diff --git a/docs/dawn/codegen.md b/docs/dawn/codegen.md
index 47702db..a81ce9f 100644
--- a/docs/dawn/codegen.md
+++ b/docs/dawn/codegen.md
@@ -37,6 +37,8 @@
 
 Most items and sub-items can include a list of `"tags"`, which, if specified, conditionally includes the item if any of its tags appears in the `enabled_tags` configuration passed to `parse_json`. This is used to include and exclude various items for Dawn, Emscripten, or upstream header variants. Tags are applied in the "parse_json" step ([rather than later](https://docs.google.com/document/d/1fBniVOxx3-hQbxHMugEPcQsaXaKBZYVO8yG9iXJp-fU/edit?usp=sharing)): this has the benefit of automatically catching when, for a particular tag configuration, an included item references an excluded item.
 
+When used on enum values, `"tags"` may add an additional prefix to the enum value. This is to implement [implementation-specific ranges of enums](https://github.com/webgpu-native/webgpu-headers/issues/214). All compat enums are to start at `0x0002_0000`, Emscripten enums are to start at `0x0004_0000`, and all Dawn enums are to start at `0x0005_0000`. Use of `"compat"`, `"emscripten"`, or `"dawn"` tags will add these values, respectively. So, an enum with value `"3"` but tag `"emscripten"` will actually use value `0x0002_0003`. Multi-implementation native enums start at `0x0001_0000`, so this value is added if the `"native"` tag is present and no other value-impacting tag is applied.
+
 A **record** is a list of **record members**, each of which is a dictionary with the following schema:
  - `"name"` a string
  - `"type"` a string, the name of the base type for this member
diff --git a/generator/dawn_json_generator.py b/generator/dawn_json_generator.py
index e81d444..cfd3009 100644
--- a/generator/dawn_json_generator.py
+++ b/generator/dawn_json_generator.py
@@ -123,15 +123,35 @@
             if not is_enabled(m):
                 continue
             value = m['value']
-            name = m['name']
-            if name == "undefined":
+            value_name = m['name']
+            tags = m.get('tags', [])
+
+            prefix = 0
+            if 'compat' in tags:
+                assert prefix == 0
+                prefix = 0x0002_0000
+
+            if 'emscripten' in tags:
+                assert prefix == 0
+                prefix = 0x0004_0000
+
+            if 'dawn' in tags:
+                assert prefix == 0
+                prefix = 0x0005_0000
+
+            if prefix == 0 and 'native' in tags:
+                prefix = 0x0001_0000
+
+            value += prefix
+
+            if value_name == "undefined":
                 assert value == 0
                 self.hasUndefined = True
             if value != lastValue + 1:
                 self.contiguousFromZero = False
             lastValue = value
             self.values.append(
-                EnumValue(Name(name), value, m.get('valid', True), m))
+                EnumValue(Name(value_name), value, m.get('valid', True), m))
 
         # Assert that all values are unique in enums
         all_values = set()
@@ -1181,8 +1201,9 @@
 
         renders = []
 
-        params_dawn = parse_json(loaded_json,
-                                 enabled_tags=['dawn', 'native', 'deprecated'])
+        params_dawn = parse_json(
+            loaded_json,
+            enabled_tags=['compat', 'dawn', 'native', 'deprecated'])
         metadata = params_dawn['metadata']
         RENDER_PARAMS_BASE = make_base_render_params(metadata)
 
@@ -1246,17 +1267,18 @@
                            [RENDER_PARAMS_BASE, params_dawn]))
 
         if 'webgpu_headers' in targets:
-            params_upstream = parse_json(loaded_json,
-                                         enabled_tags=['upstream', 'native'],
-                                         disabled_tags=['dawn'])
+            params_upstream = parse_json(
+                loaded_json,
+                enabled_tags=['compat', 'upstream', 'native'],
+                disabled_tags=['dawn'])
             renders.append(
                 FileRender('api.h', 'webgpu-headers/' + api + '.h',
                            [RENDER_PARAMS_BASE, params_upstream]))
 
         if 'emscripten_bits' in targets:
             assert api == 'webgpu'
-            params_emscripten = parse_json(loaded_json,
-                                           enabled_tags=['emscripten'])
+            params_emscripten = parse_json(
+                loaded_json, enabled_tags=['compat', 'emscripten'])
             # system/include/webgpu
             renders.append(
                 FileRender('api.h',
@@ -1376,9 +1398,10 @@
                            frontend_params))
 
         if 'wire' in targets:
-            params_dawn_wire = parse_json(loaded_json,
-                                          enabled_tags=['dawn', 'deprecated'],
-                                          disabled_tags=['native'])
+            params_dawn_wire = parse_json(
+                loaded_json,
+                enabled_tags=['compat', 'dawn', 'deprecated'],
+                disabled_tags=['native'])
             additional_params = compute_wire_params(params_dawn_wire,
                                                     wire_json)
 
