Definition
A structured representation of entities, concepts, or claims connected by named relationships and provenance. In an AI system it is commonly a queryable projection over source material rather than the source material itself.
Distinguish it from nearby terms
A vector index retrieves by similarity; a knowledge graph retrieves or reasons through explicit relationships. Either may be derived from fallible model extraction, so neither is automatically authoritative.
Check your understanding
For every important node or edge, identify the source artifact, extraction method, freshness policy, and way to correct it.