Ontologies, OWL, And The Semantic Web

In philosophy, ontology is the most fundamental branch of metaphysics. Its scope ranges from being to nonbeing, existence/nonexistence, reality/nonreality, entity/nonentity, or thing/nothing and thus covering the divisions and modes of being, i.e., all the general classes of things and relationships with their kinds, types, varieties and instances. Ontology has long and strong commitment to reality, the whole of the world as the totality of all entities and relationships.

Site – http://en.wikipedia.org

In information sciences and engineering, an ontology (instead of Ontology) is claimed to be ‘an explicit specification of conceptualization’, ‘a theory of content’, ‘a theory (a system) of concepts/vocabulary used as building blocks of information processing systems’, ‘a set of agreements about a set of concepts’, or ‘the representation of the semantics of terms and their relationships’. Also, it is interpreted as ‘the class hierarchy in object-oriented paradigm’, ‘a complete schema of the domain concepts’, ‘an entity-relationship schema with subsumption relations between concepts’. Sometimes, one can meet such definitions as ‘conceptual patterns’, ‘concept heterarchies or hierarchies’, ‘a body of conceptualizations’, ‘schemata’, or ‘metadata scheme’, ‘a common set of terms’, ‘a controlled vocabulary of terms’, ‘a representation vocabulary’, or ‘a body of knowledge’.

Site – http://en.wikipedia.org

OWL is an acronym for Web Ontology Language, a markup language for publishing and sharing data using ontologies on the Internet. OWL is a vocabulary extension of RDF (the Resource Description Framework) and is derived from the DAML+OIL Web Ontology Language. Together with RDF and other components, these tools make up the semantic web project. The OWL specification is maintained by the World Wide Web Consortium (W3C).

Site – http://www.w3.org

See my earlier post on the The Semantic Web

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