@@ -1444,9 +1467,10 @@
 
 
         if 'dawn_lpmfuzz_proto' in targets:
-            params_dawn_wire = parse_json(loaded_json,
-                                          enabled_tags=['dawn', 'deprecated'],
-                                          disabled_tags=['native'])
+            params_dawn_wire = parse_json(
+                loaded_json,
+                enabled_tags=['compat', 'dawn', 'deprecated'],
+                disabled_tags=['native'])
             api_and_wire_params = compute_wire_params(params_dawn_wire,
                                                       wire_json)
 
@@ -1472,9 +1496,10 @@
                     lpm_params))
 
         if 'dawn_lpmfuzz_cpp' in targets:
-            params_dawn_wire = parse_json(loaded_json,
-                                          enabled_tags=['dawn', 'deprecated'],
-                                          disabled_tags=['native'])
+            params_dawn_wire = parse_json(
+                loaded_json,
+                enabled_tags=['compat', 'dawn', 'deprecated'],
+                disabled_tags=['native'])
             api_and_wire_params = compute_wire_params(params_dawn_wire,
                                                       wire_json)
 
diff --git a/src/dawn/dawn.json b/src/dawn/dawn.json
index 93c5501..e9f8f0e 100644
--- a/src/dawn/dawn.json
+++ b/src/dawn/dawn.json
@@ -2443,62 +2443,62 @@
             {"value": 10, "name": "BGRA8 unorm storage"},
             {"value": 11, "name": "float32 filterable", "jsrepr": "'float32-filterable'"},
 
-            {"value": 1002, "name": "dawn internal usages", "tags": ["dawn"]},
-            {"value": 1003, "name": "dawn multi planar formats", "tags": ["dawn"]},
-            {"value": 1004, "name": "dawn native", "tags": ["dawn", "native"]},
-            {"value": 1006, "name": "chromium experimental timestamp query inside passes", "tags": ["dawn"]},
-            {"value": 1007, "name": "implicit device synchronization", "tags": ["dawn", "native"]},
-            {"value": 1008, "name": "surface capabilities", "tags": ["dawn", "native"]},
-            {"value": 1009, "name": "transient attachments", "tags": ["dawn"]},
-            {"value": 1010, "name": "MSAA render to single sampled", "tags": ["dawn"]},
-            {"value": 1011, "name": "dual source blending", "tags": ["dawn"]},
-            {"value": 1012, "name": "D3D11 multithread protected", "tags": ["dawn", "native"]},
-            {"value": 1013, "name": "ANGLE texture sharing", "tags": ["dawn", "native"]},
-            {"value": 1014, "name": "chromium experimental subgroups", "tags": ["dawn"]},
-            {"value": 1015, "name": "chromium experimental subgroup uniform control flow", "tags": ["dawn"]},
-            {"value": 1017, "name": "pixel local storage coherent", "tags": ["dawn"]},
-            {"value": 1018, "name": "pixel local storage non coherent", "tags": ["dawn"]},
-            {"value": 1019, "name": "unorm16 texture formats", "tags": ["dawn"]},
-            {"value": 1020, "name": "snorm16 texture formats", "tags": ["dawn"]},
-            {"value": 1021, "name": "multi planar format extended usages", "tags": ["dawn"]},
-            {"value": 1022, "name": "multi planar format p010", "tags": ["dawn"]},
-            {"value": 1023, "name": "host mapped pointer", "tags": ["dawn"]},
-            {"value": 1024, "name": "multi planar render targets", "tags": ["dawn"]},
-            {"value": 1025, "name": "multi planar format nv12a", "tags": ["dawn"]},
-            {"value": 1026, "name": "framebuffer fetch", "tags": ["dawn"]},
-            {"value": 1027, "name": "buffer map extended usages", "tags": ["dawn"]},
-            {"value": 1028, "name": "adapter properties memory heaps", "tags": ["dawn"]},
-            {"value": 1029, "name": "adapter properties D3D", "tags": ["dawn"]},
-            {"value": 1030, "name": "adapter properties vk", "tags": ["dawn"]},
-            {"value": 1031, "name": "r8 unorm storage", "tags": ["dawn"]},
-            {"value": 1032, "name": "format capabilities", "tags": ["dawn"]},
-            {"value": 1033, "name": "drm format capabilities", "tags": ["dawn"]},
-            {"value": 1034, "name": "norm16 texture formats", "tags": ["dawn"]},
-            {"value": 1035, "name": "multi planar format nv16", "tags": ["dawn"]},
-            {"value": 1036, "name": "multi planar format nv24", "tags": ["dawn"]},
-            {"value": 1037, "name": "multi planar format p210", "tags": ["dawn"]},
-            {"value": 1038, "name": "multi planar format p410", "tags": ["dawn"]},
+            {"value": 0, "name": "dawn internal usages", "tags": ["dawn"]},
+            {"value": 1, "name": "dawn multi planar formats", "tags": ["dawn"]},
+            {"value": 2, "name": "dawn native", "tags": ["dawn", "native"]},
+            {"value": 3, "name": "chromium experimental timestamp query inside passes", "tags": ["dawn"]},
+            {"value": 4, "name": "implicit device synchronization", "tags": ["dawn", "native"]},
+            {"value": 5, "name": "surface capabilities", "tags": ["dawn", "native"]},
+            {"value": 6, "name": "transient attachments", "tags": ["dawn"]},
+            {"value": 7, "name": "MSAA render to single sampled", "tags": ["dawn"]},
+            {"value": 8, "name": "dual source blending", "tags": ["dawn"]},
+            {"value": 9, "name": "D3D11 multithread protected", "tags": ["dawn", "native"]},
+            {"value": 10, "name": "ANGLE texture sharing", "tags": ["dawn", "native"]},
+            {"value": 11, "name": "chromium experimental subgroups", "tags": ["dawn"]},
+            {"value": 12, "name": "chromium experimental subgroup uniform control flow", "tags": ["dawn"]},
+            {"value": 13, "name": "pixel local storage coherent", "tags": ["dawn"]},
+            {"value": 14, "name": "pixel local storage non coherent", "tags": ["dawn"]},
+            {"value": 15, "name": "unorm16 texture formats", "tags": ["dawn"]},
+            {"value": 16, "name": "snorm16 texture formats", "tags": ["dawn"]},
+            {"value": 17, "name": "multi planar format extended usages", "tags": ["dawn"]},
+            {"value": 18, "name": "multi planar format p010", "tags": ["dawn"]},
+            {"value": 19, "name": "host mapped pointer", "tags": ["dawn"]},
+            {"value": 20, "name": "multi planar render targets", "tags": ["dawn"]},
+            {"value": 21, "name": "multi planar format nv12a", "tags": ["dawn"]},
+            {"value": 22, "name": "framebuffer fetch", "tags": ["dawn"]},
+            {"value": 23, "name": "buffer map extended usages", "tags": ["dawn"]},
+            {"value": 24, "name": "adapter properties memory heaps", "tags": ["dawn"]},
+            {"value": 25, "name": "adapter properties D3D", "tags": ["dawn"]},
+            {"value": 26, "name": "adapter properties vk", "tags": ["dawn"]},
+            {"value": 27, "name": "r8 unorm storage", "tags": ["dawn"]},
+            {"value": 28, "name": "format capabilities", "tags": ["dawn"]},
+            {"value": 29, "name": "drm format capabilities", "tags": ["dawn"]},
+            {"value": 30, "name": "norm16 texture formats", "tags": ["dawn"]},
+            {"value": 31, "name": "multi planar format nv16", "tags": ["dawn"]},
+            {"value": 32, "name": "multi planar format nv24", "tags": ["dawn"]},
+            {"value": 33, "name": "multi planar format p210", "tags": ["dawn"]},
+            {"value": 34, "name": "multi planar format p410", "tags": ["dawn"]},
 
