Quick-start · implementer / developer

Goal: build against the standard and stay byte-compatible with the reference cores.

The contract

• Payload schema (JSON Schema 2020-12) and the JSON-LD context.
• Canonicalization is RFC 8785 (JCS); the integrity hash is SHA-256 over the canonical bytes. This is the anti-fork keystone - two conformant implementations MUST produce byte-identical canonical JSON and the same hash.
• The conformance vectors are the oracle: canonical bytes, hashes, golden embedded PDFs, negatives, and a differential-fuzz corpus. Reproduce them exactly.

Reference implementations

pip install openom-core     # Python: embed/read/inspect/extract/validate
npm  install openom-js       # TypeScript: byte-parity with the Python core

Validation model

Two tiers: schema errors block; consistency warnings never block; market truth is out of scope forever. See the code catalog for every code and its requirement clause.