[json] support meta-schema features

Issue Type: Bug

So basically I have a VS Code extension that provides JSON file validation based on the built in JSON validator. The schema that I’m validating against (OpenAPI 3.1.x) uses meta-schema features, i.e. $dynamicRef, which I also need to use, since I reference the OpenAPI schema.

When defining a custom schema like the following, I get a warning stating that the validator doesn’t support meta-schema features yet. Needless to say, validation does really not work. When using normal $ref, most of the schema work but not properties that use $dynamicRef. So I’m forced to reference the schema by $dynamicRef as well.

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "OpenApiPathObject",
  "type": "object",
  "additionalProperties": {
    "$dynamicRef": "https://raw.githubusercontent.com/OAI/OpenAPI-Specification/main/schemas/v3.1/schema.json#/$defs/path-item-or-reference"
  }
}

The schema uses meta-schema features ($dynamicRef) that are not yet supported by the validator.

I’m using VS Code 1.69.0 and changed the required engine of my extension to ^1.68.0, which should include support for schema verion Draft 2020-12 as stated in the May 2022 release notes. What are my options here and how can I come around this warning?

Here’s an excerpt of the extension package.json

...
"engines": {
    "vscode": "^1.68.0"
},
...

VS Code version: Code 1.69.0 (92d25e35d9bf1a6b16f7d0758f25d48ace11e5b9, 2022-07-07T05:28:36.503Z) OS version: Windows_NT x64 10.0.22000 Restricted Mode: No Remote OS version: Linux x64 5.10.102.1-microsoft-standard-WSL2

System Info

Item	Value
CPUs	AMD Ryzen 5 2600X Six-Core Processor (12 x 3593)
GPU Status	2d_canvas: enabled canvas_oop_rasterization: disabled_off direct_rendering_display_compositor: disabled_off_ok gpu_compositing: enabled multiple_raster_threads: enabled_on opengl: enabled_on rasterization: enabled raw_draw: disabled_off_ok skia_renderer: enabled_on video_decode: enabled video_encode: enabled vulkan: disabled_off webgl: enabled webgl2: enabled
Load (avg)	undefined
Memory (System)	15.93GB (4.25GB free)
Process Argv	–crash-reporter-id 807faa54-048f-4bca-b099-f3700536fcc8
Screen Reader	no
VM	0%

Item	Value
Remote	WSL: Ubuntu
OS	Linux x64 5.10.102.1-microsoft-standard-WSL2
CPUs	AMD Ryzen 5 2600X Six-Core Processor (12 x 3593)
Memory (System)	7.73GB (4.17GB free)
VM	0%

Extensions (72)

Extension	Author (truncated)	Version
better-comments	aar	3.0.0
project-manager	ale	12.6.0
es7-react-js-snippets	dsz	4.4.3
lex-flex-yacc-bison	fau	0.0.3
auto-rename-tag	for	0.1.10
remotehub	Git	0.36.0
better-cpp-syntax	jef	1.15.19
jupyter-keymap	ms-	1.0.0
remote-ssh-edit	ms-	0.80.0
remote-wsl	ms-	0.66.3
remote-repositories	ms-	0.14.0
vscode-openapi	42C	4.11.3
vscode-css-formatter	aes	1.0.2
turbo-console-log	Cha	2.3.2
npm-intellisense	chr	1.4.2
path-intellisense	chr	2.8.1
doxdocgen	csc	1.4.0
vscode-svgviewer	css	2.0.0
vscode-markdownlint	Dav	0.47.0
vscode-eslint	dba	2.2.6
githistory	don	0.6.19
vscode-generate-getter-setter	DSK	0.5.0
gitlens	eam	12.1.2
prettier-vscode	esb	9.5.0
shell-format	fox	7.2.2
c-cpp-runner	fra	4.0.3
copilot	Git	1.31.6194
vscode-pull-request-github	Git	0.46.0
latex-workshop	Jam	8.27.2
better-cpp-syntax	jef	1.15.19
vscode-github-actions	me-	3.0.1
vscode-todo-parser	min	1.9.1
csharp	ms-	1.25.0
python	ms-	2022.10.1
vscode-pylance	ms-	2022.7.30
jupyter	ms-	2022.6.1201981810
jupyter-keymap	ms-	1.0.0
jupyter-renderers	ms-	1.0.8
cmake-tools	ms-	1.11.26
cpptools	ms-	1.10.8
cpptools-extension-pack	ms-	1.2.0
gradle-language	nac	0.2.3
color-highlight	nau	2.5.0
vscode-jest	Ort	4.6.0
peggy-language	Peg	2.3.0
vscode-boot-dev-pack	Piv	0.1.0
vscode-spring-boot	Piv	1.36.0
openapi-snippets	pro	0.0.9
quicktype	qui	12.0.46
typescript-hero	rbb	3.0.0
java	red	1.8.0
vscode-commons	red	0.0.6
vscode-xml	red	0.21.0
vscode-yaml	red	1.9.1
vscode-gradle-extension-pack	ric	0.0.4
LiveServer	rit	5.7.5
rust-analyzer	rus	0.3.1123
sonarlint-vscode	Son	3.7.0
svelte-vscode	sve	105.18.1
cmake	twx	0.0.17
vscode-lldb	vad	1.7.1
vscode-ltex	val	13.1.0
vscodeintellicode	Vis	1.2.22
vscode-gradle	vsc	3.12.2
vscode-java-debug	vsc	0.42.0
vscode-java-dependency	vsc	0.20.0
vscode-java-pack	vsc	0.24.0
vscode-java-test	vsc	0.35.2
vscode-maven	vsc	0.36.0
vscode-spring-boot-dashboard	vsc	0.5.0
vscode-spring-initializr	vsc	0.10.0
glean	wix	5.2.2

(2 theme extensions excluded)

[proohit]

@JustinGrote Using the spec, which uses $dynamicRef, could lead to unintended behaviour or not work at all, so suppressing the warning wouldn’t be a good idea imho.

[JustinGrote]

@aeschli oh, fair point, maybe filter these notices when you’re referencing the actual schema spec? 😃