# Knowledge Graph A structured network of entities (nodes) and their relationships (edges), typically machine-readable, used to represent and query interconnected knowledge. > [!info]- Canonical definition > This term is maintained in the [[vocab|PKM Vocabulary]] SKOS source, not here. > `pkmv:KnowledgeGraph` · [term page](https://w3id.org/pkm/vocab/KnowledgeGraph) · [Turtle](https://w3id.org/pkm/vocab/terms/KnowledgeGraph.ttl) ## Scope Refers specifically to the Neo4j graph instance mirroring and linking PKM notes and health events. Distinguish from Ontology (schema) and Taxonomy (classificatory hierarchy) - this is the populated data instance. ## Broader - [[Graph Database (Term)|Graph Database]] — partitive (ISO 25964) - [[Knowledge System (Term)|Knowledge System]] ## Collections - [[Concept Collection (Collection)|Concept Collection]] - [[Knowledge Collection (Collection)|Knowledge Collection]] - [[Semantic Web Standards (Collection)|Semantic Web Standards]] --- #vocab/term · created 2026-08-28 · modified 2026-08-29