-            {"value": 1100, "name": "shared texture memory vk dedicated allocation", "tags": ["dawn", "native"]},
-            {"value": 1101, "name": "shared texture memory a hardware buffer", "tags": ["dawn", "native"]},
-            {"value": 1102, "name": "shared texture memory dma buf", "tags": ["dawn", "native"]},
-            {"value": 1103, "name": "shared texture memory opaque FD", "tags": ["dawn", "native"]},
-            {"value": 1104, "name": "shared texture memory zircon handle", "tags": ["dawn", "native"]},
-            {"value": 1105, "name": "shared texture memory DXGI shared handle", "tags": ["dawn", "native"]},
-            {"value": 1106, "name": "shared texture memory D3D11 texture 2D", "tags": ["dawn", "native"]},
-            {"value": 1107, "name": "shared texture memory IO surface", "tags": ["dawn", "native"]},
-            {"value": 1108, "name": "shared texture memory EGL image", "tags": ["dawn", "native"]},
-            {"value": 1200, "name": "shared fence vk semaphore opaque FD", "tags": ["dawn", "native"]},
-            {"value": 1201, "name": "shared fence vk semaphore sync FD", "tags": ["dawn", "native"]},
-            {"value": 1202, "name": "shared fence vk semaphore zircon handle", "tags": ["dawn", "native"]},
-            {"value": 1203, "name": "shared fence DXGI shared handle", "tags": ["dawn", "native"]},
-            {"value": 1204, "name": "shared fence MTL shared event", "tags": ["dawn", "native"]},
-            {"value": 1205, "name": "shared buffer memory D3D12 resource", "tags": ["dawn", "native"]},
-            {"value": 1206, "name": "static samplers", "tags": ["dawn"]},
-            {"value": 1207, "name": "y cb cr vulkan samplers", "tags": ["dawn"]},
-            {"value": 1208, "name": "shader module compilation options", "tags": ["dawn"]},
+            {"value": 35, "name": "shared texture memory vk dedicated allocation", "tags": ["dawn", "native"]},
+            {"value": 36, "name": "shared texture memory a hardware buffer", "tags": ["dawn", "native"]},
+            {"value": 37, "name": "shared texture memory dma buf", "tags": ["dawn", "native"]},
+            {"value": 38, "name": "shared texture memory opaque FD", "tags": ["dawn", "native"]},
+            {"value": 39, "name": "shared texture memory zircon handle", "tags": ["dawn", "native"]},
+            {"value": 40, "name": "shared texture memory DXGI shared handle", "tags": ["dawn", "native"]},
+            {"value": 41, "name": "shared texture memory D3D11 texture 2D", "tags": ["dawn", "native"]},
+            {"value": 42, "name": "shared texture memory IO surface", "tags": ["dawn", "native"]},
+            {"value": 43, "name": "shared texture memory EGL image", "tags": ["dawn", "native"]},
+            {"value": 44, "name": "shared fence vk semaphore opaque FD", "tags": ["dawn", "native"]},
+            {"value": 45, "name": "shared fence vk semaphore sync FD", "tags": ["dawn", "native"]},
+            {"value": 46, "name": "shared fence vk semaphore zircon handle", "tags": ["dawn", "native"]},
+            {"value": 47, "name": "shared fence DXGI shared handle", "tags": ["dawn", "native"]},
+            {"value": 48, "name": "shared fence MTL shared event", "tags": ["dawn", "native"]},
+            {"value": 49, "name": "shared buffer memory D3D12 resource", "tags": ["dawn", "native"]},
+            {"value": 50, "name": "static samplers", "tags": ["dawn"]},
+            {"value": 51, "name": "y cb cr vulkan samplers", "tags": ["dawn"]},
+            {"value": 52, "name": "shader module compilation options", "tags": ["dawn"]},
 
