[Part] 3 [Document] Mapping to RDF Graphs defines a mapping of the OWL 2 constructs into RDF graphs, and thus defines the primary means of exchanging OWL 2 ontologies in the Semantic Web. [Type] 
Core Specification
F o r U s e r s
C o r e S p e c i f i c a t i o n
S p e c i f i c a t i o n