>
             </require>
         </extension>
         <extension name="VK_NV_shading_rate_image" number="165" type="device" requires="VK_KHR_get_physical_device_properties2" author="NV" contact="Pat Brown @nvpbrown" supported="vulkan">
@@ -11982,8 +12540,8 @@ typedef void <name>CAMetalLayer</name>;
                 <enum offset="3"  extends="VkStructureType"   name="VK_STRUCTURE_TYPE_GEOMETRY_NV"/>
                 <enum offset="4"  extends="VkStructureType"   name="VK_STRUCTURE_TYPE_GEOMETRY_TRIANGLES_NV"/>
                 <enum offset="5"  extends="VkStructureType"   name="VK_STRUCTURE_TYPE_GEOMETRY_AABB_NV"/>
-                <enum extends="VkStructureType"               name="VK_STRUCTURE_TYPE_BIND_ACCELERATION_STRUCTURE_MEMORY_INFO_NV" alias="VK_STRUCTURE_TYPE_BIND_ACCELERATION_STRUCTURE_MEMORY_INFO_KHR"/>
-                <enum extends="VkStructureType"               name="VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET_ACCELERATION_STRUCTURE_NV" alias="VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET_ACCELERATION_STRUCTURE_KHR"/>
+                <enum offset="6"  extends="VkStructureType"   name="VK_STRUCTURE_TYPE_BIND_ACCELERATION_STRUCTURE_MEMORY_INFO_NV"/>
+                <enum offset="7"  extends="VkStructureType"   name="VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET_ACCELERATION_STRUCTURE_NV"/>
                 <enum offset="8"  extends="VkStructureType"   name="VK_STRUCTURE_TYPE_ACCELERATION_STRUCTURE_MEMORY_REQUIREMENTS_INFO_NV"/>
                 <enum offset="9"  extends="VkStructureType"   name="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_RAY_TRACING_PROPERTIES_NV"/>
                 <enum offset="11" extends="VkStructureType"   name="VK_STRUCTURE_TYPE_RAY_TRACING_SHADER_GROUP_CREATE_INFO_NV"/>
@@ -11996,15 +12554,15 @@ typedef void <name>CAMetalLayer</name>;
                 <enum extends="VkShaderStageFlagBits"         name="VK_SHADER_STAGE_CALLABLE_BIT_NV" alias="VK_SHADER_STAGE_CALLABLE_BIT_KHR"/>
                 <enum extends="VkPipelineStageFlagBits"       name="VK_PIPELINE_STAGE_RAY_TRACING_SHADER_BIT_NV" alias="VK_PIPELINE_STAGE_RAY_TRACING_SHADER_BIT_KHR"/>
                 <enum extends="VkPipelineStageFlagBits"       name="VK_PIPELINE_STAGE_ACCELERATION_STRUCTURE_BUILD_BIT_NV" alias="VK_PIPELINE_STAGE_ACCELERATION_STRUCTURE_BUILD_BIT_KHR"/>
-                <enum extends="VkBufferUsageFlagBits"         name="VK_BUFFER_USAGE_RAY_TRACING_BIT_NV" alias="VK_BUFFER_USAGE_RAY_TRACING_BIT_KHR"/>
+                <enum extends="VkBufferUsageFlagBits"         name="VK_BUFFER_USAGE_RAY_TRACING_BIT_NV" alias="VK_BUFFER_USAGE_SHADER_BINDING_TABLE_BIT_KHR"/>
                 <enum extends="VkPipelineBindPoint"           name="VK_PIPELINE_BIND_POINT_RAY_TRACING_NV" alias="VK_PIPELINE_BIND_POINT_RAY_TRACING_KHR"/>
-                <enum extends="VkDescriptorType"              name="VK_DESCRIPTOR_TYPE_ACCELERATION_STRUCTURE_NV" alias="VK_DESCRIPTOR_TYPE_ACCELERATION_STRUCTURE_KHR"/>
+                <enum offset="0" extends="VkDescriptorType"   name="VK_DESCRIPTOR_TYPE_ACCELERATION_STRUCTURE_NV"/>
                 <enum extends="VkAccessFlagBits"              name="VK_ACCESS_ACCELERATION_STRUCTURE_READ_BIT_NV" alias="VK_ACCESS_ACCELERATION_STRUCTURE_READ_BIT_KHR"/>
                 <enum extends="VkAccessFlagBits"              name="VK_ACCESS_ACCELERATION_STRUCTURE_WRITE_BIT_NV" alias="VK_ACCESS_ACCELERATION_STRUCTURE_WRITE_BIT_KHR"/>
-                <enum extends="VkQueryType"                   name="VK_QUERY_TYPE_ACCELERATION_STRUCTURE_COMPACTED_SIZE_NV" alias="VK_QUERY_TYPE_ACCELERATION_STRUCTURE_COMPACTED_SIZE_KHR"/>
+                <enum offset="0" extends="VkQueryType"        name="VK_QUERY_TYPE_ACCELERATION_STRUCTURE_COMPACTED_SIZE_NV"/>
                 <enum bitpos="5" extends="VkPipelineCreateFlagBits"      name="VK_PIPELINE_CREATE_DEFER_COMPILE_BIT_NV"/>
-                <enum extends="VkObjectType"                  name="VK_OBJECT_TYPE_ACCELERATION_STRUCTURE_NV" alias="VK_OBJECT_TYPE_ACCELERATION_STRUCTURE_KHR"/>
-                <enum extends="VkDebugReportObjectTypeEXT"    name="VK_DEBUG_REPORT_OBJECT_TYPE_ACCELERATION_STRUCTURE_NV_EXT" alias="VK_DEBUG_REPORT_OBJECT_TYPE_ACCELERATION_STRUCTURE_KHR_EXT"/>
+                <enum offset="0" extends="VkObjectType"       name="VK_OBJECT_TYPE_ACCELERATION_STRUCTURE_NV"/>
+                <enum offset="0" extends="VkDebugReportObjectTypeEXT" name="VK_DEBUG_REPORT_OBJECT_TYPE_ACCELERATION_STRUCTURE_NV_EXT"/>
                 <enum extends="VkIndexType"                   name="VK_INDEX_TYPE_NONE_NV" alias="VK_INDEX_TYPE_NONE_KHR"/>
                 <type name="VkRayTracingShaderGroupCreateInfoNV"/>
                 <type name="VkRayTracingShaderGroupTypeNV"/>
@@ -12054,9 +12612,6 @@ typedef void <name>CAMetalLayer</name>;
                 <type name="VkTransformMatrixNV"/>
                 <type name="VkAabbPositionsNV"/>
                 <type name="VkAccelerationStructureInstanceNV"/>
-                <enum extends="VkAccelerationStructureMemoryRequirementsTypeKHR" name="VK_ACCELERATION_STRUCTURE_MEMORY_REQUIREMENTS_TYPE_OBJECT_NV" alias="VK_ACCELERATION_STRUCTURE_MEMORY_REQUIREMENTS_TYPE_OBJECT_KHR"/>
-                <enum extends="VkAccelerationStructureMemoryRequirementsTypeKHR" name="VK_ACCELERATION_STRUCTURE_MEMORY_REQUIREMENTS_TYPE_BUILD_SCRATCH_NV" alias="VK_ACCELERATION_STRUCTURE_MEMORY_REQUIREMENTS_TYPE_BUILD_SCRATCH_KHR"/>
-                <enum extends="VkAccelerationStructureMemoryRequirementsTypeKHR" name="VK_ACCELERATION_STRUCTURE_MEMORY_REQUIREMENTS_TYPE_UPDATE_SCRATCH_NV" alias="VK_ACCELERATION_STRUCTURE_MEMORY_REQUIREMENTS_TYPE_UPDATE_SCRATCH_KHR"/>
                 <command name="vkCreateAccelerationStructureNV"/>
                 <command name="vkDestroyAccelerationStructureNV"/>
                 <command name="vkGetAccelerationStructureMemoryRequirementsNV"/>
@@ -12085,7 +12640,6 @@ typedef void <name>CAMetalLayer</name>;
             <require>
                 <enum value="0"                                             name="VK_EXT_EXTENSION_168_SPEC_VERSION"/>
                 <enum value="&quot;VK_NV_extension_168&quot;"               name="VK_EXT_EXTENSION_168_EXTENSION_NAME"/>
-                <enum bitpos="19" extends="VkPipelineCreateFlagBits"        name="VK_PIPELINE_CREATE_RESERVED_19_BIT_KHR"/>
             </require>
         </extension>
         <extension name="VK_KHR_maintenance3" number="169" type="device" requires="VK_KHR_get_physical_device_properties2" author="KHR" contact="Jeff Bolz @jeffbolznv" supported="vulkan" promotedto="VK_VERSION_1_1">
@@ -12107,7 +12661,7 @@ typedef void <name>CAMetalLayer</name>;
                 <command name="vkCmdDrawIndexedIndirectCountKHR"/>
             </require>
         </extension>
-        <extension name="VK_EXT_filter_cubic" number="171" type="device" requires="VK_IMG_filter_cubic" author="QCOM" contact="Bill Licea-Kane @wwlk" supported="vulkan">
+        <extension name="VK_EXT_filter_cubic" number="171" type="device" author="QCOM" contact="Bill Licea-Kane @wwlk" supported="vulkan">
             <require>
                 <enum value="3"                                             name="VK_EXT_FILTER_CUBIC_SPEC_VERSION"/>
                 <enum value="&quot;VK_EXT_filter_cubic&quot;"               name="VK_EXT_FILTER_CUBIC_EXTENSION_NAME"/>
@@ -12322,6 +12876,8 @@ typedef void <name>CAMetalLayer</name>;
             <require>
                 <enum value="0"                                         name="VK_GOOGLE_EXTENSION_196_SPEC_VERSION"/>
                 <enum value="&quot;VK_GOOGLE_extension_196&quot;"       name="VK_GOOGLE_EXTENSION_196_EXTENSION_NAME"/>
+                <enum bitpos="1"  extends="VkPipelineCacheCreateFlagBits"
+                    name="VK_PIPELINE_CACHE_CREATE_RESERVED_1_BIT_EXT"/>
             </require>
         </extension>
         <extension name="VK_KHR_driver_properties" number="197" type="device" requires="VK_KHR_get_physical_device_properties2" author="KHR" contact="Daniel Rakos @drakos-amd" supported="vulkan" promotedto="VK_VERSION_1_2">
@@ -12575,10 +13131,12 @@ typedef void <name>CAMetalLayer</name>;
                 <command name="vkCreateImagePipeSurfaceFUCHSIA"/>
             </require>
         </extension>
-        <extension name="VK_GOOGLE_extension_216" number="216" author="GOOGLE" contact="Jesse Hall @critsec" supported="disabled">
+        <extension name="VK_KHR_shader_terminate_invocation" number="216" type="device" author="KHR" requires="VK_KHR_get_physical_device_properties2" contact="Jesse Hall @critsec" supported="vulkan">
             <require>
-                <enum value="0"                                             name="VK_KHR_EXTENSION_216_SPEC_VERSION"/>
-                <enum value="&quot;VK_KHR_extension_216&quot;"              name="VK_KHR_EXTENSION_216_EXTENSION_NAME"/>
+                <enum value="1"                                                 name="VK_KHR_SHADER_TERMINATE_INVOCATION_SPEC_VERSION"/>
+                <enum value="&quot;VK_KHR_shader_terminate_invocation&quot;"    name="VK_KHR_SHADER_TERMINATE_INVOCATION_EXTENSION_NAME"/>
+                <enum offset="0" extends="VkStructureType"                      name="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SHADER_TERMINATE_INVOCATION_FEATURES_KHR"/>
+                <type name="VkPhysicalDeviceShaderTerminateInvocationFeaturesKHR"/>
             </require>
         </extension>
         <extension name="VK_GOOGLE_extension_217" number="217" author="GOOGLE" contact="Jesse Hall @critsec" supported="disabled">
@@ -12672,11 +13230,29 @@ typedef void <name>CAMetalLayer</name>;
                 <enum bitpos="1" extends="VkPipelineShaderStageCreateFlagBits" name="VK_PIPELINE_SHADER_STAGE_CREATE_REQUIRE_FULL_SUBGROUPS_BIT_EXT"/>
             </require>
         </extension>
-        <extension name="VK_AMD_extension_227" number="227" author="AMD" contact="Martin Dinkov @mdinkov" supported="disabled">
+        <extension name="VK_KHR_fragment_shading_rate" number="227" type="device" requires="VK_KHR_create_renderpass2,VK_KHR_get_physical_device_properties2" author="KHR" contact="Tobias Hector @tobski" supported="vulkan">
             <require>
-                <enum value="0"                                             name="VK_AMD_EXTENSION_227_SPEC_VERSION"/>
-                <enum value="&quot;VK_AMD_extension_227&quot;"              name="VK_AMD_EXTENSION_227_EXTENSION_NAME"/>
-                <enum bitpos="30" extends="VkFormatFeatureFlagBits"         name="VK_FORMAT_FEATURE_AMD_RESERVED_30_BIT"/>
+                <enum value="1"                                                 name="VK_KHR_FRAGMENT_SHADING_RATE_SPEC_VERSION"/>
+                <enum value="&quot;VK_KHR_fragment_shading_rate&quot;" name="VK_KHR_FRAGMENT_SHADING_RATE_EXTENSION_NAME"/>
+                <type name="VkFragmentShadingRateCombinerOpKHR"/>
+                <type name="VkFragmentShadingRateAttachmentInfoKHR"/>
+                <type name="VkPipelineFragmentShadingRateStateCreateInfoKHR"/>
+                <type name="VkPhysicalDeviceFragmentShadingRateFeaturesKHR"/>
+                <type name="VkPhysicalDeviceFragmentShadingRatePropertiesKHR"/>
+                <type name="VkPhysicalDeviceFragmentShadingRateKHR"/>
+                <command name="vkGetPhysicalDeviceFragmentShadingRatesKHR"/>
+                <command name="vkCmdSetFragmentShadingRateKHR"/>
+                <enum extends="VkImageLayout"           name="VK_IMAGE_LAYOUT_FRAGMENT_SHADING_RATE_ATTACHMENT_OPTIMAL_KHR" alias="VK_IMAGE_LAYOUT_SHADING_RATE_OPTIMAL_NV"/>
+                <enum offset="0" extends="VkDynamicState"                       name="VK_DYNAMIC_STATE_FRAGMENT_SHADING_RATE_KHR"/>
+                <enum offset="0" extends="VkStructureType"                      name="VK_STRUCTURE_TYPE_FRAGMENT_SHADING_RATE_ATTACHMENT_INFO_KHR"/>
+                <enum offset="1" extends="VkStructureType"                      name="VK_STRUCTURE_TYPE_PIPELINE_FRAGMENT_SHADING_RATE_STATE_CREATE_INFO_KHR"/>
+                <enum offset="2" extends="VkStructureType"                      name="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FRAGMENT_SHADING_RATE_PROPERTIES_KHR"/>
+                <enum offset="3" extends="VkStructureType"                      name="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FRAGMENT_SHADING_RATE_FEATURES_KHR"/>
+                <enum offset="4" extends="VkStructureType"                      name="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FRAGMENT_SHADING_RATE_KHR"/>
+                <enum extends="VkAccessFlagBits"        name="VK_ACCESS_FRAGMENT_SHADING_RATE_ATTACHMENT_READ_BIT_KHR"  alias="VK_ACCESS_SHADING_RATE_IMAGE_READ_BIT_NV"/>
+                <enum extends="VkImageUsageFlagBits"    name="VK_IMAGE_USAGE_FRAGMENT_SHADING_RATE_ATTACHMENT_BIT_KHR"  alias="VK_IMAGE_USAGE_SHADING_RATE_IMAGE_BIT_NV"/>
