OWLRDF
OWLRDF is the RDF-based representation of the Web Ontology Language (OWL) used to encode OWL ontologies as RDF graphs. It is not a separate language but a mapping that translates OWL constructs into RDF triples so they can be stored, queried, and reasoned over in RDF tools.
In OWLRDF, ontologies use the standard OWL vocabulary (owl:Class, owl:ObjectProperty, owl:DatatypeProperty, owl:Ontology, owl:Restriction) along with RDF
An ontology encoded in OWLRDF can be serialized in RDF/XML or Turtle, making it interoperable with RDF
Historically, OWLRDF describes how OWL semantics are encoded in RDF for OWL 1 and remains a basis
Limitations include potential verbosity and the need to understand blank node scoping, as well as the distinction