A Query Language for Web Ontologies
Birte Glimm · 2004
In August 2002 the Joint United States/European Union ad hoc Agent Markup Language Committee announced the first release of the DAML Query Language (DQL) Abstract Specification. A revision of the specification followed in April 2003. This work analyses the current DQL specification and provides a (partial) implementation as a feasibility study. The prototype uses Description Logic reasoners for automated reasoning services over the DAML+OIL knowledge bases to compute the query answers. The queries are restricted to conjunctive queries that have a tree-like structure. The prototype successfully computes queries against knowledge bases in the Semantic Web. It shows that a query transformation into Description Logics queries is a feasible setting to provide a DQL service. However, further performance improvements are necessary before the prototype is usable in real world applications.