+                <enum extends="VkPipelineStageFlagBits" name="VK_PIPELINE_STAGE_FRAGMENT_SHADING_RATE_ATTACHMENT_BIT_KHR"   alias="VK_PIPELINE_STAGE_SHADING_RATE_IMAGE_BIT_NV"/>
+                <enum bitpos="30" extends="VkFormatFeatureFlagBits"              name="VK_FORMAT_FEATURE_FRAGMENT_SHADING_RATE_ATTACHMENT_BIT_KHR"/>
             </require>
         </extension>
         <extension name="VK_AMD_shader_core_properties2" number="228" type="device" author="AMD" contact="Matthaeus G. Chajdas @anteru" supported="vulkan" requires="VK_AMD_shader_core_properties">
@@ -12729,10 +13305,12 @@ typedef void <name>CAMetalLayer</name>;
                 <enum value="&quot;VK_AMD_extension_234&quot;"              name="VK_AMD_EXTENSION_234_EXTENSION_NAME"/>
             </require>
         </extension>
-        <extension name="VK_AMD_extension_235" number="235" author="AMD" contact="Martin Dinkov @mdinkov" supported="disabled">
+        <extension name="VK_EXT_shader_image_atomic_int64" number="235" type="device" requires="VK_KHR_get_physical_device_properties2" author="EXT" contact="Tobias Hector @tobski" supported="vulkan">
             <require>
-                <enum value="0"                                             name="VK_AMD_EXTENSION_235_SPEC_VERSION"/>
-                <enum value="&quot;VK_AMD_extension_235&quot;"              name="VK_AMD_EXTENSION_235_EXTENSION_NAME"/>
+                <enum value="1"                                             name="VK_EXT_SHADER_IMAGE_ATOMIC_INT64_SPEC_VERSION"/>
+                <enum value="&quot;VK_EXT_shader_image_atomic_int64&quot;"  name="VK_EXT_SHADER_IMAGE_ATOMIC_INT64_EXTENSION_NAME"/>
+                <enum offset="0" extends="VkStructureType"                  name="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SHADER_IMAGE_ATOMIC_INT64_FEATURES_EXT"/>
+                <type name="VkPhysicalDeviceShaderImageAtomicInt64FeaturesEXT"/>
             </require>
         </extension>
         <extension name="VK_AMD_extension_236" number="236" author="AMD" contact="Martin Dinkov @mdinkov" supported="disabled">
@@ -12858,7 +13436,7 @@ typedef void <name>CAMetalLayer</name>;
         </extension>
         <extension name="VK_EXT_validation_features" number="248" type="instance" author="LUNARG" contact="Karl Schultz @karl-lunarg" specialuse="debugging" supported="vulkan">
             <require>
-                <enum value="3"                                             name="VK_EXT_VALIDATION_FEATURES_SPEC_VERSION"/>
+                <enum value="4"                                             name="VK_EXT_VALIDATION_FEATURES_SPEC_VERSION"/>
                 <enum value="&quot;VK_EXT_validation_features&quot;"        name="VK_EXT_VALIDATION_FEATURES_EXTENSION_NAME"/>
                 <enum offset="0" extends="VkStructureType"                  name="VK_STRUCTURE_TYPE_VALIDATION_FEATURES_EXT"/>
                 <type name="VkValidationFeaturesEXT"/>
@@ -13012,10 +13590,12 @@ typedef void <name>CAMetalLayer</name>;
                 <command name="vkCmdSetLineStippleEXT"/>
             </require>
         </extension>
-        <extension name="VK_NV_extension_261" number="261" author="NV" contact="Kedarnath Thangudu @kthangudu" supported="disabled">
+        <extension name="VK_EXT_shader_atomic_float" number="261" type="device" author="NV" requires="VK_KHR_get_physical_device_properties2" contact="Vikram Kushwaha @vkushwaha-nv" supported="vulkan">
             <require>
-                <enum value="0"                                             name="VK_NV_EXTENSION_261_SPEC_VERSION"/>
-                <enum value="&quot;VK_NV_extension_261&quot;"               name="VK_NV_EXTENSION_261_EXTENSION_NAME"/>
+                <enum value="1"                                             name="VK_EXT_SHADER_ATOMIC_FLOAT_SPEC_VERSION"/>
+                <enum value="&quot;VK_EXT_shader_atomic_float&quot;"        name="VK_EXT_SHADER_ATOMIC_FLOAT_EXTENSION_NAME"/>
+                <enum offset="0" extends="VkStructureType"                  name="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_SHADER_ATOMIC_FLOAT_FEATURES_EXT"/>
+                <type name="VkPhysicalDeviceShaderAtomicFloatFeaturesEXT"/>
             </require>
         </extension>
         <extension name="VK_EXT_host_query_reset" number="262" author="EXT" contact="Bas Nieuwenhuizen @BNieuwenhuizen" supported="vulkan" type="device" requires="VK_KHR_get_physical_device_properties2" promotedto="VK_VERSION_1_2">
@@ -13060,20 +13640,44 @@ typedef void <name>CAMetalLayer</name>;
                 <enum value="&quot;VK_EXT_extension_267&quot;"              name="VK_EXT_extension_267"/>
             </require>
         </extension>
-        <extension name="VK_KHR_extension_268" number="268" type="device" author="KHR" contact="Piers Daniell @pdaniell-nv" supported="disabled">
+        <extension name="VK_EXT_extended_dynamic_state" number="268" type="device" requires="VK_KHR_get_physical_device_properties2" author="EXT" contact="Piers Daniell @pdaniell-nv" supported="vulkan">
             <require>
-                <enum value="0"                                             name="VK_EXT_EXTENSION_268_SPEC_VERSION"/>
-                <enum value="&quot;VK_KHR_extension_268&quot;"              name="VK_EXT_extension_268"/>
-            </require>
-        </extension>
-        <extension name="VK_KHR_deferred_host_operations" number="269" type="device" author="KHR" contact="Josh Barczak @jbarczak" platform="provisional" supported="vulkan" provisional="true">
+                <enum value="1"                                             name="VK_EXT_EXTENDED_DYNAMIC_STATE_SPEC_VERSION"/>
+                <enum value="&quot;VK_EXT_extended_dynamic_state&quot;"     name="VK_EXT_EXTENDED_DYNAMIC_STATE_EXTENSION_NAME"/>
+                <enum offset="0" extends="VkStructureType"                  name="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_EXTENDED_DYNAMIC_STATE_FEATURES_EXT"/>
+                <enum offset="0" extends="VkDynamicState"                   name="VK_DYNAMIC_STATE_CULL_MODE_EXT"/>
+                <enum offset="1" extends="VkDynamicState"                   name="VK_DYNAMIC_STATE_FRONT_FACE_EXT"/>
+                <enum offset="2" extends="VkDynamicState"                   name="VK_DYNAMIC_STATE_PRIMITIVE_TOPOLOGY_EXT"/>
+                <enum offset="3" extends="VkDynamicState"                   name="VK_DYNAMIC_STATE_VIEWPORT_WITH_COUNT_EXT"/>
+                <enum offset="4" extends="VkDynamicState"                   name="VK_DYNAMIC_STATE_SCISSOR_WITH_COUNT_EXT"/>
+                <enum offset="5" extends="VkDynamicState"                   name="VK_DYNAMIC_STATE_VERTEX_INPUT_BINDING_STRIDE_EXT"/>
+                <enum offset="6" extends="VkDynamicState"                   name="VK_DYNAMIC_STATE_DEPTH_TEST_ENABLE_EXT"/>
+                <enum offset="7" extends="VkDynamicState"                   name="VK_DYNAMIC_STATE_DEPTH_WRITE_ENABLE_EXT"/>
+                <enum offset="8" extends="VkDynamicState"                   name="VK_DYNAMIC_STATE_DEPTH_COMPARE_OP_EXT"/>
+                <enum offset="9" extends="VkDynamicState"                   name="VK_DYNAMIC_STATE_DEPTH_BOUNDS_TEST_ENABLE_EXT"/>
+                <enum offset="10" extends="VkDynamicState"                  name="VK_DYNAMIC_STATE_STENCIL_TEST_ENABLE_EXT"/>
+                <enum offset="11" extends="VkDynamicState"                  name="VK_DYNAMIC_STATE_STENCIL_OP_EXT"/>
+                <type name="VkPhysicalDeviceExtendedDynamicStateFeaturesEXT"/>
+                <command name="vkCmdSetCullModeEXT"/>
+                <command name="vkCmdSetFrontFaceEXT"/>
+                <command name="vkCmdSetPrimitiveTopologyEXT"/>
+                <command name="vkCmdSetViewportWithCountEXT"/>
+                <command name="vkCmdSetScissorWithCountEXT"/>
+                <command name="vkCmdBindVertexBuffers2EXT"/>
+                <command name="vkCmdSetDepthTestEnableEXT"/>
+                <command name="vkCmdSetDepthWriteEnableEXT"/>
+                <command name="vkCmdSetDepthCompareOpEXT"/>
+                <command name="vkCmdSetDepthBoundsTestEnableEXT"/>
+                <command name="vkCmdSetStencilTestEnableEXT"/>
+                <command name="vkCmdSetStencilOpEXT"/>
+             </require>
+         </extension>
+        <extension name="VK_KHR_deferred_host_operations" number="269" type="device" author="KHR" contact="Josh Barczak @jbarczak" supported="vulkan">
             <require>
-                <enum value="3"                                             name="VK_KHR_DEFERRED_HOST_OPERATIONS_SPEC_VERSION"/>
+                <enum value="4"                                             name="VK_KHR_DEFERRED_HOST_OPERATIONS_SPEC_VERSION"/>
                 <enum value="&quot;VK_KHR_deferred_host_operations&quot;"   name="VK_KHR_DEFERRED_HOST_OPERATIONS_EXTENSION_NAME"/>
-                <enum offset="0" extends="VkStructureType"                  name="VK_STRUCTURE_TYPE_DEFERRED_OPERATION_INFO_KHR"/>
                 <enum offset="0" extends="VkObjectType"                     name="VK_OBJECT_TYPE_DEFERRED_OPERATION_KHR"/>
                 <type name="VkDeferredOperationKHR"/>
-                <type name="VkDeferredOperationInfoKHR"/>
                 <command name="vkCreateDeferredOperationKHR"/>
                 <command name="vkDestroyDeferredOperationKHR"/>
                 <command name="vkGetDeferredOperationMaxConcurrencyKHR"/>
@@ -13233,7 +13837,6 @@ typedef void <name>CAMetalLayer</name>;
                 <enum offset="0" extends="VkStructureType"                  name="VK_STRUCTURE_TYPE_COMMAND_BUFFER_INHERITANCE_RENDER_PASS_TRANSFORM_INFO_QCOM"/>
                 <enum offset="1" extends="VkStructureType"                  name="VK_STRUCTURE_TYPE_RENDER_PASS_TRANSFORM_BEGIN_INFO_QCOM"/>
                 <enum bitpos="1" extends="VkRenderPassCreateFlagBits"       name="VK_RENDER_PASS_CREATE_TRANSFORM_BIT_QCOM"/>
-                <type name="VkRenderPassCreateFlags"/>
                 <type name="VkRenderPassTransformBeginInfoQCOM"/>
                 <type name="VkCommandBufferInheritanceRenderPassTransformInfoQCOM"/>
             </require>
@@ -13244,10 +13847,19 @@ typedef void <name>CAMetalLayer</name>;
                 <enum value="&quot;VK_EXT_extension_284&quot;"              name="VK_EXT_extension_284"/>
             </require>
         </extension>
-        <extension name="VK_EXT_extension_285" number="285" type="device" author="EXT" contact="Yiwei Zhang @zzyiwei" supported="disabled">
+        <extension name="VK_EXT_device_memory_report" number="285" type="device" requires="VK_KHR_get_physical_device_properties2" author="EXT" contact="Yiwei Zhang @zhangyiwei" specialuse="devtools" supported="vulkan">
             <require>
-                <enum value="0"                                             name="VK_EXT_EXTENSION_285_SPEC_VERSION"/>
-                <enum value="&quot;VK_EXT_extension_285&quot;"              name="VK_EXT_extension_285"/>
+                <enum value="1"                                             name="VK_EXT_DEVICE_MEMORY_REPORT_SPEC_VERSION"/>
+                <enum value="&quot;VK_EXT_device_memory_report&quot;"       name="VK_EXT_DEVICE_MEMORY_REPORT_EXTENSION_NAME"/>
+                <enum offset="0" extends="VkStructureType"                  name="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_DEVICE_MEMORY_REPORT_FEATURES_EXT"/>
+                <enum offset="1" extends="VkStructureType"                  name="VK_STRUCTURE_TYPE_DEVICE_DEVICE_MEMORY_REPORT_CREATE_INFO_EXT"/>
+                <enum offset="2" extends="VkStructureType"                  name="VK_STRUCTURE_TYPE_DEVICE_MEMORY_REPORT_CALLBACK_DATA_EXT"/>
+                <type name="VkPhysicalDeviceDeviceMemoryReportFeaturesEXT"/>
+                <type name="VkDeviceDeviceMemoryReportCreateInfoEXT"/>
+                <type name="VkDeviceMemoryReportCallbackDataEXT"/>
+                <type name="VkDeviceMemoryReportFlagsEXT"/>
+                <type name="VkDeviceMemoryReportEventTypeEXT"/>
+                <type name="PFN_vkDeviceMemoryReportCallbackEXT"/>
             </require>
         </extension>
         <extension name="VK_EXT_extension_286" number="286" type="instance" author="EXT" contact="Drew DeVault sir@cmpwn.com" supported="disabled">
@@ -13282,8 +13894,43 @@ typedef void <name>CAMetalLayer</name>;
         </extension>
         <extension name="VK_EXT_extension_289" number="289" author="EXT" contact="Jan-Harald Fredriksen @janharaldfredriksen-arm" supported="disabled">
             <require>
+                <comment>
+                    These enums are present only to inform downstream
+                    consumers like KTX2. There is no actual Vulkan extension
+                    corresponding to the enums.
