commonmeta-schema 1.0rc7

Commonmeta JSON Schemas and conformance fixtures

commonmeta-schema

Language-neutral JSON Schema definitions and conformance fixtures for Commonmeta, the scholarly metadata interchange format.

This repository is the shared source of truth consumed by the following Commonmeta implementations:

• commonmeta-rs (Rust)
• commonmeta-py (Python)

Keeping the schema and the golden fixtures in one place lets every implementation validate against the same contract and run the same cross-format conformance tests.

Layout

schemas/
  commonmeta_v1.0.json         # the Commonmeta JSON Schema (current)
  commonmeta_v1.0rc*.json      # earlier release candidates, retained but not exported
fixtures/
  commonmeta/                  # canonical Commonmeta records (round-trip + expected output)
  <format>/                    # input fixtures in a given source format
  <format>_out/                # expected writer output (Commonmeta -> format)
  <format>_commonmeta/         # expected reader output for non-JSON inputs

Schema versions

Schemas are versioned by filename. The current version is commonmeta_v1.0.json, and the schema_version field of a Commonmeta record is the URL https://commonmeta.org/commonmeta_v1.0.json.

Earlier release candidates (commonmeta_v1.0rc1…rc5) are kept in schemas/ for reference, but the packages export only v1.0 — new versions are added alongside existing files rather than replacing them, so implementations can pin a version.

Fixture conventions

The conformance harness in each implementation follows these naming rules (a missing pair is skipped, so partial coverage is fine):

Test kind	Input	Expected
Round-trip	fixtures/commonmeta/<name>.json	itself (re-serialized, semantically equal)
Reader (JSON input)	fixtures/<format>/<name>.json	fixtures/commonmeta/<name>.json
Reader (text input)	fixtures/<format>/<name>.<ext>	fixtures/<format>_commonmeta/<name>.json
Writer	fixtures/commonmeta/<name>.json	fixtures/<format>_out/<name>.<ext>

Formats currently covered: crossref, crossref_xml, datacite, datacite_xml, schemaorg, csl, bibtex, cff, ris, jsonfeed, inveniordm, codemeta.

Semantic comparison

Fixtures are compared as parsed JSON trees, not as strings, using an omitempty-aware and numeric-aware diff: key order and whitespace are irrelevant, an absent field equals an empty/zero/null value, and 52 equals 52.0. This keeps hand-authored fixtures robust across implementations.

Using this repository

Each implementation vendors (copies) the schema and fixtures it needs from here. Update the canonical files in this repository first, then sync them into commonmeta-rs and commonmeta-py.

Packaging and publishing

This repository can be published as both:

• a Python package on PyPI (commonmeta-schema)
• a Rust crate on crates.io (commonmeta-schema)

Publishing is done explicitly via CLI (no automated release pipeline in this repo).

The packages are release candidates on the way to 1.0; both ship the v1.0 schema:

• PyPI uses PEP 440 form: 1.0rc7
• crates.io uses SemVer form: 1.0.0-rc7

scripts/sync_versions.py is the single entry point for preparing a release. It does three things, in this order:

1. Rewrites schemas/commonmeta_v1.0.json from the newest commonmeta_v1.0rc*.json, resetting $id, title, and the schema_version const to the stable v1.0 URL.
2. Mirrors the canonical schemas/ and fixtures/ into rust/schemas/ and rust/fixtures/ (the crate can only package files under rust/).
3. Syncs rust/Cargo.toml's version with pyproject.toml's.

python scripts/sync_versions.py

The ordering matters and is why the mirror lives in the script rather than in a separate rsync step: mirroring before step 1 ships a crate whose commonmeta_v1.0.json still carries the previous rc's schema_version const, which then rejects the crate's own v1.0-stamped fixtures.

To verify sync in CI/local checks without changing files:

python scripts/sync_versions.py --check

Recommended pre-release checks:

python scripts/sync_versions.py --check
uv build
cargo test --manifest-path rust/Cargo.toml
cargo package --manifest-path rust/Cargo.toml

Python (PyPI) via uv publish

1. Ensure you are authenticated for PyPI (recommended: trusted publisher or API token).
2. Build distribution artifacts:

uv build

3. Optionally validate the build metadata:

uvx twine check dist/*

4. Publish to PyPI:

uv publish

Rust (crates.io) via cargo publish

1. Log in once with a crates.io token:

cargo login

2. Validate package contents:

cargo package --manifest-path rust/Cargo.toml --allow-dirty

3. Publish:

cargo publish --manifest-path rust/Cargo.toml

Recommended release order

1. Publish 1.0rc7 to PyPI with uv publish.
2. Publish 1.0.0-rc7 to crates.io with cargo publish.
3. Create a git tag v1.0rc7 after both uploads succeed.

Copy-paste release run

Run this from the repository root:

set -euo pipefail

# 1) Regenerate the v1.0 alias, mirror assets into rust/, sync the crate version
python scripts/sync_versions.py

# 2) Fail the release if anything is still out of sync
python scripts/sync_versions.py --check

# 3) Validate both package builds
uv build
cargo test --manifest-path rust/Cargo.toml
cargo package --manifest-path rust/Cargo.toml

# 4) Publish Python package
uv publish

# 5) Publish Rust crate
cargo publish --manifest-path rust/Cargo.toml

# 6) Tag release (replace with the release version)
git tag v1.0rc7
git push origin v1.0rc7

License

MIT © 2026 Front Matter