# Ontology A formal, explicit specification of a shared conceptualization - the concepts, properties, and relationships within a domain, typically expressed in a language such as OWL. > [!info]- Canonical definition > This term is maintained in the [[vocab|PKM Vocabulary]] SKOS source, not here. > `pkmv:Ontology` · [term page](https://w3id.org/pkm/vocab/Ontology) · [Turtle](https://w3id.org/pkm/vocab/terms/Ontology.ttl) ## Scope Represents the formal layer following the SKOS taxonomy in the Glossary -> Taxonomy -> Ontology pipeline. Use for concepts/classes/axioms intended for formal reasoning, distinct from the looser Taxonomy stage. ## Broader - [[Knowledge System (Term)|Knowledge System]] — partitive (ISO 25964) ## Collections - [[Concept Collection (Collection)|Concept Collection]] - [[Semantic Web Standards (Collection)|Semantic Web Standards]] --- #vocab/term · created 2026-08-28 · modified 2026-08-29