+                </comment>
                 <enum value="0"                                             name="VK_EXT_EXTENSION_289_SPEC_VERSION"/>
                 <enum value="&quot;VK_EXT_extension_289&quot;"              name="VK_EXT_EXTENSION_289_EXTENSION_NAME"/>
+                <enum extends="VkFormat" extnumber="289" offset="0" name="VK_FORMAT_ASTC_3x3x3_UNORM_BLOCK_EXT"/>
+                <enum extends="VkFormat" extnumber="289" offset="1" name="VK_FORMAT_ASTC_3x3x3_SRGB_BLOCK_EXT"/>
+                <enum extends="VkFormat" extnumber="289" offset="2" name="VK_FORMAT_ASTC_3x3x3_SFLOAT_BLOCK_EXT"/>
+                <enum extends="VkFormat" extnumber="289" offset="3" name="VK_FORMAT_ASTC_4x3x3_UNORM_BLOCK_EXT"/>
+                <enum extends="VkFormat" extnumber="289" offset="4" name="VK_FORMAT_ASTC_4x3x3_SRGB_BLOCK_EXT"/>
+                <enum extends="VkFormat" extnumber="289" offset="5" name="VK_FORMAT_ASTC_4x3x3_SFLOAT_BLOCK_EXT"/>
+                <enum extends="VkFormat" extnumber="289" offset="6" name="VK_FORMAT_ASTC_4x4x3_UNORM_BLOCK_EXT"/>
+                <enum extends="VkFormat" extnumber="289" offset="7" name="VK_FORMAT_ASTC_4x4x3_SRGB_BLOCK_EXT"/>
+                <enum extends="VkFormat" extnumber="289" offset="8" name="VK_FORMAT_ASTC_4x4x3_SFLOAT_BLOCK_EXT"/>
+                <enum extends="VkFormat" extnumber="289" offset="9" name="VK_FORMAT_ASTC_4x4x4_UNORM_BLOCK_EXT"/>
+                <enum extends="VkFormat" extnumber="289" offset="10" name="VK_FORMAT_ASTC_4x4x4_SRGB_BLOCK_EXT"/>
+                <enum extends="VkFormat" extnumber="289" offset="11" name="VK_FORMAT_ASTC_4x4x4_SFLOAT_BLOCK_EXT"/>
+                <enum extends="VkFormat" extnumber="289" offset="12" name="VK_FORMAT_ASTC_5x4x4_UNORM_BLOCK_EXT"/>
+                <enum extends="VkFormat" extnumber="289" offset="13" name="VK_FORMAT_ASTC_5x4x4_SRGB_BLOCK_EXT"/>
+                <enum extends="VkFormat" extnumber="289" offset="14" name="VK_FORMAT_ASTC_5x4x4_SFLOAT_BLOCK_EXT"/>
+                <enum extends="VkFormat" extnumber="289" offset="15" name="VK_FORMAT_ASTC_5x5x4_UNORM_BLOCK_EXT"/>
+                <enum extends="VkFormat" extnumber="289" offset="16" name="VK_FORMAT_ASTC_5x5x4_SRGB_BLOCK_EXT"/>
+                <enum extends="VkFormat" extnumber="289" offset="17" name="VK_FORMAT_ASTC_5x5x4_SFLOAT_BLOCK_EXT"/>
+                <enum extends="VkFormat" extnumber="289" offset="18" name="VK_FORMAT_ASTC_5x5x5_UNORM_BLOCK_EXT"/>
+                <enum extends="VkFormat" extnumber="289" offset="19" name="VK_FORMAT_ASTC_5x5x5_SRGB_BLOCK_EXT"/>
+                <enum extends="VkFormat" extnumber="289" offset="20" name="VK_FORMAT_ASTC_5x5x5_SFLOAT_BLOCK_EXT"/>
+                <enum extends="VkFormat" extnumber="289" offset="21" name="VK_FORMAT_ASTC_6x5x5_UNORM_BLOCK_EXT"/>
+                <enum extends="VkFormat" extnumber="289" offset="22" name="VK_FORMAT_ASTC_6x5x5_SRGB_BLOCK_EXT"/>
+                <enum extends="VkFormat" extnumber="289" offset="23" name="VK_FORMAT_ASTC_6x5x5_SFLOAT_BLOCK_EXT"/>
+                <enum extends="VkFormat" extnumber="289" offset="24" name="VK_FORMAT_ASTC_6x6x5_UNORM_BLOCK_EXT"/>
+                <enum extends="VkFormat" extnumber="289" offset="25" name="VK_FORMAT_ASTC_6x6x5_SRGB_BLOCK_EXT"/>
+                <enum extends="VkFormat" extnumber="289" offset="26" name="VK_FORMAT_ASTC_6x6x5_SFLOAT_BLOCK_EXT"/>
+                <enum extends="VkFormat" extnumber="289" offset="27" name="VK_FORMAT_ASTC_6x6x6_UNORM_BLOCK_EXT"/>
+                <enum extends="VkFormat" extnumber="289" offset="28" name="VK_FORMAT_ASTC_6x6x6_SRGB_BLOCK_EXT"/>
+                <enum extends="VkFormat" extnumber="289" offset="29" name="VK_FORMAT_ASTC_6x6x6_SFLOAT_BLOCK_EXT"/>
             </require>
         </extension>
         <extension name="VK_GOOGLE_user_type" number="290" type="device" author="GOOGLE" contact="Kaye Mason @chaleur" supported="vulkan">
@@ -13292,7 +13939,7 @@ typedef void <name>CAMetalLayer</name>;
                 <enum value="&quot;VK_GOOGLE_user_type&quot;"               name="VK_GOOGLE_USER_TYPE_EXTENSION_NAME"/>
             </require>
         </extension>
-        <extension name="VK_KHR_pipeline_library" number="291" type="device" author="KHR" contact="Christoph Kubisch @pixeljetstream" platform="provisional" supported="vulkan" provisional="true">
+        <extension name="VK_KHR_pipeline_library" number="291" type="device" author="KHR" contact="Christoph Kubisch @pixeljetstream" supported="vulkan">
             <require>
                 <enum value="1"                                             name="VK_KHR_PIPELINE_LIBRARY_SPEC_VERSION"/>
                 <enum value="&quot;VK_KHR_pipeline_library&quot;"           name="VK_KHR_PIPELINE_LIBRARY_EXTENSION_NAME"/>
@@ -13385,7 +14032,7 @@ typedef void <name>CAMetalLayer</name>;
         <extension name="VK_NV_device_diagnostics_config" number="301" type="device" requires="VK_KHR_get_physical_device_properties2" author="NV" contact="Kedarnath Thangudu @kthangudu" supported="vulkan">
             <require>
                 <enum value="1"                                             name="VK_NV_DEVICE_DIAGNOSTICS_CONFIG_SPEC_VERSION"/>
-                <enum value="&quot;VK_NV_device_diagnostics_config&quot;"     name="VK_NV_DEVICE_DIAGNOSTICS_CONFIG_EXTENSION_NAME"/>
+                <enum value="&quot;VK_NV_device_diagnostics_config&quot;"   name="VK_NV_DEVICE_DIAGNOSTICS_CONFIG_EXTENSION_NAME"/>
                 <enum offset="0" extends="VkStructureType" name="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_DIAGNOSTICS_CONFIG_FEATURES_NV"/>
                 <enum offset="1" extends="VkStructureType" name="VK_STRUCTURE_TYPE_DEVICE_DIAGNOSTICS_CONFIG_CREATE_INFO_NV"/>
                 <type name="VkPhysicalDeviceDiagnosticsConfigFeaturesNV"/>
@@ -13547,19 +14194,28 @@ typedef void <name>CAMetalLayer</name>;
                 <enum value="&quot;VK_KHR_extension_326&quot;"              name="VK_KHR_EXTENSION_326_EXTENSION_NAME"/>
             </require>
         </extension>
-        <extension name="VK_NV_extension_327" number="327" author="NV" contact="Pat Brown @pbrown" supported="disabled">
+        <extension name="VK_NV_fragment_shading_rate_enums" number="327" type="device" requires="VK_KHR_fragment_shading_rate" author="NV" contact="Pat Brown @nvpbrown" supported="vulkan">
             <require>
-                <enum value="0"                                             name="VK_NV_EXTENSION_327_SPEC_VERSION"/>
-                <enum value="&quot;VK_NV_extension_327&quot;"               name="VK_NV_EXTENSION_327_EXTENSION_NAME"/>
+                <enum value="1"                                                 name="VK_NV_FRAGMENT_SHADING_RATE_ENUMS_SPEC_VERSION"/>
+                <enum value="&quot;VK_NV_fragment_shading_rate_enums&quot;" name="VK_NV_FRAGMENT_SHADING_RATE_ENUMS_EXTENSION_NAME"/>
+                <enum offset="0" extends="VkStructureType"                 name="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FRAGMENT_SHADING_RATE_ENUMS_PROPERTIES_NV"/>
+                <enum offset="1" extends="VkStructureType"                 name="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FRAGMENT_SHADING_RATE_ENUMS_FEATURES_NV"/>
+                <enum offset="2" extends="VkStructureType"                 name="VK_STRUCTURE_TYPE_PIPELINE_FRAGMENT_SHADING_RATE_ENUM_STATE_CREATE_INFO_NV"/>
+                <type name="VkPhysicalDeviceFragmentShadingRateEnumsFeaturesNV"/>
+                <type name="VkPhysicalDeviceFragmentShadingRateEnumsPropertiesNV"/>
+                <type name="VkPipelineFragmentShadingRateEnumStateCreateInfoNV"/>
+                <type name="VkFragmentShadingRateNV"/>
+                <type name="VkFragmentShadingRateTypeNV"/>
+                <command name="vkCmdSetFragmentShadingRateEnumNV"/>
             </require>
         </extension>
-        <extension name="VK_NV_extension_328" number="328" author="NV" contact="Pat Brown @pbrown" supported="disabled">
+        <extension name="VK_NV_extension_328" number="328" author="NV" contact="Pat Brown @nvpbrown" supported="disabled">
             <require>
                 <enum value="0"                                             name="VK_NV_EXTENSION_328_SPEC_VERSION"/>
                 <enum value="&quot;VK_NV_extension_328&quot;"               name="VK_NV_EXTENSION_328_EXTENSION_NAME"/>
             </require>
         </extension>
-        <extension name="VK_NV_extension_329" number="329" author="NV" contact="Pat Brown @pbrown" supported="disabled">
+        <extension name="VK_NV_extension_329" number="329" author="NV" contact="Pat Brown @nvpbrown" supported="disabled">
             <require>
                 <enum value="0"                                             name="VK_NV_EXTENSION_329_SPEC_VERSION"/>
                 <enum value="&quot;VK_NV_extension_329&quot;"               name="VK_NV_EXTENSION_329_EXTENSION_NAME"/>
@@ -13583,17 +14239,23 @@ typedef void <name>CAMetalLayer</name>;
                 <enum value="&quot;VK_NV_extension_332&quot;"               name="VK_NV_EXTENSION_332_EXTENSION_NAME"/>
             </require>
         </extension>
-        <extension name="VK_EXT_extension_333" number="333" author="EXT" contact="Matthew Netsch @mnetsch" supported="disabled">
+        <extension name="VK_EXT_fragment_density_map2" number="333" type="device" requires="VK_EXT_fragment_density_map" author="EXT" contact="Matthew Netsch @mnetsch" supported="vulkan">
             <require>
-                <enum value="0"                                             name="VK_EXT_EXTENSION_333_SPEC_VERSION"/>
-                <enum value="&quot;VK_EXT_extension_333&quot;"              name="VK_EXT_EXTENSION_333_EXTENSION_NAME"/>
-                <enum bitpos="1"  extends="VkImageViewCreateFlagBits"       name="VK_IMAGE_VIEW_CREATE_RESERVED_1_BIT_EXT"/>
+                <enum value="1"                                             name="VK_EXT_FRAGMENT_DENSITY_MAP_2_SPEC_VERSION"/>
+                <enum value="&quot;VK_EXT_fragment_density_map2&quot;"      name="VK_EXT_FRAGMENT_DENSITY_MAP_2_EXTENSION_NAME"/>
+                <enum offset="0"  extends="VkStructureType"                 name="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FRAGMENT_DENSITY_MAP_2_FEATURES_EXT"/>
+                <enum offset="1"  extends="VkStructureType"                 name="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FRAGMENT_DENSITY_MAP_2_PROPERTIES_EXT"/>
+                <enum bitpos="1"  extends="VkImageViewCreateFlagBits"       name="VK_IMAGE_VIEW_CREATE_FRAGMENT_DENSITY_MAP_DEFERRED_BIT_EXT"/>
+                <type name="VkPhysicalDeviceFragmentDensityMap2FeaturesEXT"/>
+                <type name="VkPhysicalDeviceFragmentDensityMap2PropertiesEXT"/>
             </require>
         </extension>
-        <extension name="VK_EXT_extension_334" number="334" author="EXT" contact="Jeff Leger @jackohound" supported="disabled">
+        <extension name="VK_QCOM_rotated_copy_commands" number="334" type="device" requires="VK_KHR_swapchain,VK_KHR_copy_commands2" author="QCOM" contact="Jeff Leger @jackohound" supported="vulkan">
             <require>
-                <enum value="0"                                             name="VK_EXT_EXTENSION_334_SPEC_VERSION"/>
-                <enum value="&quot;VK_EXT_extension_334&quot;"              name="VK_EXT_EXTENSION_334_EXTENSION_NAME"/>
+                <enum value="0"                                             name="VK_QCOM_rotated_copy_commands_SPEC_VERSION"/>
