how to use schema.json to extend gltf

[chen21439]

[featureIdTexture.schema.json.](https://github.com/CesiumGS/glTF/tree/3d-tiles-next/extensions/2.0/Vendor/EXT_mesh_features)

for example in the document,it use shema.json to generate featureId for each vertex,i want to know waht software can do this ,can you give me more information

[javagl]

GitHub issues are not a forum. This is not an issue with the glTF specification. It is also not an issue with the glTF-Tutorials. I'll close this here, and write a little bit more at KhronosGroup/glTF-Tutorials#87