commonmeta-schema 1.0rc2

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_v1.0rc2.json      # the Commonmeta JSON Schema (current: v1.0rc2)
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_v1.0rc2.json; new versions are added alongside it rather than replacing existing files, so implementations can pin a version. The schema_version field of a Commonmeta record is the URL https://commonmeta.org/commonmeta_v1.0rc2.json.

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).

Package versions follow the schema version:

• PyPI uses PEP 440 form: 1.0rc2
• crates.io uses SemVer form: 1.0.0-rc.2

To keep both versions in sync, run:

python scripts/sync_versions.py

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

python scripts/sync_versions.py --check

Before publishing the crate, sync canonical assets from the repo root into the Rust crate directory:

mkdir -p rust/fixtures rust/schemas
rsync -a --delete --exclude '.DS_Store' fixtures/ rust/fixtures/
rsync -a --delete schemas/ rust/schemas/

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 1.0rc2 to PyPI with uv publish.
2. Publish 1.0.0-rc.2 to crates.io with cargo publish.
3. Create a git tag v1.0rc2 after both uploads succeed.

Copy-paste release run

Run this from the repository root:

set -euo pipefail

# 1) Ensure Rust crate version matches Python version
python scripts/sync_versions.py --check

# 2) Sync canonical assets into the Rust crate
mkdir -p rust/fixtures rust/schemas
rsync -a --delete --exclude '.DS_Store' fixtures/ rust/fixtures/
rsync -a --delete schemas/ rust/schemas/

# 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 v1.0rc2
git push origin v1.0rc2

License

MIT © 2026 Front Matter