+                <enum value="&quot;VK_QCOM_rotated_copy_commands&quot;"     name="VK_QCOM_rotated_copy_commands_EXTENSION_NAME"/>
+                <enum offset="0" extends="VkStructureType"                  name="VK_STRUCTURE_TYPE_COPY_COMMAND_TRANSFORM_INFO_QCOM"/>
+                <type name="VkCopyCommandTransformInfoQCOM"/>
             </require>
         </extension>
         <extension name="VK_KHR_extension_335" number="335" author="KHR" contact="Mark Bellamy @mark.bellamy_arm" supported="disabled">
@@ -13602,10 +14264,12 @@ typedef void <name>CAMetalLayer</name>;
                 <enum value="&quot;VK_KHR_extension_335&quot;"              name="VK_KHR_EXTENSION_335_EXTENSION_NAME"/>
             </require>
         </extension>
-        <extension name="VK_EXT_extension_336" number="336" author="EXT" contact="Graeme Leese @gnl21" supported="disabled">
+        <extension name="VK_EXT_image_robustness" number="336" type="device" author="EXT" contact="Graeme Leese @gnl21" supported="vulkan" requires="VK_KHR_get_physical_device_properties2">
             <require>
-                <enum value="0"                                             name="VK_EXT_EXTENSION_336_SPEC_VERSION"/>
-                <enum value="&quot;VK_EXT_extension_336&quot;"              name="VK_EXT_EXTENSION_336_EXTENSION_NAME"/>
+                <enum value="1"                                             name="VK_EXT_IMAGE_ROBUSTNESS_SPEC_VERSION"/>
+                <enum value="&quot;VK_EXT_image_robustness&quot;"           name="VK_EXT_IMAGE_ROBUSTNESS_EXTENSION_NAME"/>
+                <enum offset="0" extends="VkStructureType" name="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_IMAGE_ROBUSTNESS_FEATURES_EXT"/>
+                <type name="VkPhysicalDeviceImageRobustnessFeaturesEXT"/>
             </require>
         </extension>
         <extension name="VK_KHR_extension_337" number="337" type="device" author="KHR" contact="Caio Marcelo de Oliveira Filho @cmarcelo" supported="disabled">
@@ -13614,10 +14278,38 @@ typedef void <name>CAMetalLayer</name>;
                 <enum value="&quot;VK_KHR_extension_337&quot;"              name="VK_KHR_EXTENSION_337_EXTENSION_NAME"/>
             </require>
         </extension>
-        <extension name="VK_KHR_extension_338" number="338" author="KHR" contact="Jeff Leger @jackohound" supported="disabled">
+        <extension name="VK_KHR_copy_commands2" number="338" author="KHR" type="device" contact="Jeff Leger @jackohound" supported="vulkan">
             <require>
-                <enum value="0"                                             name="VK_KHR_EXTENSION_338_SPEC_VERSION"/>
-                <enum value="&quot;VK_KHR_extension_338&quot;"              name="VK_KHR_EXTENSION_338_EXTENSION_NAME"/>
+                <enum value="1"                                             name="VK_KHR_COPY_COMMANDS_2_SPEC_VERSION"/>
+                <enum value="&quot;VK_KHR_copy_commands2&quot;"             name="VK_KHR_COPY_COMMANDS_2_EXTENSION_NAME"/>
+                <enum offset="0" extends="VkStructureType"                  name="VK_STRUCTURE_TYPE_COPY_BUFFER_INFO_2_KHR"/>
+                <enum offset="1" extends="VkStructureType"                  name="VK_STRUCTURE_TYPE_COPY_IMAGE_INFO_2_KHR"/>
+                <enum offset="2" extends="VkStructureType"                  name="VK_STRUCTURE_TYPE_COPY_BUFFER_TO_IMAGE_INFO_2_KHR"/>
+                <enum offset="3" extends="VkStructureType"                  name="VK_STRUCTURE_TYPE_COPY_IMAGE_TO_BUFFER_INFO_2_KHR"/>
+                <enum offset="4" extends="VkStructureType"                  name="VK_STRUCTURE_TYPE_BLIT_IMAGE_INFO_2_KHR"/>
+                <enum offset="5" extends="VkStructureType"                  name="VK_STRUCTURE_TYPE_RESOLVE_IMAGE_INFO_2_KHR"/>
+                <enum offset="6" extends="VkStructureType"                  name="VK_STRUCTURE_TYPE_BUFFER_COPY_2_KHR"/>
+                <enum offset="7" extends="VkStructureType"                  name="VK_STRUCTURE_TYPE_IMAGE_COPY_2_KHR"/>
+                <enum offset="8" extends="VkStructureType"                  name="VK_STRUCTURE_TYPE_IMAGE_BLIT_2_KHR"/>
+                <enum offset="9" extends="VkStructureType"                  name="VK_STRUCTURE_TYPE_BUFFER_IMAGE_COPY_2_KHR"/>
+                <enum offset="10" extends="VkStructureType"                 name="VK_STRUCTURE_TYPE_IMAGE_RESOLVE_2_KHR"/>
+                <type name="VkCopyBufferInfo2KHR"/>
+                <type name="VkCopyImageInfo2KHR"/>
+                <type name="VkCopyBufferToImageInfo2KHR"/>
+                <type name="VkCopyImageToBufferInfo2KHR"/>
+                <type name="VkBlitImageInfo2KHR"/>
+                <type name="VkResolveImageInfo2KHR"/>
+                <type name="VkBufferCopy2KHR"/>
+                <type name="VkImageCopy2KHR"/>
+                <type name="VkImageBlit2KHR"/>
+                <type name="VkBufferImageCopy2KHR"/>
+                <type name="VkImageResolve2KHR"/>
+                <command name="vkCmdCopyBuffer2KHR"/>
+                <command name="vkCmdCopyImage2KHR"/>
+                <command name="vkCmdCopyBufferToImage2KHR"/>
+                <command name="vkCmdCopyImageToBuffer2KHR"/>
+                <command name="vkCmdBlitImage2KHR"/>
+                <command name="vkCmdResolveImage2KHR"/>
             </require>
         </extension>
         <extension name="VK_ARM_extension_339" number="339" author="ARM" contact="Jan-Harald Fredriksen @janharaldfredriksen-arm" supported="disabled">
@@ -13632,10 +14324,14 @@ typedef void <name>CAMetalLayer</name>;
                 <enum value="&quot;VK_EXT_extension_340&quot;"              name="VK_EXT_EXTENSION_340_EXTENSION_NAME"/>
             </require>
         </extension>
-        <extension name="VK_EXT_extension_341" number="341" author="EXT" contact="Joshua Ashton @Joshua-Ashton" supported="disabled">
+        <extension name="VK_EXT_4444_formats" number="341" type="device" requires="VK_KHR_get_physical_device_properties2" author="EXT" contact="Joshua Ashton @Joshua-Ashton" supported="vulkan">
             <require>
-                <enum value="0"                                             name="VK_EXT_EXTENSION_341_SPEC_VERSION"/>
-                <enum value="&quot;VK_EXT_extension_341&quot;"              name="VK_EXT_EXTENSION_341_EXTENSION_NAME"/>
+                <enum value="1"                                             name="VK_EXT_4444_FORMATS_SPEC_VERSION"/>
+                <enum value="&quot;VK_EXT_4444_formats&quot;"               name="VK_EXT_4444_FORMATS_EXTENSION_NAME"/>
+                <enum offset="0" extends="VkStructureType"                  name="VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_4444_FORMATS_FEATURES_EXT"/>
+                <enum offset="0" extends="VkFormat"                         name="VK_FORMAT_A4R4G4B4_UNORM_PACK16_EXT"/>
+                <enum offset="1" extends="VkFormat"                         name="VK_FORMAT_A4B4G4R4_UNORM_PACK16_EXT"/>
+                <type name="VkPhysicalDevice4444FormatsFeaturesEXT"/>
             </require>
         </extension>
         <extension name="VK_EXT_extension_342" number="342" author="EXT" contact="Ralph Potter gitlab:@r_potter" supported="disabled">
@@ -13665,8 +14361,737 @@ typedef void <name>CAMetalLayer</name>;
         <extension name="VK_NV_extension_346" number="346" author="NV" contact="Jeff Juliano @jjuliano" supported="disabled">
             <require>
                 <enum value="0"                                             name="VK_NV_EXTENSION_346_SPEC_VERSION"/>
-                <enum value="&quot;VK_NV_extension_346&quot;"       name="VK_NV_EXTENSION_346_EXTENSION_NAME"/>
+                <enum value="&quot;VK_NV_extension_346&quot;"               name="VK_NV_EXTENSION_346_EXTENSION_NAME"/>
+            </require>
+        </extension>
+        <extension name="VK_EXT_directfb_surface" number="347" type="instance" requires="VK_KHR_surface" platform="directfb" supported="vulkan" author="EXT" contact="Nicolas Caramelli @caramelli">
+            <require>
+                <enum value="1"                                             name="VK_EXT_DIRECTFB_SURFACE_SPEC_VERSION"/>
+                <enum value="&quot;VK_EXT_directfb_surface&quot;"           name="VK_EXT_DIRECTFB_SURFACE_EXTENSION_NAME"/>
+                <enum offset="0" extends="VkStructureType"                  name="VK_STRUCTURE_TYPE_DIRECTFB_SURFACE_CREATE_INFO_EXT"/>
+                <type name="VkDirectFBSurfaceCreateFlagsEXT"/>
+                <type name="VkDirectFBSurfaceCreateInfoEXT"/>
+                <command name="vkCreateDirectFBSurfaceEXT"/>
+                <command name="vkGetPhysicalDeviceDirectFBPresentationSupportEXT"/>
+            </require>
+        </extension>
+        <extension name="VK_KHR_extension_350" number="350" author="KHR" contact="Mark Bellamy @mark.bellamy_arm" supported="disabled">
+            <require>
+                <enum value="0"                                             name="VK_KHR_EXTENSION_350_SPEC_VERSION"/>
+                <enum value="&quot;VK_KHR_extension_350&quot;"              name="VK_KHR_EXTENSION_350_EXTENSION_NAME"/>
+                <enum bitpos="2"  extends="VkPipelineCacheCreateFlagBits"   name="VK_PIPELINE_CACHE_CREATE_RESERVED_2_BIT_EXT"/>
+            </require>
+        </extension>
+        <extension name="VK_NV_extension_351" number="351" author="NV" contact="Liam Middlebrook @liam-middlebrook" supported="disabled">
+            <require>
+                <enum value="0"                                             name="VK_NV_EXTENSION_351_SPEC_VERSION"/>
+                <enum value="&quot;VK_NV_extension_351&quot;"               name="VK_NV_EXTENSION_351_EXTENSION_NAME"/>
+            </require>
+        </extension>
+        <extension name="VK_VALVE_extension_352" number="352" author="VALVE" contact="Joshua Ashton @Joshua-Ashton,Hans-Kristian Arntzen @HansKristian-Work" supported="disabled">
+            <require>
+                <enum value="0"                                                name="VK_VALVE_EXTENSION_352_SPEC_VERSION"/>
+                <enum value="&quot;VK_VALVE_extension_352&quot;"               name="VK_VALVE_EXTENSION_352_EXTENSION_NAME"/>
+                <enum bitpos="2" extends="VkDescriptorPoolCreateFlagBits"      name="VK_DESCRIPTOR_POOL_RESERVED_2_BIT_VALVE"/>
+                <enum bitpos="2" extends="VkDescriptorSetLayoutCreateFlagBits" name="VK_DESCRIPTOR_SET_LAYOUT_RESERVED_2_BIT_VALVE"/>
+            </require>
+        </extension>
+        <extension name="VK_EXT_extension_353" number="353" author="EXT" contact="Piers Daniell @pdaniell-nv" supported="disabled">
+            <require>
+                <enum value="0"                                             name="VK_EXT_EXTENSION_353_SPEC_VERSION"/>
+                <enum value="&quot;VK_EXT_extension_353&quot;"              name="VK_EXT_EXTENSION_353_EXTENSION_NAME"/>
+            </require>
+        </extension>
+        <extension name="VK_EXT_extension_354" number="354" author="EXT" contact="Simon Ser @emersion" supported="disabled">
+            <require>
+                <enum value="0"                                             name="VK_EXT_EXTENSION_354_SPEC_VERSION"/>
+                <enum value="&quot;VK_EXT_extension_354&quot;"              name="VK_EXT_EXTENSION_354_EXTENSION_NAME"/>
+            </require>
+        </extension>
+        <extension name="VK_EXT_extension_355" number="355" author="EXT" contact="Ralph Potter gitlab:@r_potter" supported="disabled">
+            <require>
