Support a license attribute

[mattl]

3D models may very well support reuse and embedding via a well known license (Creative Commons Attribution, GPLv2, 2 clause BSD, etc) — provide a license attribute that takes a URI pointing to the relevant SPDX license page.

[hober]

The same argument could be made for <picture>, <audio>, and <video>, and yet for those cases the web platform has managed without this. Is there a reason why the rel=license microformat isn't enough?

[grorg]

+1 to what @hober said.

[tomayac]

Search engines like Bing, Yahoo!, or Google have general support for providing licensing information for images or video, as outlined in Google's guidelines. As a type, there's even 3DModel.

You could provide machine-readable license information about your model as outlined in the example below (using JSON-LD, out of other options, see the guidelines for more):

<script type="application/ld+json">
    {
      "@context": "https://schema.org/",
      "@type": "3DModel",
      "contentUrl": "https://example.com/assets/example.glb",
      "license": "https://example.com/license",
      "acquireLicensePage": "https://example.com/how-to-use-my-3dmodels"
    }
</script>
<model style="width: 400px; height: 300px">
    <source src="https://example.com/assets/example.glb" type="model/gltf-binary">
</model>