Query Rewriting for Semantic Web Information Integration

Though significant research has been done in the realm of information integration, continuously increasing amounts and complexity of data demand more advanced techniques for its access. Semantic Web technologies such as OWL and SWRL provide the capacity for rich definitions of data sources, global views, and the mappings between them. An information integration system based on these technologies is thus very attractive; however, OWL and SWRL would appear to introduce significant complexity to query reformulation. We motivate our work via a distributed query system architecture based on Semantic Web technologies, and discuss the application of Global as View and Local as View approaches to this scenario. Finally, we introduce modifications to the Global as View approach for this system and analyze their effects.