+                <enum value="0"                                             name="VK_EXT_EXTENSION_355_SPEC_VERSION"/>
+                <enum value="&quot;VK_EXT_extension_355&quot;"              name="VK_EXT_EXTENSION_355_EXTENSION_NAME"/>
+            </require>
+        </extension>
+        <extension name="VK_EXT_vertex_attribute_aliasing" number="356" type="device" author="EXT" contact="Shahbaz Youssefi @syoussefi" supported="disabled" specialuse="glemulation">
+            <require>
+                <enum value="0"                                             name="VK_EXT_VERTEX_ATTRIBUTE_ALIASING_SPEC_VERSION"/>
+                <enum value="&quot;VK_EXT_vertex_attribute_aliasing&quot;"  name="VK_EXT_VERTEX_ATTRIBUTE_ALIASING_EXTENSION_NAME"/>
+            </require>
+        </extension>
+        <extension name="VK_EXT_extension_357" number="357" author="EXT" contact="Courtney Goeltzenleuchter @courtney-g" supported="disabled" specialuse="glemulation">
+            <require>
+                <enum value="0"                                             name="VK_EXT_EXTENSION_357"/>
+                <enum value="&quot;VK_EXT_extension_357&quot;"              name="VK_EXT_EXTENSION_357"/>
+            </require>
+        </extension>
+        <extension name="VK_KHR_extension_358" number="358" author="KHR" contact="Jeff Bolz @jeffbolznv" supported="disabled">
+            <require>
+                <enum value="0"                                             name="VK_KHR_EXTENSION_358_SPEC_VERSION"/>
+                <enum value="&quot;VK_KHR_extension_358&quot;"              name="VK_KHR_EXTENSION_358_EXTENSION_NAME"/>
+            </require>
+        </extension>
+        <extension name="VK_EXT_extension_359" number="359" author="EXT" contact="Bill Hollings @billhollings" supported="disabled" specialuse="glemulation">
+            <require>
+                <enum value="0"                                             name="VK_EXT_EXTENSION_359"/>
+                <enum value="&quot;VK_EXT_extension_359&quot;"              name="VK_EXT_EXTENSION_359"/>
+            </require>
+        </extension>
+        <extension name="VK_EXT_extension_360" number="360" author="EXT" contact="Bill Hollings @billhollings" supported="disabled" specialuse="glemulation">
+            <require>
+                <enum value="0"                                             name="VK_EXT_EXTENSION_360"/>
+                <enum value="&quot;VK_EXT_extension_360&quot;"              name="VK_EXT_EXTENSION_360"/>
+            </require>
+        </extension>
+        <extension name="VK_KHR_extension_361" number="361" author="KHR" contact="Lionel Landwerlin @llandwerlin" supported="disabled">
+            <require>
+                <enum value="0"                                             name="VK_EXT_EXTENSION_361"/>
+                <enum value="&quot;VK_EXT_extension_361&quot;"              name="VK_EXT_EXTENSION_361"/>
+            </require>
+        </extension>
+        <extension name="VK_EXT_extension_362" number="362" author="EXT" contact="Lionel Duc @nvlduc" supported="disabled">
+            <require>
+                <enum value="0"                                             name="VK_EXT_EXTENSION_362_SPEC_VERSION"/>
+                <enum value="&quot;VK_EXT_extension_362&quot;"              name="VK_EXT_EXTENSION_362_EXTENSION_NAME"/>
+            </require>
+        </extension>
+        <extension name="VK_EXT_extension_363" number="363" author="EXT" contact="Kaye Mason @chaleur" supported="disabled">
+            <require>
+                <enum value="0"                                             name="VK_EXT_EXTENSION_363_SPEC_VERSION"/>
+                <enum value="&quot;VK_EXT_extension_363&quot;"              name="VK_EXT_EXTENSION_363_EXTENSION_NAME"/>
+            </require>
+        </extension>
+        <extension name="VK_FUCHSIA_extension_364" number="364" author="FUCHSIA" contact="Craig Stout @cdotstout" supported="disabled">
+            <require>
+                <enum value="0"                                             name="VK_EXT_EXTENSION_364_SPEC_VERSION"/>
+                <enum value="&quot;VK_EXT_extension_364&quot;"              name="VK_EXT_EXTENSION_364_EXTENSION_NAME"/>
+            </require>
+        </extension>
+        <extension name="VK_FUCHSIA_extension_365" number="365" author="FUCHSIA" contact="Craig Stout @cdotstout" supported="disabled">
+            <require>
+                <enum value="0"                                             name="VK_EXT_EXTENSION_365_SPEC_VERSION"/>
+                <enum value="&quot;VK_EXT_extension_365&quot;"              name="VK_EXT_EXTENSION_365_EXTENSION_NAME"/>
+            </require>
+        </extension>
+        <extension name="VK_FUCHSIA_extension_366" number="366" author="FUCHSIA" contact="Craig Stout @cdotstout" supported="disabled">
+            <require>
+                <enum value="0"                                             name="VK_EXT_EXTENSION_366_SPEC_VERSION"/>
+                <enum value="&quot;VK_EXT_extension_366&quot;"              name="VK_EXT_EXTENSION_366_EXTENSION_NAME"/>
+            </require>
+        </extension>
+        <extension name="VK_FUCHSIA_extension_367" number="367" author="FUCHSIA" contact="Craig Stout @cdotstout" supported="disabled">
+            <require>
+                <enum value="0"                                             name="VK_EXT_EXTENSION_367_SPEC_VERSION"/>
+                <enum value="&quot;VK_EXT_extension_367&quot;"              name="VK_EXT_EXTENSION_367_EXTENSION_NAME"/>
+            </require>
+        </extension>
+        <extension name="VK_FUCHSIA_extension_368" number="368" author="FUCHSIA" contact="Craig Stout @cdotstout" supported="disabled">
+            <require>
+                <enum value="0"                                             name="VK_EXT_EXTENSION_368_SPEC_VERSION"/>
+                <enum value="&quot;VK_EXT_extension_368&quot;"              name="VK_EXT_EXTENSION_368_EXTENSION_NAME"/>
+            </require>
+        </extension>
+        <extension name="VK_QCOM_extension_369" number="369" author="QCOM" contact="Matthew Netsch @mnetsch" supported="disabled">
+            <require>
+                <enum value="0"                                         name="VK_QCOM_EXTENSION_369_SPEC_VERSION"/>
+                <enum value="&quot;VK_QCOM_extension_369&quot;"         name="VK_QCOM_EXTENSION_369_EXTENSION_NAME"/>
+                <enum bitpos="4" extends="VkDescriptorBindingFlagBits"  name="VK_DESCRIPTOR_BINDING_RESERVED_4_BIT_QCOM"/>
+            </require>
+        </extension>
+        <extension name="VK_HUAWEI_extension_370" number="370" author="HUAWEI" contact="Hueilong Wang @wyvernathuawei" supported="disabled">
+            <require>
+                <enum value="0"                                         name="VK_HUAWEI_EXTENSION_370_SPEC_VERSION"/>
+                <enum value="&quot;VK_HUAWEI_extension_370&quot;"         name="VK_HUAWEI_EXTENSION_370_EXTENSION_NAME"/>
+            </require>
+        </extension>
+        <extension name="VK_HUAWEI_extension_371" number="371" author="HUAWEI" contact="Hueilong Wang @wyvernathuawei" supported="disabled">
+            <require>
+                <enum value="0"                                         name="VK_HUAWEI_EXTENSION_371_SPEC_VERSION"/>
+                <enum value="&quot;VK_HUAWEI_extension_371&quot;"         name="VK_HUAWEI_EXTENSION_371_EXTENSION_NAME"/>
+            </require>
+        </extension>
+        <extension name="VK_NV_extension_372" number="372" author="NV" contact="Carsten Rohde @crohde" supported="disabled">
+            <require>
+                <enum value="0"                                         name="VK_NV_EXTENSION_372_SPEC_VERSION"/>
+                <enum value="&quot;VK_NV_extension_372&quot;"           name="VK_NV_EXTENSION_372_EXTENSION_NAME"/>
+                <enum bitpos="5" extends="VkBufferCreateFlagBits"       name="VK_BUFFER_CREATE_RESERVED_5_BIT_NV"/>
+                <enum bitpos="15" extends="VkImageCreateFlagBits"       name="VK_IMAGE_CREATE_RESERVED_15_BIT_NV"/>
+            </require>
+        </extension>
+        <extension name="VK_NV_extension_373" number="373" author="NV" contact="Daniel Koch @dgkoch" supported="disabled">
+            <require>
+                <enum value="0"                                         name="VK_NV_EXTENSION_373_SPEC_VERSION"/>
+                <enum value="&quot;VK_NV_extension_373&quot;"           name="VK_NV_EXTENSION_373_EXTENSION_NAME"/>
+            </require>
+        </extension>
+        <extension name="VK_NV_extension_374" number="374" author="NV" contact="Daniel Koch @dgkoch" supported="disabled">
+            <require>
+                <enum value="0"                                         name="VK_NV_EXTENSION_374_SPEC_VERSION"/>
+                <enum value="&quot;VK_NV_extension_374&quot;"           name="VK_NV_EXTENSION_374_EXTENSION_NAME"/>
+            </require>
+        </extension>
+        <extension name="VK_NV_extension_375" number="375" author="NV" contact="Daniel Koch @dgkoch" supported="disabled">
+            <require>
+                <enum value="0"                                         name="VK_NV_EXTENSION_375_SPEC_VERSION"/>
+                <enum value="&quot;VK_NV_extension_375&quot;"           name="VK_NV_EXTENSION_375_EXTENSION_NAME"/>
+            </require>
+        </extension>
+        <extension name="VK_EXT_extension_376" number="376" author="EXT" contact="Shahbaz Youssefi @syoussefi" supported="disabled">
+            <require>
+                <enum value="0"                                         name="VK_EXT_EXTENSION_376_SPEC_VERSION"/>
+                <enum value="&quot;VK_EXT_extension_376&quot;"          name="VK_EXT_EXTENSION_376_EXTENSION_NAME"/>
+            </require>
+        </extension>
+        <extension name="VK_EXT_extension_377" number="377" author="EXT" contact="Hugues Evrard @hevrard" supported="disabled">
+            <require>
+                <enum value="0"                                         name="VK_EXT_EXTENSION_377_SPEC_VERSION"/>
+                <enum value="&quot;VK_EXT_extension_377&quot;"          name="VK_EXT_EXTENSION_377_EXTENSION_NAME"/>
             </require>
         </extension>
     </extensions>
+    <spirvextensions comment="SPIR-V Extensions allowed in Vulkan and what is required to use it">
+        <spirvextension name="SPV_KHR_variable_pointers">
+            <enable version="VK_API_VERSION_1_1"/>
+            <enable extension="VK_KHR_variable_pointers"/>
+        </spirvextension>
+        <spirvextension name="SPV_AMD_shader_explicit_vertex_parameter">
+            <enable extension="VK_AMD_shader_explicit_vertex_parameter"/>
+        </spirvextension>
+        <spirvextension name="SPV_AMD_gcn_shader">
+            <enable extension="VK_AMD_gcn_shader"/>
+        </spirvextension>
+        <spirvextension name="SPV_AMD_gpu_shader_half_float">
+            <enable extension="VK_AMD_gpu_shader_half_float"/>
+        </spirvextension>
+        <spirvextension name="SPV_AMD_gpu_shader_int16">
+            <enable extension="VK_AMD_gpu_shader_int16"/>
+        </spirvextension>
+        <spirvextension name="SPV_AMD_shader_ballot">
+            <enable extension="VK_AMD_shader_ballot"/>
+        </spirvextension>
+        <spirvextension name="SPV_AMD_shader_fragment_mask">
+            <enable extension="VK_AMD_shader_fragment_mask"/>
+        </spirvextension>
+        <spirvextension name="SPV_AMD_shader_image_load_store_lod">
