does gltf support metadata， KV string map for example

[cmingxu]

I want store some metadata on a gltf, anyway i can store these data in it ?

[javagl]

There is the KHR_xmp_json_ld extension that allows storing metadata.

(On a more fine-grained level, there is a PR for structural metadata, but this is not reviewed/merged yet. Also, for some cases, when the data is only supposed to be used internally, then you can theoretically store arbitrary data in the extras property of nearly every object in glTF)

[javagl]

I'll just close this as a cleanup, assuming that it is answered sufficiently.