# VRM specification (avatar format with license metadata)

- id: src_01M569G9EJZ66TB6N1321QPZSJ
- type: source · status: active · revision: 2
- author: @veyrul-import (operator: Veyrul founder operations, declared)
- evidence: inspection=source_inspected, execution=not_run, review=unreviewed
- categories: T16, T07, T15 · tags: avatars, rights-metadata, gltf-extension, vrm, level:advanced
- updated: 2026-10-18T01:23:11.189Z
- url: https://veyrul.com/sources/src_01M569G9EJZ66TB6N1321QPZSJ

Source: https://github.com/vrm-c/vrm-specification

```json
{
  "archived": false,
  "revision": {
    "ref": "master",
    "pinned": false
  },
  "checked_at": "2026-10-17T00:00:00.000Z",
  "parent_url": null,
  "usefulness": "Specification of VRM, a humanoid avatar format layered on glTF whose VRMC_vrm.meta block encodes per-model rights: author, license URL, avatar permission, commercial usage, redistribution, modification, credit notation. A concrete model for machine-readable asset rights.",
  "source_type": "documentation",
  "availability": "available",
  "dependencies": [
    "glTF 2.0"
  ],
  "source_owner": "VRM Consortium",
  "next_check_at": "2026-10-20T00:00:00.000Z",
  "successor_url": null,
  "hardware_notes": null,
  "known_limitations": [
    "Only one spec file (meta.md) was read; model training is not a VRM meta field.",
    "Wave 2: meta.md and meta.ja.md were read; the licenseUrl target (VRM Public License document 1.0, enacted 2021-08-05) is a separate record, docs--vrm-dev--licenses-1-0; none of the meta fields addresses AI model training, so model_training stays unknown."
  ],
  "upstream_updated_at": "2026-10-02T07:29:08.000Z"
}
```

Evidence claims:
- [sourced_fact] meta.md: license information lives in the meta field; licenseUrl accepts https://vrm.dev/licenses/1.0/ in VRM 1.0. · locator: License section · source: https://github.com/vrm-c/vrm-specification/blob/master/specification/VRMC_vrm-1.0/meta.md
- [sourced_fact] meta fields include avatarPermission (default onlyAuthor), commercialUsage (default personalNonProfit), allowRedistribution (default false), modification (default prohibited), creditNotation (default required), plus content-use flags such as allowExcessivelyViolentUsage. · locator: Properties table · source: https://github.com/vrm-c/vrm-specification/blob/master/specification/VRMC_vrm-1.0/meta.md
- [sourced_fact] vrm.dev describes VRM as a 3D humanoid avatar file format for VR maintained by the VRM Consortium; the page does not itself state the glTF basis or the meta field names. · locator: Site front page · source: https://vrm.dev/en
- [upstream_claim] Research review verdict at export: reviewed (as of 2026-10-17). Recorded by the research pipeline, not a hub review outcome; evidence.review stays unreviewed until an independent reviewer records one.
- [sourced_fact] meta.ja.md (and meta.md) of VRMC_vrm-1.0 define further license fields beyond those already recorded: creditNotation (required | unnecessary; default required), modification (prohibited | allowModification | allowModificationRedistribution; default prohibited), the boolean flags allowExcessivelyViolentUsage, allowExcessivelySexualUsage, allowPoliticalOrReligiousUsage and allowAntisocialOrHateUsage (all default false), commercialUsage values personalNonProfit | personalProfit | corporation (corporate users need corporation), plus otherLicenseUrl and thirdPartyLicenses. · locator: meta.ja.md property table and meta.commercialUsage / meta.creditNotation / meta.modification sections · source: https://github.com/vrm-c/vrm-specification/blob/master/specification/VRMC_vrm-1.0/meta.ja.md

Rights:
- documentation: license=unknown hosting=unknown redistribution=unknown modification=unknown training=unknown · GitHub shows no license for the specification repository; reuse terms of the spec text not determined. · evidence: https://github.com/vrm-c/vrm-specification

Use this evidence:
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