RDF Vocabulary Description Language (RDF Schema)
URI: http://www.w3.org/TR/rdf-schema/
OWL Overview
URI: http://www.w3c.org/TR/owl-features/
OWL Reference
URI: http://www.w3c.org/TR/owl-ref/
OWL Semantics and Abstract Syntax
URI: http://www.w3c.org/TR/owl-semantics/
OWL Use Cases and Requirements
URI: http://www.w3.org/TR/webont-req/