-            {"value": 1209, "name": "dawn load resolve texture", "tags": ["dawn"]}
+            {"value": 53, "name": "dawn load resolve texture", "tags": ["dawn"]}
         ]
     },
     "filter mode": {
@@ -3966,68 +3966,70 @@
             {"value": 8, "name": "surface descriptor from wayland surface", "tags": ["native"]},
             {"value": 9, "name": "surface descriptor from android native window", "tags": ["native"]},
             {"value": 10, "name": "surface descriptor from xcb window", "tags": ["upstream"]},
-            {"value": 11, "name": "surface descriptor from windows core window", "tags": ["dawn"]},
-            {"value": 12, "name": "external texture binding entry", "tags": ["dawn"]},
-            {"value": 13, "name": "external texture binding layout", "tags": ["dawn"]},
-            {"value": 14, "name": "surface descriptor from windows swap chain panel", "tags": ["dawn"]},
-            {"value": 15, "name": "render pass descriptor max draw count"},
-            {"value": 16, "name": "depth stencil state depth write defined dawn", "tags": ["dawn"]},
-            {"value": 17, "name": "texture binding view dimension descriptor"},
-            {"value": 1000, "name": "dawn texture internal usage descriptor", "tags": ["dawn"]},
-            {"value": 1003, "name": "dawn encoder internal usage descriptor", "tags": ["dawn"]},
-            {"value": 1004, "name": "dawn instance descriptor", "tags": ["dawn", "native"]},
-            {"value": 1005, "name": "dawn cache device descriptor", "tags": ["dawn", "native"]},
-            {"value": 1006, "name": "dawn adapter properties power preference", "tags": ["dawn", "native"]},
-            {"value": 1007, "name": "dawn buffer descriptor error info from wire client", "tags": ["dawn"]},
-            {"value": 1008, "name": "dawn toggles descriptor", "tags": ["dawn", "native"]},
-            {"value": 1009, "name": "dawn shader module SPIRV options descriptor", "tags": ["dawn"]},
-            {"value": 1010, "name": "request adapter options LUID", "tags": ["dawn", "native"]},
-            {"value": 1011, "name": "request adapter options get GL proc", "tags": ["dawn", "native"]},
-            {"value": 1012, "name": "request adapter options D3D11 device", "tags": ["dawn", "native"]},
-            {"value": 1014, "name": "dawn render pass color attachment render to single sampled", "tags": ["dawn"]},
-            {"value": 1015, "name": "render pass pixel local storage", "tags": ["dawn"]},
-            {"value": 1016, "name": "pipeline layout pixel local storage", "tags": ["dawn"]},
-            {"value": 1017, "name": "buffer host mapped pointer", "tags": ["dawn"]},
-            {"value": 1018, "name": "dawn experimental subgroup limits", "tags": ["dawn"]},
-            {"value": 1019, "name": "adapter properties memory heaps", "tags": ["dawn"]},
-            {"value": 1020, "name": "adapter properties D3D", "tags": ["dawn"]},
-            {"value": 1021, "name": "adapter properties vk", "tags": ["dawn"]},
-            {"value": 1022, "name": "dawn compute pipeline full subgroups", "tags": ["dawn"]},
-            {"value": 1023, "name": "dawn wire WGSL control", "tags": ["dawn"]},
-            {"value": 1024, "name": "dawn WGSL blocklist", "tags": ["dawn", "native"]},
-            {"value": 1025, "name": "drm format capabilities", "tags": ["dawn"]},
-            {"value": 1026, "name": "shader module compilation options", "tags": ["dawn"]},
-            {"value": 1027, "name": "color target state expand resolve texture dawn", "tags": ["dawn"]},
+            {"value": 11, "name": "render pass descriptor max draw count"},
 
