OWL stands for Web Ontology Language. It is built on top of RDF. It is used for processing information on the web and was designed to be interpreted by computers and was not designed for being read by people. OWL is written in XML. It has three sublanguages. OWL is a web standard. OWL became a W3C (World Wide Web Consortium) Recommendation in February 2004.
Ontology is about the exact description of things and their relationships. For the web, ontology is about the exact description of web information and relationships between web information.
OWL is a part of the Semantic Web Vision where, Web information has exact meaning Web information can be processed by computers Computers can integrate information from the web
OWL was designed to provide a common way to process the content of web information (instead of displaying it).
OWL and RDF are much of the same thing, but OWL is a stronger language with greater machine interpretability than RDF. OWL comes with a larger vocabulary and stronger syntax than RDF.
OWL has three sublanguages:
By using XML, OWL information can easily be exchanged between different types of computers using different types of operating system and application languages.