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This wiki is a repository of information about the Semantic Web. The contents of this wiki are organised as follows:


  • Introduction to Semantic Web. You can find a large collection of introductory and reference material (Introductory articles, Surveys, Books).
  • Links and Resources pages with external links to other sites, resource quides, lists, community portals and wikis.
  • Projects New and older, research and development related to Semantic Web.
  • Semantic Web related Events mostly academic but also some industry too.
  • Tools and Systems. APIs that implement Semantic Web specifications, Tools categorised per function and integrated semantic web systems.
  • Companies List of companies that develop and market commercial systems based on or supporting Semantic Web technologies.


SemanticWeb.gr projects

  • Thea: A Web Ontology Language - OWL LIbrary for (SWI) Prolog Thea is a Prolog implementation of an OWL library. Thea uses SWI-Prolog’s Semantic Web library for parsing RDF/XML serialisations of OWL documents into RDF triples and then it builds a representation of the OWL ontology as it is defined in the OWL Web Ontology Language Semantics and Abstract Syntax part of the OWL specification. Latest version of Thea (v.0.5.5) , released April 4, 2007, contains a reasoning module with an OWL to Prolog converter, implementing the DLP concept and a DIG wrapper enabling a native Prolog program to communicate with a DIG-enabled reasoner. Thea is available under the GNU/GPL license.

Related Topics

Work in process...


  • Semantic IE Ontology based/Semantic Information extraction, Web/Text mining, Semantic annotation.
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