-            {"value": 1101, "name": "shared texture memory vk dedicated allocation descriptor", "tags": ["dawn", "native"]},
-            {"value": 1102, "name": "shared texture memory a hardware buffer descriptor", "tags": ["dawn", "native"]},
-            {"value": 1103, "name": "shared texture memory dma buf descriptor", "tags": ["dawn", "native"]},
-            {"value": 1104, "name": "shared texture memory opaque FD descriptor", "tags": ["dawn", "native"]},
-            {"value": 1105, "name": "shared texture memory zircon handle descriptor", "tags": ["dawn", "native"]},
-            {"value": 1106, "name": "shared texture memory DXGI shared handle descriptor", "tags": ["dawn", "native"]},
-            {"value": 1107, "name": "shared texture memory D3D11 texture 2D descriptor", "tags": ["dawn", "native"]},
-            {"value": 1108, "name": "shared texture memory IO surface descriptor", "tags": ["dawn", "native"]},
-            {"value": 1109, "name": "shared texture memory EGL image descriptor", "tags": ["dawn", "native"]},
-            {"value": 1200, "name": "shared texture memory initialized begin state", "tags": ["dawn", "native"]},
-            {"value": 1201, "name": "shared texture memory initialized end state", "tags": ["dawn", "native"]},
-            {"value": 1202, "name": "shared texture memory vk image layout begin state", "tags": ["dawn", "native"]},
-            {"value": 1203, "name": "shared texture memory vk image layout end state", "tags": ["dawn", "native"]},
-            {"value": 1204, "name": "shared texture memory D3D swapchain begin state", "tags": ["dawn", "native"]},
-            {"value": 1205, "name": "shared fence vk semaphore opaque FD descriptor", "tags": ["dawn", "native"]},
-            {"value": 1206, "name": "shared fence vk semaphore opaque FD export info", "tags": ["dawn", "native"]},
-            {"value": 1207, "name": "shared fence vk semaphore sync FD descriptor", "tags": ["dawn", "native"]},
-            {"value": 1208, "name": "shared fence vk semaphore sync FD export info", "tags": ["dawn", "native"]},
-            {"value": 1209, "name": "shared fence vk semaphore zircon handle descriptor", "tags": ["dawn", "native"]},
-            {"value": 1210, "name": "shared fence vk semaphore zircon handle export info", "tags": ["dawn", "native"]},
-            {"value": 1211, "name": "shared fence DXGI shared handle descriptor", "tags": ["dawn", "native"]},
-            {"value": 1212, "name": "shared fence DXGI shared handle export info", "tags": ["dawn", "native"]},
-            {"value": 1213, "name": "shared fence MTL shared event descriptor", "tags": ["dawn", "native"]},
-            {"value": 1214, "name": "shared fence MTL shared event export info", "tags": ["dawn", "native"]},
-            {"value": 1215, "name": "shared buffer memory D3D12 resource descriptor", "tags": ["dawn", "native"]},
-            {"value": 1216, "name": "static sampler binding layout", "tags": ["dawn"]},
-            {"value": 1217, "name": "y cb cr vk descriptor", "tags": ["dawn"]},
-            {"value": 1218, "name": "shared texture memory a hardware buffer properties", "tags": ["dawn", "native"]},
-            {"value": 1219, "name": "a hardware buffer properties", "tags": ["dawn", "native"]}
+            {"value": 0, "name": "texture binding view dimension descriptor", "tags": ["compat"]},
+
+            {"value": 0, "name": "surface descriptor from windows core window", "tags": ["dawn"]},
+            {"value": 1, "name": "external texture binding entry", "tags": ["dawn"]},
+            {"value": 2, "name": "external texture binding layout", "tags": ["dawn"]},
+            {"value": 3, "name": "surface descriptor from windows swap chain panel", "tags": ["dawn"]},
+            {"value": 4, "name": "depth stencil state depth write defined dawn", "tags": ["dawn"]},
+            {"value": 5, "name": "dawn texture internal usage descriptor", "tags": ["dawn"]},
+            {"value": 6, "name": "dawn encoder internal usage descriptor", "tags": ["dawn"]},
+            {"value": 7, "name": "dawn instance descriptor", "tags": ["dawn", "native"]},
+            {"value": 8, "name": "dawn cache device descriptor", "tags": ["dawn", "native"]},
+            {"value": 9, "name": "dawn adapter properties power preference", "tags": ["dawn", "native"]},
+            {"value": 10, "name": "dawn buffer descriptor error info from wire client", "tags": ["dawn"]},
+            {"value": 11, "name": "dawn toggles descriptor", "tags": ["dawn", "native"]},
+            {"value": 12, "name": "dawn shader module SPIRV options descriptor", "tags": ["dawn"]},
+            {"value": 13, "name": "request adapter options LUID", "tags": ["dawn", "native"]},
+            {"value": 14, "name": "request adapter options get GL proc", "tags": ["dawn", "native"]},
+            {"value": 15, "name": "request adapter options D3D11 device", "tags": ["dawn", "native"]},
+            {"value": 16, "name": "dawn render pass color attachment render to single sampled", "tags": ["dawn"]},
+            {"value": 17, "name": "render pass pixel local storage", "tags": ["dawn"]},
