==OWL 2 Web Ontology Language==
keyword: [[semantic web]], 

* The **OWL 2 Web Ontology Language**, informally OWL 2, is an ontology  language for the Semantic Web 
* It became a W3C Recommendation on Oct 27 2009. 
* the main syntactic form of OWL 2 ontologies is based on an RDF serialization, although various alternative syntactic forms are available too.

What is OWL 2

* OWL 2 ontology documents describe information in terms of classes, properties, individuals, and data values the relationships of which can be described by a number of features. 


* relationship with OWL
** OWL 2 is compatible with the OWL standard of 2004 (now referred to as "OWL 1") 
** OWL 2 supersedes OWL 1.

{{tag>semantic_web}}


* introduction: [[http://www.w3.org/TR//owl2-primer/ OWL 2 Primer]]. 
* An overview of the documents of the OWL 2 specification can be found in http://www.w3.org/TR/owl2-overview/

===Reference===

* W3C OWL Working Group: OWL 2 Web Ontology Language: Document Overview. W3C Recommendation, October 27 2009. Available at http://www.w3.org/TR/owl2-overview/.
* Pascal Hitzler, Markus Krötzsch, Bijan Parsia, Peter F. Patel-Schneider, Sebastian Rudolph (editors): OWL 2 Web Ontology Language: Primer. W3C Recommendation, October 27 2009. Available at http://www.w3.org/TR/owl2-primer/