+            <enable extension="VK_AMD_shader_image_load_store_lod"/>
+        </spirvextension>
+        <spirvextension name="SPV_AMD_shader_trinary_minmax">
+            <enable extension="VK_AMD_shader_trinary_minmax"/>
+        </spirvextension>
+        <spirvextension name="SPV_AMD_texture_gather_bias_lod">
+            <enable extension="VK_AMD_texture_gather_bias_lod"/>
+        </spirvextension>
+        <spirvextension name="SPV_KHR_shader_draw_parameters">
+            <enable version="VK_API_VERSION_1_1"/>
+            <enable extension="VK_KHR_shader_draw_parameters"/>
+        </spirvextension>
+        <spirvextension name="SPV_KHR_8bit_storage">
+            <enable version="VK_API_VERSION_1_2"/>
+            <enable extension="VK_KHR_8bit_storage"/>
+        </spirvextension>
+        <spirvextension name="SPV_KHR_16bit_storage">
+            <enable version="VK_API_VERSION_1_1"/>
+            <enable extension="VK_KHR_16bit_storage"/>
+        </spirvextension>
+        <spirvextension name="SPV_KHR_shader_clock">
+            <enable extension="VK_KHR_shader_clock"/>
+        </spirvextension>
+        <spirvextension name="SPV_KHR_float_controls">
+            <enable version="VK_API_VERSION_1_2"/>
+            <enable extension="VK_KHR_shader_float_controls"/>
+        </spirvextension>
+        <spirvextension name="SPV_KHR_storage_buffer_storage_class">
+            <enable version="VK_API_VERSION_1_1"/>
+            <enable extension="VK_KHR_storage_buffer_storage_class"/>
+        </spirvextension>
+        <spirvextension name="SPV_KHR_post_depth_coverage">
+            <enable extension="VK_EXT_post_depth_coverage"/>
+        </spirvextension>
+        <spirvextension name="SPV_EXT_shader_stencil_export">
+            <enable extension="VK_EXT_shader_stencil_export"/>
+        </spirvextension>
+        <spirvextension name="SPV_KHR_shader_ballot">
+            <enable extension="VK_EXT_shader_subgroup_ballot"/>
+        </spirvextension>
+        <spirvextension name="SPV_KHR_subgroup_vote">
+            <enable extension="VK_EXT_shader_subgroup_vote"/>
+        </spirvextension>
+        <spirvextension name="SPV_NV_sample_mask_override_coverage">
+            <enable extension="VK_NV_sample_mask_override_coverage"/>
+        </spirvextension>
+        <spirvextension name="SPV_NV_geometry_shader_passthrough">
+            <enable extension="VK_NV_geometry_shader_passthrough"/>
+        </spirvextension>
+        <spirvextension name="SPV_NV_mesh_shader">
+            <enable extension="VK_NV_mesh_shader"/>
+        </spirvextension>
+        <spirvextension name="SPV_NV_viewport_array2">
+            <enable extension="VK_NV_viewport_array2"/>
+        </spirvextension>
+        <spirvextension name="SPV_NV_shader_subgroup_partitioned">
+            <enable extension="VK_NV_shader_subgroup_partitioned"/>
+        </spirvextension>
+        <spirvextension name="SPV_EXT_shader_viewport_index_layer">
+            <enable version="VK_API_VERSION_1_2"/>
+            <enable extension="VK_EXT_shader_viewport_index_layer"/>
+        </spirvextension>
+        <spirvextension name="SPV_NVX_multiview_per_view_attributes">
+            <enable extension="VK_NVX_multiview_per_view_attributes"/>
+        </spirvextension>
+        <spirvextension name="SPV_EXT_descriptor_indexing">
+            <enable version="VK_API_VERSION_1_2"/>
+            <enable extension="VK_EXT_descriptor_indexing"/>
+        </spirvextension>
+        <spirvextension name="SPV_KHR_vulkan_memory_model">
+            <enable version="VK_API_VERSION_1_2"/>
+            <enable extension="VK_KHR_vulkan_memory_model"/>
+        </spirvextension>
+        <spirvextension name="SPV_NV_compute_shader_derivatives">
+            <enable extension="VK_NV_compute_shader_derivatives"/>
+        </spirvextension>
+        <spirvextension name="SPV_NV_fragment_shader_barycentric">
+            <enable extension="VK_NV_fragment_shader_barycentric"/>
+        </spirvextension>
+        <spirvextension name="SPV_NV_shader_image_footprint">
+            <enable extension="VK_NV_shader_image_footprint"/>
+        </spirvextension>
+        <spirvextension name="SPV_NV_shading_rate">
+            <enable extension="VK_NV_shading_rate_image"/>
+        </spirvextension>
+        <spirvextension name="SPV_NV_ray_tracing">
+            <enable extension="VK_NV_ray_tracing"/>
+        </spirvextension>
+        <spirvextension name="SPV_KHR_ray_tracing">
+            <enable extension="VK_KHR_ray_tracing_pipeline"/>
+        </spirvextension>
+        <spirvextension name="SPV_KHR_ray_query">
+            <enable extension="VK_KHR_ray_query"/>
+        </spirvextension>
+        <spirvextension name="SPV_GOOGLE_hlsl_functionality1">
+            <enable extension="VK_GOOGLE_hlsl_functionality1"/>
+        </spirvextension>
+        <spirvextension name="SPV_GOOGLE_user_type">
+            <enable extension="VK_GOOGLE_user_type"/>
+        </spirvextension>
+        <spirvextension name="SPV_GOOGLE_decorate_string">
+            <enable extension="VK_GOOGLE_decorate_string"/>
+        </spirvextension>
+        <spirvextension name="SPV_EXT_fragment_invocation_density">
+            <enable extension="VK_EXT_fragment_density_map"/>
+        </spirvextension>
+        <spirvextension name="SPV_KHR_physical_storage_buffer">
+            <enable version="VK_API_VERSION_1_2"/>
+            <enable extension="VK_KHR_buffer_device_address"/>
+        </spirvextension>
+        <spirvextension name="SPV_EXT_physical_storage_buffer">
+            <enable extension="VK_EXT_buffer_device_address"/>
+        </spirvextension>
+        <spirvextension name="SPV_NV_cooperative_matrix">
+            <enable extension="VK_NV_cooperative_matrix"/>
+        </spirvextension>
+        <spirvextension name="SPV_NV_shader_sm_builtins">
+            <enable extension="VK_NV_shader_sm_builtins"/>
+        </spirvextension>
+        <spirvextension name="SPV_EXT_fragment_shader_interlock">
+            <enable extension="VK_EXT_fragment_shader_interlock"/>
+        </spirvextension>
+        <spirvextension name="SPV_EXT_demote_to_helper_invocation">
+            <enable extension="VK_EXT_shader_demote_to_helper_invocation"/>
+        </spirvextension>
+        <spirvextension name="SPV_KHR_fragment_shading_rate">
+            <enable extension="VK_KHR_fragment_shading_rate"/>
+        </spirvextension>
+        <spirvextension name="SPV_KHR_non_semantic_info">
+            <enable extension="VK_KHR_shader_non_semantic_info"/>
+        </spirvextension>
+        <spirvextension name="SPV_EXT_shader_image_int64">
+            <enable extension="VK_EXT_shader_image_atomic_int64"/>
+        </spirvextension>
+        <spirvextension name="SPV_KHR_terminate_invocation">
+            <enable extension="VK_KHR_shader_terminate_invocation"/>
+        </spirvextension>
+    </spirvextensions>
+    <spirvcapabilities comment="SPIR-V Capabilities allowed in Vulkan and what is required to use it">
+        <spirvcapability name="Matrix">
+            <enable version="VK_API_VERSION_1_0"/>
+        </spirvcapability>
+        <spirvcapability name="Shader">
+            <enable version="VK_API_VERSION_1_0"/>
+        </spirvcapability>
+        <spirvcapability name="InputAttachment">
+            <enable version="VK_API_VERSION_1_0"/>
+        </spirvcapability>
+        <spirvcapability name="Sampled1D">
+            <enable version="VK_API_VERSION_1_0"/>
+        </spirvcapability>
+        <spirvcapability name="Image1D">
+            <enable version="VK_API_VERSION_1_0"/>
+        </spirvcapability>
+        <spirvcapability name="SampledBuffer">
+            <enable version="VK_API_VERSION_1_0"/>
+        </spirvcapability>
+        <spirvcapability name="ImageBuffer">
+            <enable version="VK_API_VERSION_1_0"/>
+        </spirvcapability>
+        <spirvcapability name="ImageQuery">
+            <enable version="VK_API_VERSION_1_0"/>
+        </spirvcapability>
+        <spirvcapability name="DerivativeControl">
+            <enable version="VK_API_VERSION_1_0"/>
+        </spirvcapability>
+        <spirvcapability name="Geometry">
+            <enable struct="VkPhysicalDeviceFeatures" feature="geometryShader"/>
+        </spirvcapability>
+        <spirvcapability name="Tessellation">
+            <enable struct="VkPhysicalDeviceFeatures" feature="tessellationShader"/>
+        </spirvcapability>
+        <spirvcapability name="Float64">
+            <enable struct="VkPhysicalDeviceFeatures" feature="shaderFloat64"/>
+        </spirvcapability>
+        <spirvcapability name="Int64">
+            <enable struct="VkPhysicalDeviceFeatures" feature="shaderInt64"/>
+        </spirvcapability>
+        <spirvcapability name="Int64Atomics">
+            <enable struct="VkPhysicalDeviceVulkan12Features" feature="shaderBufferInt64Atomics" requires="VK_VERSION_1_2,VK_KHR_shader_atomic_int64"/>
+            <enable struct="VkPhysicalDeviceVulkan12Features" feature="shaderSharedInt64Atomics" requires="VK_VERSION_1_2,VK_KHR_shader_atomic_int64"/>
+        </spirvcapability>
+        <spirvcapability name="AtomicFloat32AddEXT">
+            <enable struct="VkPhysicalDeviceShaderAtomicFloatFeaturesEXT" feature="shaderBufferFloat32AtomicAdd" requires="VK_EXT_shader_atomic_float"/>
+            <enable struct="VkPhysicalDeviceShaderAtomicFloatFeaturesEXT" feature="shaderSharedFloat32AtomicAdd" requires="VK_EXT_shader_atomic_float"/>
+            <enable struct="VkPhysicalDeviceShaderAtomicFloatFeaturesEXT" feature="shaderImageFloat32AtomicAdd" requires="VK_EXT_shader_atomic_float"/>
+            <enable struct="VkPhysicalDeviceShaderAtomicFloatFeaturesEXT" feature="sparseImageFloat32AtomicAdd" requires="VK_EXT_shader_atomic_float"/>
+        </spirvcapability>
+        <spirvcapability name="AtomicFloat64AddEXT">
+            <enable struct="VkPhysicalDeviceShaderAtomicFloatFeaturesEXT" feature="shaderBufferFloat64AtomicAdd" requires="VK_EXT_shader_atomic_float"/>
+            <enable struct="VkPhysicalDeviceShaderAtomicFloatFeaturesEXT" feature="shaderSharedFloat64AtomicAdd" requires="VK_EXT_shader_atomic_float"/>
+        </spirvcapability>
+        <spirvcapability name="Int64ImageEXT">
+            <enable struct="VkPhysicalDeviceShaderImageAtomicInt64FeaturesEXT" feature="shaderImageInt64Atomics" requires="VK_EXT_shader_image_atomic_int64"/>
+        </spirvcapability>
+        <spirvcapability name="Int16">
+            <enable struct="VkPhysicalDeviceFeatures" feature="shaderInt16"/>
+        </spirvcapability>
+        <spirvcapability name="TessellationPointSize">
+            <enable struct="VkPhysicalDeviceFeatures" feature="shaderTessellationAndGeometryPointSize"/>
+        </spirvcapability>
+        <spirvcapability name="GeometryPointSize">
+            <enable struct="VkPhysicalDeviceFeatures" feature="shaderTessellationAndGeometryPointSize"/>
+        </spirvcapability>
+        <spirvcapability name="ImageGatherExtended">
+            <enable struct="VkPhysicalDeviceFeatures" feature="shaderImageGatherExtended"/>
+        </spirvcapability>
+        <spirvcapability name="StorageImageMultisample">
+            <enable struct="VkPhysicalDeviceFeatures" feature="shaderStorageImageMultisample"/>
+        </spirvcapability>
+        <spirvcapability name="UniformBufferArrayDynamicIndexing">
+            <enable struct="VkPhysicalDeviceFeatures" feature="shaderUniformBufferArrayDynamicIndexing"/>
+        </spirvcapability>