+            {"value": 18, "name": "pipeline layout pixel local storage", "tags": ["dawn"]},
+            {"value": 19, "name": "buffer host mapped pointer", "tags": ["dawn"]},
+            {"value": 20, "name": "dawn experimental subgroup limits", "tags": ["dawn"]},
+            {"value": 21, "name": "adapter properties memory heaps", "tags": ["dawn"]},
+            {"value": 22, "name": "adapter properties D3D", "tags": ["dawn"]},
+            {"value": 23, "name": "adapter properties vk", "tags": ["dawn"]},
+            {"value": 24, "name": "dawn compute pipeline full subgroups", "tags": ["dawn"]},
+            {"value": 25, "name": "dawn wire WGSL control", "tags": ["dawn"]},
+            {"value": 26, "name": "dawn WGSL blocklist", "tags": ["dawn", "native"]},
+            {"value": 27, "name": "drm format capabilities", "tags": ["dawn"]},
+            {"value": 28, "name": "shader module compilation options", "tags": ["dawn"]},
+            {"value": 29, "name": "color target state expand resolve texture dawn", "tags": ["dawn"]},
+
+            {"value": 30, "name": "shared texture memory vk dedicated allocation descriptor", "tags": ["dawn", "native"]},
+            {"value": 31, "name": "shared texture memory a hardware buffer descriptor", "tags": ["dawn", "native"]},
+            {"value": 32, "name": "shared texture memory dma buf descriptor", "tags": ["dawn", "native"]},
+            {"value": 33, "name": "shared texture memory opaque FD descriptor", "tags": ["dawn", "native"]},
+            {"value": 34, "name": "shared texture memory zircon handle descriptor", "tags": ["dawn", "native"]},
+            {"value": 35, "name": "shared texture memory DXGI shared handle descriptor", "tags": ["dawn", "native"]},
+            {"value": 36, "name": "shared texture memory D3D11 texture 2D descriptor", "tags": ["dawn", "native"]},
+            {"value": 37, "name": "shared texture memory IO surface descriptor", "tags": ["dawn", "native"]},
+            {"value": 38, "name": "shared texture memory EGL image descriptor", "tags": ["dawn", "native"]},
+            {"value": 39, "name": "shared texture memory initialized begin state", "tags": ["dawn", "native"]},
+            {"value": 40, "name": "shared texture memory initialized end state", "tags": ["dawn", "native"]},
+            {"value": 41, "name": "shared texture memory vk image layout begin state", "tags": ["dawn", "native"]},
+            {"value": 42, "name": "shared texture memory vk image layout end state", "tags": ["dawn", "native"]},
+            {"value": 43, "name": "shared texture memory D3D swapchain begin state", "tags": ["dawn", "native"]},
+            {"value": 44, "name": "shared fence vk semaphore opaque FD descriptor", "tags": ["dawn", "native"]},
+            {"value": 45, "name": "shared fence vk semaphore opaque FD export info", "tags": ["dawn", "native"]},
+            {"value": 46, "name": "shared fence vk semaphore sync FD descriptor", "tags": ["dawn", "native"]},
+            {"value": 47, "name": "shared fence vk semaphore sync FD export info", "tags": ["dawn", "native"]},
+            {"value": 48, "name": "shared fence vk semaphore zircon handle descriptor", "tags": ["dawn", "native"]},
+            {"value": 49, "name": "shared fence vk semaphore zircon handle export info", "tags": ["dawn", "native"]},
+            {"value": 50, "name": "shared fence DXGI shared handle descriptor", "tags": ["dawn", "native"]},
+            {"value": 51, "name": "shared fence DXGI shared handle export info", "tags": ["dawn", "native"]},
+            {"value": 52, "name": "shared fence MTL shared event descriptor", "tags": ["dawn", "native"]},
+            {"value": 53, "name": "shared fence MTL shared event export info", "tags": ["dawn", "native"]},
+            {"value": 54, "name": "shared buffer memory D3D12 resource descriptor", "tags": ["dawn", "native"]},
+            {"value": 55, "name": "static sampler binding layout", "tags": ["dawn"]},
+            {"value": 56, "name": "y cb cr vk descriptor", "tags": ["dawn"]},
+            {"value": 57, "name": "shared texture memory a hardware buffer properties", "tags": ["dawn", "native"]},
+            {"value": 58, "name": "a hardware buffer properties", "tags": ["dawn", "native"]}
         ]
     },
     "texture": {
@@ -4111,9 +4113,9 @@
             {"value": 1, "name": "all"},
             {"value": 2, "name": "stencil only"},
             {"value": 3, "name": "depth only"},
-            {"value": 4, "name": "plane 0 only", "tags": ["dawn"]},
-            {"value": 5, "name": "plane 1 only", "tags": ["dawn"]},
-            {"value": 6, "name": "plane 2 only", "tags": ["dawn"]}
+            {"value": 0, "name": "plane 0 only", "tags": ["dawn"]},
+            {"value": 1, "name": "plane 1 only", "tags": ["dawn"]},
+            {"value": 2, "name": "plane 2 only", "tags": ["dawn"]}
         ]
     },
     "texture data layout": {
@@ -4266,21 +4268,21 @@
             {"value": 94, "name": "ASTC 12x12 unorm",       "jsrepr": "'astc-12x12-unorm'"},
             {"value": 95, "name": "ASTC 12x12 unorm srgb",  "jsrepr": "'astc-12x12-unorm-srgb'"},
 
