The PROV Ontology (PROV-O) expresses the PROV Data Model [PROV-DM] using the OWL2 Web Ontology Language (OWL2) [OWL2-OVERVIEW]. It provides a set of classes, properties, and restrictions that can be used to represent and interchange provenance information generated in different systems and under different contexts. It can also be specialized to create new classes and properties to model provenance information for different applications and domains. The PROV Document Overview describes the overall state of PROV, and should be read before other PROV documents.

P-Plan is an OWL2 ontology developed to describe abstract scientific workflows as plans and link them to their past executions.

P-Plan extends the W3C PROV-O Ontology [PROV-O], which encodes the W3C PROV data model [PROV-DM]. PROV-DM describes the provenance of objects (prov:Entities) as a record of assertions about the steps (prov:Activities) that generated them and the entities used in those steps. Provenance describes past execution, but does not offer a vocabulary to express the plan that the execution was supposed to follow.