+        <spirvcapability name="SampledImageArrayDynamicIndexing">
+            <enable struct="VkPhysicalDeviceFeatures" feature="shaderSampledImageArrayDynamicIndexing"/>
+        </spirvcapability>
+        <spirvcapability name="StorageBufferArrayDynamicIndexing">
+            <enable struct="VkPhysicalDeviceFeatures" feature="shaderStorageBufferArrayDynamicIndexing"/>
+        </spirvcapability>
+        <spirvcapability name="StorageImageArrayDynamicIndexing">
+            <enable struct="VkPhysicalDeviceFeatures" feature="shaderStorageImageArrayDynamicIndexing"/>
+        </spirvcapability>
+        <spirvcapability name="ClipDistance">
+            <enable struct="VkPhysicalDeviceFeatures" feature="shaderClipDistance"/>
+        </spirvcapability>
+        <spirvcapability name="CullDistance">
+            <enable struct="VkPhysicalDeviceFeatures" feature="shaderCullDistance"/>
+        </spirvcapability>
+        <spirvcapability name="ImageCubeArray">
+            <enable struct="VkPhysicalDeviceFeatures" feature="imageCubeArray"/>
+        </spirvcapability>
+        <spirvcapability name="SampleRateShading">
+            <enable struct="VkPhysicalDeviceFeatures" feature="sampleRateShading"/>
+        </spirvcapability>
+        <spirvcapability name="SparseResidency">
+            <enable struct="VkPhysicalDeviceFeatures" feature="shaderResourceResidency"/>
+        </spirvcapability>
+        <spirvcapability name="MinLod">
+            <enable struct="VkPhysicalDeviceFeatures" feature="shaderResourceMinLod"/>
+        </spirvcapability>
+        <spirvcapability name="SampledCubeArray">
+            <enable struct="VkPhysicalDeviceFeatures" feature="imageCubeArray"/>
+        </spirvcapability>
+        <spirvcapability name="ImageMSArray">
+            <enable struct="VkPhysicalDeviceFeatures" feature="shaderStorageImageMultisample"/>
+        </spirvcapability>
+        <spirvcapability name="StorageImageExtendedFormats">
+            <enable version="VK_API_VERSION_1_0"/>
+        </spirvcapability>
+        <spirvcapability name="InterpolationFunction">
+            <enable struct="VkPhysicalDeviceFeatures" feature="sampleRateShading"/>
+        </spirvcapability>
+        <spirvcapability name="StorageImageReadWithoutFormat">
+            <enable struct="VkPhysicalDeviceFeatures" feature="shaderStorageImageReadWithoutFormat"/>
+        </spirvcapability>
+        <spirvcapability name="StorageImageWriteWithoutFormat">
+            <enable struct="VkPhysicalDeviceFeatures" feature="shaderStorageImageWriteWithoutFormat"/>
+        </spirvcapability>
+        <spirvcapability name="MultiViewport">
+            <enable struct="VkPhysicalDeviceFeatures" feature="multiViewport"/>
+        </spirvcapability>
+        <spirvcapability name="DrawParameters">
+            <enable struct="VkPhysicalDeviceVulkan11Features" feature="shaderDrawParameters" requires="VK_VERSION_1_1"/>
+            <enable extension="VK_KHR_shader_draw_parameters"/>
+        </spirvcapability>
+        <spirvcapability name="MultiView">
+            <enable struct="VkPhysicalDeviceVulkan11Features" feature="multiview" requires="VK_VERSION_1_1,VK_KHR_multiview"/>
+        </spirvcapability>
+        <spirvcapability name="DeviceGroup">
+            <enable version="VK_API_VERSION_1_1"/>
+            <enable extension="VK_KHR_device_group"/>
+        </spirvcapability>
+        <spirvcapability name="VariablePointersStorageBuffer">
+            <enable struct="VkPhysicalDeviceVulkan11Features" feature="variablePointersStorageBuffer" requires="VK_VERSION_1_1,VK_KHR_variable_pointers"/>
+        </spirvcapability>
+        <spirvcapability name="VariablePointers">
+            <enable struct="VkPhysicalDeviceVulkan11Features" feature="variablePointers" requires="VK_VERSION_1_1,VK_KHR_variable_pointers"/>
+        </spirvcapability>
+        <spirvcapability name="ShaderClockKHR">
+            <enable extension="VK_KHR_shader_clock"/>
+        </spirvcapability>
+        <spirvcapability name="StencilExportEXT">
+            <enable extension="VK_EXT_shader_stencil_export"/>
+        </spirvcapability>
+        <spirvcapability name="SubgroupBallotKHR">
+            <enable extension="VK_EXT_shader_subgroup_ballot"/>
+        </spirvcapability>
+        <spirvcapability name="SubgroupVoteKHR">
+            <enable extension="VK_EXT_shader_subgroup_vote"/>
+        </spirvcapability>
+        <spirvcapability name="ImageReadWriteLodAMD">
+            <enable extension="VK_AMD_shader_image_load_store_lod"/>
+        </spirvcapability>
+        <spirvcapability name="ImageGatherBiasLodAMD">
+            <enable extension="VK_AMD_texture_gather_bias_lod"/>
+        </spirvcapability>
+        <spirvcapability name="FragmentMaskAMD">
+            <enable extension="VK_AMD_shader_fragment_mask"/>
+        </spirvcapability>
+        <spirvcapability name="SampleMaskOverrideCoverageNV">
+            <enable extension="VK_NV_sample_mask_override_coverage"/>
+        </spirvcapability>
+        <spirvcapability name="GeometryShaderPassthroughNV">
+            <enable extension="VK_NV_geometry_shader_passthrough"/>
+        </spirvcapability>
+        <spirvcapability name="ShaderViewportIndex">
+            <enable struct="VkPhysicalDeviceVulkan12Features" feature="shaderOutputViewportIndex" requires="VK_VERSION_1_2"/>
+        </spirvcapability>
+        <spirvcapability name="ShaderLayer">
+            <enable struct="VkPhysicalDeviceVulkan12Features" feature="shaderOutputLayer" requires="VK_VERSION_1_2"/>
+        </spirvcapability>
+        <spirvcapability name="ShaderViewportIndexLayerEXT">
+            <enable extension="VK_EXT_shader_viewport_index_layer"/>
+        </spirvcapability>
+        <spirvcapability name="ShaderViewportIndexLayerNV">
+            <enable extension="VK_NV_viewport_array2"/>
+        </spirvcapability>
+        <spirvcapability name="ShaderViewportMaskNV">
+            <enable extension="VK_NV_viewport_array2"/>
+        </spirvcapability>
+        <spirvcapability name="PerViewAttributesNV">
+            <enable extension="VK_NVX_multiview_per_view_attributes"/>
+        </spirvcapability>
+        <spirvcapability name="StorageBuffer16BitAccess">
+            <enable struct="VkPhysicalDeviceVulkan11Features" feature="storageBuffer16BitAccess" requires="VK_VERSION_1_1,VK_KHR_16bit_storage"/>
+        </spirvcapability>
+        <spirvcapability name="UniformAndStorageBuffer16BitAccess">
+            <enable struct="VkPhysicalDeviceVulkan11Features" feature="uniformAndStorageBuffer16BitAccess" requires="VK_VERSION_1_1,VK_KHR_16bit_storage"/>
+        </spirvcapability>
+        <spirvcapability name="StoragePushConstant16">
+            <enable struct="VkPhysicalDeviceVulkan11Features" feature="storagePushConstant16" requires="VK_VERSION_1_1,VK_KHR_16bit_storage"/>
+        </spirvcapability>
+        <spirvcapability name="StorageInputOutput16">
+            <enable struct="VkPhysicalDeviceVulkan11Features" feature="storageInputOutput16" requires="VK_VERSION_1_1,VK_KHR_16bit_storage"/>
+        </spirvcapability>
+        <spirvcapability name="GroupNonUniform">
+            <enable property="VkPhysicalDeviceVulkan11Properties" member="subgroupSupportedOperations" value="VK_SUBGROUP_FEATURE_BASIC_BIT" requires="VK_VERSION_1_1"/>
+        </spirvcapability>
+        <spirvcapability name="GroupNonUniformVote">
+            <enable property="VkPhysicalDeviceVulkan11Properties" member="subgroupSupportedOperations" value="VK_SUBGROUP_FEATURE_VOTE_BIT" requires="VK_VERSION_1_1"/>
+        </spirvcapability>
+        <spirvcapability name="GroupNonUniformArithmetic">
+            <enable property="VkPhysicalDeviceVulkan11Properties" member="subgroupSupportedOperations" value="VK_SUBGROUP_FEATURE_ARITHMETIC_BIT" requires="VK_VERSION_1_1"/>
+        </spirvcapability>
+        <spirvcapability name="GroupNonUniformBallot">
+            <enable property="VkPhysicalDeviceVulkan11Properties" member="subgroupSupportedOperations" value="VK_SUBGROUP_FEATURE_BALLOT_BIT" requires="VK_VERSION_1_1"/>
+        </spirvcapability>
+        <spirvcapability name="GroupNonUniformShuffle">
+            <enable property="VkPhysicalDeviceVulkan11Properties" member="subgroupSupportedOperations" value="VK_SUBGROUP_FEATURE_SHUFFLE_BIT" requires="VK_VERSION_1_1"/>
+        </spirvcapability>
+        <spirvcapability name="GroupNonUniformShuffleRelative">
+            <enable property="VkPhysicalDeviceVulkan11Properties" member="subgroupSupportedOperations" value="VK_SUBGROUP_FEATURE_SHUFFLE_RELATIVE_BIT" requires="VK_VERSION_1_1"/>
+        </spirvcapability>
+        <spirvcapability name="GroupNonUniformClustered">
+            <enable property="VkPhysicalDeviceVulkan11Properties" member="subgroupSupportedOperations" value="VK_SUBGROUP_FEATURE_CLUSTERED_BIT" requires="VK_VERSION_1_1"/>
+        </spirvcapability>
+        <spirvcapability name="GroupNonUniformQuad">
+            <enable property="VkPhysicalDeviceVulkan11Properties" member="subgroupSupportedOperations" value="VK_SUBGROUP_FEATURE_QUAD_BIT" requires="VK_VERSION_1_1"/>
+        </spirvcapability>
+        <spirvcapability name="GroupNonUniformPartitionedNV">
+            <enable property="VkPhysicalDeviceVulkan11Properties" member="subgroupSupportedOperations" value="VK_SUBGROUP_FEATURE_PARTITIONED_BIT_NV" requires="VK_NV_shader_subgroup_partitioned"/>
+        </spirvcapability>
+        <spirvcapability name="SampleMaskPostDepthCoverage">
+            <enable extension="VK_EXT_post_depth_coverage"/>
+        </spirvcapability>
+        <spirvcapability name="ShaderNonUniform">
+            <enable version="VK_API_VERSION_1_2"/>
+            <enable extension="VK_EXT_descriptor_indexing"/>
+        </spirvcapability>
+        <spirvcapability name="RuntimeDescriptorArray">
+            <enable struct="VkPhysicalDeviceVulkan12Features" feature="runtimeDescriptorArray" requires="VK_VERSION_1_2,VK_EXT_descriptor_indexing"/>
+        </spirvcapability>
+        <spirvcapability name="InputAttachmentArrayDynamicIndexing">
+            <enable struct="VkPhysicalDeviceVulkan12Features" feature="shaderInputAttachmentArrayDynamicIndexing" requires="VK_VERSION_1_2,VK_EXT_descriptor_indexing"/>
+        </spirvcapability>
+        <spirvcapability name="UniformTexelBufferArrayDynamicIndexing">
+            <enable struct="VkPhysicalDeviceVulkan12Features" feature="shaderUniformTexelBufferArrayDynamicIndexing" requires="VK_VERSION_1_2,VK_EXT_descriptor_indexing"/>
+        </spirvcapability>
+        <spirvcapability name="StorageTexelBufferArrayDynamicIndexing">
+            <enable struct="VkPhysicalDeviceVulkan12Features" feature="shaderStorageTexelBufferArrayDynamicIndexing" requires="VK_VERSION_1_2,VK_EXT_descriptor_indexing"/>
+        </spirvcapability>
+        <spirvcapability name="UniformBufferArrayNonUniformIndexing">
+            <enable struct="VkPhysicalDeviceVulkan12Features" feature="shaderUniformBufferArrayNonUniformIndexing" requires="VK_VERSION_1_2,VK_EXT_descriptor_indexing"/>
+        </spirvcapability>
+        <spirvcapability name="SampledImageArrayNonUniformIndexing">
+            <enable struct="VkPhysicalDeviceVulkan12Features" feature="shaderSampledImageArrayNonUniformIndexing" requires="VK_VERSION_1_2,VK_EXT_descriptor_indexing"/>
+        </spirvcapability>
+        <spirvcapability name="StorageBufferArrayNonUniformIndexing">
+            <enable struct="VkPhysicalDeviceVulkan12Features" feature="shaderStorageBufferArrayNonUniformIndexing" requires="VK_VERSION_1_2,VK_EXT_descriptor_indexing"/>