-            {"value": 96, "name": "R16 unorm", "tags": ["dawn"]},
-            {"value": 97, "name": "RG16 unorm", "tags": ["dawn"]},
-            {"value": 98, "name": "RGBA16 unorm", "tags": ["dawn"]},
-            {"value": 99, "name": "R16 snorm", "tags": ["dawn"]},
-            {"value": 100, "name": "RG16 snorm", "tags": ["dawn"]},
-            {"value": 101, "name": "RGBA16 snorm", "tags": ["dawn"]},
+            {"value": 0, "name": "R16 unorm", "tags": ["dawn"]},
+            {"value": 1, "name": "RG16 unorm", "tags": ["dawn"]},
+            {"value": 2, "name": "RGBA16 unorm", "tags": ["dawn"]},
+            {"value": 3, "name": "R16 snorm", "tags": ["dawn"]},
+            {"value": 4, "name": "RG16 snorm", "tags": ["dawn"]},
+            {"value": 5, "name": "RGBA16 snorm", "tags": ["dawn"]},
 
-            {"value": 102, "name": "R8 BG8 Biplanar 420 unorm", "tags": ["dawn"]},
-            {"value": 103, "name": "R10X6 BG10X6 Biplanar 420 unorm", "tags": ["dawn"]},
-            {"value": 104, "name": "R8 BG8 A8 Triplanar 420 unorm", "tags": ["dawn"]},
-            {"value": 105, "name": "R8 BG8 Biplanar 422 unorm", "tags": ["dawn"]},
-            {"value": 106, "name": "R8 BG8 Biplanar 444 unorm", "tags": ["dawn"]},
-            {"value": 107, "name": "R10X6 BG10X6 Biplanar 422 unorm", "tags": ["dawn"]},
-            {"value": 108, "name": "R10X6 BG10X6 Biplanar 444 unorm", "tags": ["dawn"]},
-            {"value": 109, "name": "External", "tags": ["dawn"]}
+            {"value": 6, "name": "R8 BG8 Biplanar 420 unorm", "tags": ["dawn"]},
+            {"value": 7, "name": "R10X6 BG10X6 Biplanar 420 unorm", "tags": ["dawn"]},
+            {"value": 8, "name": "R8 BG8 A8 Triplanar 420 unorm", "tags": ["dawn"]},
+            {"value": 9, "name": "R8 BG8 Biplanar 422 unorm", "tags": ["dawn"]},
+            {"value": 10, "name": "R8 BG8 Biplanar 444 unorm", "tags": ["dawn"]},
+            {"value": 11, "name": "R10X6 BG10X6 Biplanar 422 unorm", "tags": ["dawn"]},
+            {"value": 12, "name": "R10X6 BG10X6 Biplanar 444 unorm", "tags": ["dawn"]},
+            {"value": 13, "name": "External", "tags": ["dawn"]}
         ]
     },
     "texture usage": {
@@ -4397,11 +4399,12 @@
             {"value": 2, "name": "packed 4x8 integer dot product", "jsrepr": "'packed_4x8_integer_dot_product'"},
             {"value": 3, "name": "unrestricted pointer parameters", "jsrepr": "'unrestricted_pointer_parameters'"},
             {"value": 4, "name": "pointer composite access", "jsrepr": "'pointer_composite_access'"},
-            {"value": 1000, "name": "chromium testing unimplemented", "jsrepr": "'chromium_testing_unimplemented'", "tags": ["dawn"]},
-            {"value": 1001, "name": "chromium testing unsafe experimental", "jsrepr": "'chromium_testing_unsafe_experimental'", "tags": ["dawn"]},
-            {"value": 1002, "name": "chromium testing experimental", "jsrepr": "'chromium_testing_experimental'", "tags": ["dawn"]},
-            {"value": 1003, "name": "chromium testing shipped with killswitch", "jsrepr": "'chromium_testing_shipped_with_killswitch'", "tags": ["dawn"]},
-            {"value": 1004, "name": "chromium testing shipped", "jsrepr": "'chromium_testing_shipped'", "tags": ["dawn"]}
+
+            {"value": 0, "name": "chromium testing unimplemented", "jsrepr": "'chromium_testing_unimplemented'", "tags": ["dawn"]},
+            {"value": 1, "name": "chromium testing unsafe experimental", "jsrepr": "'chromium_testing_unsafe_experimental'", "tags": ["dawn"]},
+            {"value": 2, "name": "chromium testing experimental", "jsrepr": "'chromium_testing_experimental'", "tags": ["dawn"]},
+            {"value": 3, "name": "chromium testing shipped with killswitch", "jsrepr": "'chromium_testing_shipped_with_killswitch'", "tags": ["dawn"]},
+            {"value": 4, "name": "chromium testing shipped", "jsrepr": "'chromium_testing_shipped'", "tags": ["dawn"]}
         ]
     },
     "whole size" : {
diff --git a/src/dawn/native/Format.cpp b/src/dawn/native/Format.cpp
index 029f474..7a2492b 100644
--- a/src/dawn/native/Format.cpp
+++ b/src/dawn/native/Format.cpp
@@ -173,11 +173,29 @@
 
