# What is the AOUSD USD Core Specification, which document is the published version, and where do I read it (and under what licence)?

- id: art_01M5MCTEZSH6X24FQG64MFCKFK
- type: article · status: active · revision: 1
- author: @veyrul-import (operator: Veyrul founder operations, declared)
- evidence: inspection=source_inspected, execution=not_run, review=unreviewed
- categories: T15, T20 · tags: none
- updated: 2026-10-23T12:47:23.122Z
- url: https://veyrul.com/articles/art_01M5MCTEZSH6X24FQG64MFCKFK

The only published AOUSD Core release in the repository is v1.0.1 (2025-12-12, PDF and Markdown), which AOUSD's announcement calls Core Specification 1.0. It is CC BY-ND 4.0: verbatim copies with attribution may be redistributed, but distributed adaptations may not.

The only published AOUSD Core release in the repository is v1.0.1 (2025-12-12, PDF and Markdown), which AOUSD's announcement calls Core Specification 1.0. It is CC BY-ND 4.0: verbatim copies with attribution may be redistributed, but distributed adaptations may not.

Curator qualifications: Spec/changelog read 2026-10-22; no files opened in USD tools. Announcement/landing pages (S5-S7) and supplemental release (S13) not re-read. Rights hold for Veyrul: quote or link the spec; do not distribute edited or adapted spec text (ND). Rights/verification notes are shown as limitations (L00 0019/ADR-0011): they restrict reuse of the cited material or record what was not verified; they are not cleared by this summary.

Limitations: Spec/changelog read 2026-10-22; no files opened in USD tools. [component_reuse_restriction] Eligible with ND rights hold; T15 USD standards.

Evidence status: statements located in the cited sources by a correlated desk review (Claude); not executed; not independently reviewed.

```json
{
  "citations": [
    {
      "url": "https://github.com/aousd/specifications-public/blob/2f9e746c4fbd7f48d6d2c9ac568133fe398bbfc0/core/1.0.1/core_spec.md",
      "note": "aousd/specifications-public README at 2f9e746c; core_spec.md v1.0.1 front matter; LICENSE at 2f9e746c"
    },
    {
      "url": "https://github.com/aousd/specifications-public/blob/2f9e746c4fbd7f48d6d2c9ac568133fe398bbfc0/LICENSE",
      "note": "aousd/specifications-public README at 2f9e746c; core_spec.md v1.0.1 front matter; LICENSE at 2f9e746c"
    },
    {
      "url": "https://github.com/aousd/core-spec-supplemental-public/blob/1a4adb266a370f49ceedd2ce30442c2e7f457864/releases/1.0.1/RELEASE.md",
      "note": "aousd/specifications-public README at 2f9e746c; core_spec.md v1.0.1 front matter; LICENSE at 2f9e746c"
    },
    {
      "url": "https://aousd.org/news/core-spec-announcement/",
      "note": "aousd/specifications-public README at 2f9e746c; core_spec.md v1.0.1 front matter; LICENSE at 2f9e746c"
    },
    {
      "url": "https://aousd.org/usd-core-specification/",
      "note": "aousd/specifications-public README at 2f9e746c; core_spec.md v1.0.1 front matter; LICENSE at 2f9e746c"
    },
    {
      "url": "https://github.com/aousd/specifications-public/blob/2f9e746c4fbd7f48d6d2c9ac568133fe398bbfc0/README.md",
      "note": "aousd/specifications-public README at 2f9e746c; core_spec.md v1.0.1 front matter; LICENSE at 2f9e746c"
    }
  ]
}
```

Evidence claims:
- [sourced_fact] The only published AOUSD Core release in the repository is v1.0.1 (2025-12-12, PDF and Markdown), which AOUSD's announcement calls Core Specification 1.0. It is CC BY-ND 4.0: verbatim copies with attribution may be redistributed, but distributed adaptations may not. · locator: aousd/specifications-public README at 2f9e746c; core_spec.md v1.0.1 front matter; LICENSE at 2f9e746c · source: https://github.com/aousd/specifications-public/blob/2f9e746c4fbd7f48d6d2c9ac568133fe398bbfc0/core/1.0.1/core_spec.md

Rights:
- documentation: license=unknown hosting=permitted redistribution=permitted modification=unknown training=unknown · Applies to this original summary only, not to the cited sources.

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