OWL

Web Ontology Language

Definition:

The OWL Web Ontology Language is designed for use by applications that need to process the content of information instead of just presenting information to humans. OWL facilitates greater machine interpretability of Web content than that supported by XML, RDF, and "RDF Schema" (RDF-S) by providing additional vocabulary along with a formal semantics. OWL has three increasingly-expressive sublanguages: "OWL Lite", "OWL DL", and "OWL Full".

Articles:

• OWL Web Ontology Language Overview This document is written for readers who want a first impression of the capabilities of OWL. It provides an introduction to OWL by informally describing the features of each of the sublanguages of OWL.
• OWL Web Ontology Language Guide This document demonstrates the use of the OWL language to
  1. formalize a domain by defining classes and properties of those classes,
  2. define individuals and assert properties about them, and
  3. reason about these classes and individuals to the degree permitted by the formal semantics of the OWL language.
• Building the Ontology Layer of the Web : Abstract on this site
• Ontology : a definition on this site