 // For the enum for formats are packed but this might change when we have a broader feature
 // mechanism for webgpu.h. Formats start at 1 because 0 is the undefined format.
+// Dawn internal formats start with a prefix. We strip the prefix and then pack
+// them after the last WebGPU format.
 FormatIndex ComputeFormatIndex(wgpu::TextureFormat format) {
-    // This takes advantage of overflows to make the index of TextureFormat::Undefined outside
-    // of the range of the FormatTable.
-    static_assert(static_cast<uint32_t>(wgpu::TextureFormat::Undefined) - 1 > kKnownFormatCount);
-    return static_cast<FormatIndex>(static_cast<uint32_t>(format) - 1);
+    uint32_t formatValue = static_cast<uint32_t>(format);
+    switch (formatValue & kEnumPrefixMask) {
+        case 0:
+            // This takes advantage of overflows to make the index of TextureFormat::Undefined
+            // outside of the range of the FormatTable.
+            static_assert(static_cast<uint32_t>(wgpu::TextureFormat::Undefined) - 1 >
+                          kKnownFormatCount);
+            return static_cast<FormatIndex>(formatValue - 1);
+        case kDawnEnumPrefix: {
+            uint32_t dawnIndex = formatValue & ~kEnumPrefixMask;
+            if (dawnIndex < kDawnFormatCount) {
+                return static_cast<FormatIndex>(dawnIndex + kWebGPUFormatCount);
+            }
+            break;
+        }
+        default:
+            break;
+    }
+    // Invalid format. Return an index outside the format table.
+    return FormatIndex(~0);
 }
 
 FormatTable BuildFormatTable(const DeviceBase* device) {
diff --git a/src/dawn/native/Format.h b/src/dawn/native/Format.h
index 3efb5b4..32218998 100644
--- a/src/dawn/native/Format.h
+++ b/src/dawn/native/Format.h
@@ -118,7 +118,9 @@
 
 // The number of formats Dawn knows about. Asserts in BuildFormatTable ensure that this is the
 // exact number of known format.
-static constexpr uint32_t kKnownFormatCount = 109;
+static constexpr uint32_t kWebGPUFormatCount = 95;
+static constexpr uint32_t kDawnFormatCount = 14;
+static constexpr uint32_t kKnownFormatCount = kWebGPUFormatCount + kDawnFormatCount;
 
 using FormatIndex = TypedInteger<struct FormatIndexT, uint32_t>;
 
diff --git a/src/dawn/native/dawn_platform.h b/src/dawn/native/dawn_platform.h
index 02406c4..1fe5e37 100644
--- a/src/dawn/native/dawn_platform.h
+++ b/src/dawn/native/dawn_platform.h
@@ -97,6 +97,10 @@
 // Extra TextureViewDimension for input attachment.
 static constexpr wgpu::TextureViewDimension kInternalInputAttachmentDim =
     static_cast<wgpu::TextureViewDimension>(~0u);
+
+static constexpr uint32_t kEnumPrefixMask = 0xFFFF'0000;
+static constexpr uint32_t kDawnEnumPrefix = 0x0005'0000;
+
 }  // namespace dawn::native
 
 #endif  // SRC_DAWN_NATIVE_DAWN_PLATFORM_H_