ADR A-07: Eligibility authoring direction and extraction contract

Status

Accepted

Context

Eligibility is currently green-field in this repository. To avoid domain leakage and keep extraction reproducible, authoring order and extraction boundaries must be explicit.

Decision

Eligibility authoring follows this sequence:

1. Non-domain examples in ontology/eligibility/examples/.
2. Mechanism prose and fenced content in ontology/eligibility/README.md.
3. Extracted artefacts in ontology/eligibility/spec/eligibility.ttl, ontology/eligibility/vocab/eligibility-vocab.ttl, and ontology/eligibility/shapes/*.ttl.
4. Projection contracts in ontology/eligibility/projection/*.ttl.
5. Conformance fixtures in ontology/eligibility/test/.

Extraction contract:

• turtle-spec blocks generate spec/eligibility.ttl.
• turtle-vocab blocks generate vocab/eligibility-vocab.ttl.
• turtle-shapes blocks generate shapes/*.ttl.
• turtle-example is illustrative only and never extracted.

Consequences

• The layer can be regenerated consistently.
• Domain-neutral substrate content remains clearly separated from worked examples and optional applied material.
• Gate-based verification has concrete artefacts to check.