Stable @id values connect the same entities without creating duplicates.

Expectations and evidence

Required inputs (protocol identifiers)

structured-data, intent

When it applies

Graphs using entity identifiers.

How to check

Build the graph and identify unnamed nodes, variable identifiers and duplicates.

Expectation

The same entities retain identifiers across the corpus; graph references resolve and duplicates are assessed, without requiring all types named in the legacy grid.

Evidence to retain

Archived graph, inventory of present entities and identifiers, assessed references and duplicates.

Non-applicability

No relevant graph with identifiers.

Limitations

Schema.org defines a vocabulary; interpretation depends on the consumer.

Outcome clarification

C requires all expectations across the declared scope. NC requires evidenced contradiction; otherwise NT. NA requires evidence of non-applicability.

Reference scope

Technical reference; the TSEP acceptance rule remains an editorial proposal.