Controlled vocabulary of canonical types.
External identifier. atlas:scheme holds the scheme token; atlas:value holds the string.
Source, method, timestamp and confidence for an identifier or claim.
Reified triple with provenance. The triple must also exist directly on the entity.
Signals that an entity needs human review.
Direct surface form. Add a language tag where known.
Controlled tokens: wikidata-qid | google-mid | atlas-internal.
Opaque JSON cache blob from any source. Source is recorded in the associated Provenance node.