A SPARQL Query Engine over Web Ontologies using Contextual Logic Programming
Nuno Lopes (Universidade de Évora)
Salvador Abreu (Universidade de Évora)

Querying is one of the key aspects in the Semantic Web. SPARQL, a W3C recommendation, attempts to become the standard Web query language. The XPTO system is capable of representing and querying ontologies described in the OWL language using Contextual Logic Programming. Here is presented a component of the XPTO system that enables answering SPARQL queries.

Semantic Web and Ontologies