+        </spirvcapability>
+        <spirvcapability name="StorageImageArrayNonUniformIndexing">
+            <enable struct="VkPhysicalDeviceVulkan12Features" feature="shaderStorageImageArrayNonUniformIndexing" requires="VK_VERSION_1_2,VK_EXT_descriptor_indexing"/>
+        </spirvcapability>
+        <spirvcapability name="InputAttachmentArrayNonUniformIndexing">
+            <enable struct="VkPhysicalDeviceVulkan12Features" feature="shaderInputAttachmentArrayNonUniformIndexing" requires="VK_VERSION_1_2,VK_EXT_descriptor_indexing"/>
+        </spirvcapability>
+        <spirvcapability name="UniformTexelBufferArrayNonUniformIndexing">
+            <enable struct="VkPhysicalDeviceVulkan12Features" feature="shaderUniformTexelBufferArrayNonUniformIndexing" requires="VK_VERSION_1_2,VK_EXT_descriptor_indexing"/>
+        </spirvcapability>
+        <spirvcapability name="StorageTexelBufferArrayNonUniformIndexing">
+            <enable struct="VkPhysicalDeviceVulkan12Features" feature="shaderStorageTexelBufferArrayNonUniformIndexing" requires="VK_VERSION_1_2,VK_EXT_descriptor_indexing"/>
+        </spirvcapability>
+        <spirvcapability name="Float16">
+            <enable struct="VkPhysicalDeviceVulkan12Features" feature="shaderFloat16" requires="VK_VERSION_1_2,VK_KHR_shader_float16_int8"/>
+            <enable extension="VK_AMD_gpu_shader_half_float"/>
+        </spirvcapability>
+        <spirvcapability name="Int8">
+            <enable struct="VkPhysicalDeviceVulkan12Features" feature="shaderInt8" requires="VK_VERSION_1_2,VK_KHR_shader_float16_int8"/>
+        </spirvcapability>
+        <spirvcapability name="StorageBuffer8BitAccess">
+            <enable struct="VkPhysicalDeviceVulkan12Features" feature="storageBuffer8BitAccess" requires="VK_VERSION_1_2,VK_KHR_8bit_storage"/>
+        </spirvcapability>
+        <spirvcapability name="UniformAndStorageBuffer8BitAccess">
+            <enable struct="VkPhysicalDeviceVulkan12Features" feature="uniformAndStorageBuffer8BitAccess" requires="VK_VERSION_1_2,VK_KHR_8bit_storage"/>
+        </spirvcapability>
+        <spirvcapability name="StoragePushConstant8">
+            <enable struct="VkPhysicalDeviceVulkan12Features" feature="storagePushConstant8" requires="VK_VERSION_1_2,VK_KHR_8bit_storage"/>
+        </spirvcapability>
+        <spirvcapability name="VulkanMemoryModel">
+            <enable struct="VkPhysicalDeviceVulkan12Features" feature="vulkanMemoryModel" requires="VK_VERSION_1_2,VK_KHR_vulkan_memory_model"/>
+        </spirvcapability>
+        <spirvcapability name="VulkanMemoryModelDeviceScope">
+            <enable struct="VkPhysicalDeviceVulkan12Features" feature="vulkanMemoryModelDeviceScope" requires="VK_VERSION_1_2,VK_KHR_vulkan_memory_model"/>
+        </spirvcapability>
+        <spirvcapability name="DenormPreserve">
+            <enable property="VkPhysicalDeviceVulkan12Properties" member="shaderDenormPreserveFloat16" value="VK_TRUE" requires="VK_VERSION_1_2,VK_KHR_shader_float_controls"/>
+            <enable property="VkPhysicalDeviceVulkan12Properties" member="shaderDenormPreserveFloat32" value="VK_TRUE" requires="VK_VERSION_1_2,VK_KHR_shader_float_controls"/>
+            <enable property="VkPhysicalDeviceVulkan12Properties" member="shaderDenormPreserveFloat64" value="VK_TRUE" requires="VK_VERSION_1_2,VK_KHR_shader_float_controls"/>
+        </spirvcapability>
+        <spirvcapability name="DenormFlushToZero">
+            <enable property="VkPhysicalDeviceVulkan12Properties" member="shaderDenormFlushToZeroFloat16" value="VK_TRUE" requires="VK_VERSION_1_2,VK_KHR_shader_float_controls"/>
+            <enable property="VkPhysicalDeviceVulkan12Properties" member="shaderDenormFlushToZeroFloat32" value="VK_TRUE" requires="VK_VERSION_1_2,VK_KHR_shader_float_controls"/>
+            <enable property="VkPhysicalDeviceVulkan12Properties" member="shaderDenormFlushToZeroFloat64" value="VK_TRUE" requires="VK_VERSION_1_2,VK_KHR_shader_float_controls"/>
+        </spirvcapability>
+        <spirvcapability name="SignedZeroInfNanPreserve">
+            <enable property="VkPhysicalDeviceVulkan12Properties" member="shaderSignedZeroInfNanPreserveFloat16" value="VK_TRUE" requires="VK_VERSION_1_2,VK_KHR_shader_float_controls"/>
+            <enable property="VkPhysicalDeviceVulkan12Properties" member="shaderSignedZeroInfNanPreserveFloat32" value="VK_TRUE" requires="VK_VERSION_1_2,VK_KHR_shader_float_controls"/>
+            <enable property="VkPhysicalDeviceVulkan12Properties" member="shaderSignedZeroInfNanPreserveFloat64" value="VK_TRUE" requires="VK_VERSION_1_2,VK_KHR_shader_float_controls"/>
+        </spirvcapability>
+        <spirvcapability name="RoundingModeRTE">
+            <enable property="VkPhysicalDeviceVulkan12Properties" member="shaderRoundingModeRTEFloat16" value="VK_TRUE" requires="VK_VERSION_1_2,VK_KHR_shader_float_controls"/>
+            <enable property="VkPhysicalDeviceVulkan12Properties" member="shaderRoundingModeRTEFloat32" value="VK_TRUE" requires="VK_VERSION_1_2,VK_KHR_shader_float_controls"/>
+            <enable property="VkPhysicalDeviceVulkan12Properties" member="shaderRoundingModeRTEFloat64" value="VK_TRUE" requires="VK_VERSION_1_2,VK_KHR_shader_float_controls"/>
+        </spirvcapability>
+        <spirvcapability name="RoundingModeRTZ">
+            <enable property="VkPhysicalDeviceVulkan12Properties" member="shaderRoundingModeRTZFloat16" value="VK_TRUE" requires="VK_VERSION_1_2,VK_KHR_shader_float_controls"/>
+            <enable property="VkPhysicalDeviceVulkan12Properties" member="shaderRoundingModeRTZFloat32" value="VK_TRUE" requires="VK_VERSION_1_2,VK_KHR_shader_float_controls"/>
+            <enable property="VkPhysicalDeviceVulkan12Properties" member="shaderRoundingModeRTZFloat64" value="VK_TRUE" requires="VK_VERSION_1_2,VK_KHR_shader_float_controls"/>
+        </spirvcapability>
+        <spirvcapability name="ComputeDerivativeGroupQuadsNV">
+            <enable struct="VkPhysicalDeviceComputeShaderDerivativesFeaturesNV" feature="computeDerivativeGroupQuads" requires="VK_NV_compute_shader_derivatives"/>
+        </spirvcapability>
+        <spirvcapability name="ComputeDerivativeGroupLinearNV">
+            <enable struct="VkPhysicalDeviceComputeShaderDerivativesFeaturesNV" feature="computeDerivativeGroupLinear" requires="VK_NV_compute_shader_derivatives"/>
+        </spirvcapability>
+        <spirvcapability name="FragmentBarycentricNV">
+            <enable struct="VkPhysicalDeviceFragmentShaderBarycentricFeaturesNV" feature="fragmentShaderBarycentric" requires="VK_NV_fragment_shader_barycentric"/>
+        </spirvcapability>
+        <spirvcapability name="ImageFootprintNV">
+            <enable struct="VkPhysicalDeviceShaderImageFootprintFeaturesNV" feature="imageFootprint" requires="VK_NV_shader_image_footprint"/>
+        </spirvcapability>
+        <spirvcapability name="ShadingRateNV">
+            <enable struct="VkPhysicalDeviceShadingRateImageFeaturesNV" feature="shadingRateImage" requires="VK_NV_shading_rate_image"/>
+        </spirvcapability>
+        <spirvcapability name="MeshShadingNV">
+            <enable extension="VK_NV_mesh_shader"/>
+        </spirvcapability>
+        <spirvcapability name="RayTracingKHR">
+            <enable struct="VkPhysicalDeviceRayTracingPipelineFeaturesKHR" feature="rayTracingPipeline" requires="VK_KHR_ray_tracing_pipeline"/>
+        </spirvcapability>
+        <spirvcapability name="RayQueryKHR">
+            <enable struct="VkPhysicalDeviceRayQueryFeaturesKHR" feature="rayQuery" requires="VK_KHR_ray_query"/>
+        </spirvcapability>
+        <spirvcapability name="RayTraversalPrimitiveCullingKHR">
+            <enable struct="VkPhysicalDeviceRayTracingPipelineFeaturesKHR" feature="rayTraversalPrimitiveCulling" requires="VK_KHR_ray_tracing_pipeline"/>
+        </spirvcapability>
+        <spirvcapability name="RayTracingNV">
+            <enable extension="VK_NV_ray_tracing"/>
+        </spirvcapability>
+        <spirvcapability name="TransformFeedback">
+            <enable struct="VkPhysicalDeviceTransformFeedbackFeaturesEXT" feature="transformFeedback" requires="VK_EXT_transform_feedback"/>
+        </spirvcapability>
+        <spirvcapability name="GeometryStreams">
+            <enable struct="VkPhysicalDeviceTransformFeedbackFeaturesEXT" feature="geometryStreams" requires="VK_EXT_transform_feedback"/>
+        </spirvcapability>
+        <spirvcapability name="FragmentDensityEXT">
+            <enable struct="VkPhysicalDeviceFragmentDensityMapFeaturesEXT" feature="fragmentDensityMap" requires="VK_EXT_fragment_density_map"/>
+        </spirvcapability>
+        <spirvcapability name="PhysicalStorageBufferAddresses">
+            <enable struct="VkPhysicalDeviceVulkan12Features" feature="bufferDeviceAddress" requires="VK_VERSION_1_2,VK_KHR_buffer_device_address"/>
+            <enable struct="VkPhysicalDeviceBufferDeviceAddressFeaturesEXT" feature="bufferDeviceAddress" requires="VK_EXT_buffer_device_address" alias="bufferDeviceAddressEXT"/>
+        </spirvcapability>
+        <spirvcapability name="CooperativeMatrixNV">
+            <enable struct="VkPhysicalDeviceCooperativeMatrixFeaturesNV" feature="cooperativeMatrix" requires="VK_NV_cooperative_matrix"/>
+        </spirvcapability>
+        <spirvcapability name="IntegerFunctions2INTEL">
+            <enable struct="VkPhysicalDeviceShaderIntegerFunctions2FeaturesINTEL" feature="shaderIntegerFunctions2" requires="VK_INTEL_shader_integer_functions2"/>
+        </spirvcapability>
+        <spirvcapability name="ShaderSMBuiltinsNV">
+            <enable struct="VkPhysicalDeviceShaderSMBuiltinsFeaturesNV" feature="shaderSMBuiltins" requires="VK_NV_shader_sm_builtins"/>
+        </spirvcapability>
+        <spirvcapability name="FragmentShaderSampleInterlockEXT">
+            <enable struct="VkPhysicalDeviceFragmentShaderInterlockFeaturesEXT" feature="fragmentShaderSampleInterlock" requires="VK_EXT_fragment_shader_interlock"/>
+        </spirvcapability>
+        <spirvcapability name="FragmentShaderPixelInterlockEXT">
+            <enable struct="VkPhysicalDeviceFragmentShaderInterlockFeaturesEXT" feature="fragmentShaderPixelInterlock" requires="VK_EXT_fragment_shader_interlock"/>
+        </spirvcapability>
+        <spirvcapability name="FragmentShaderShadingRateInterlockEXT">
+            <enable struct="VkPhysicalDeviceFragmentShaderInterlockFeaturesEXT" feature="fragmentShaderShadingRateInterlock" requires="VK_EXT_fragment_shader_interlock"/>
+            <enable struct="VkPhysicalDeviceShadingRateImageFeaturesNV" feature="shadingRateImage" requires="VK_NV_shading_rate_image"/>
+        </spirvcapability>
+        <spirvcapability name="DemoteToHelperInvocationEXT">
+            <enable struct="VkPhysicalDeviceShaderDemoteToHelperInvocationFeaturesEXT" feature="shaderDemoteToHelperInvocation" requires="VK_EXT_shader_demote_to_helper_invocation"/>
+        </spirvcapability>
+        <spirvcapability name="FragmentShadingRateKHR">
+            <enable struct="VkPhysicalDeviceFragmentShadingRateFeaturesKHR" feature="pipelineFragmentShadingRate" requires="VK_KHR_fragment_shading_rate"/>
+            <enable struct="VkPhysicalDeviceFragmentShadingRateFeaturesKHR" feature="primitiveFragmentShadingRate" requires="VK_KHR_fragment_shading_rate"/>
+            <enable struct="VkPhysicalDeviceFragmentShadingRateFeaturesKHR" feature="attachmentFragmentShadingRate" requires="VK_KHR_fragment_shading_rate"/>
+        </spirvcapability>
+    </spirvcapabilities>
 </registry>