Answering Queries using View for RDF/RDFS-based Relational Data Integration in Semantic Web

摘要

We study the problem of answering queries through a target RDF-based ontology, given a set of view-based mappings between one or more source relational schemas and this target ontology. Particularly, we consider a set of RDFS semantic constraints such as rdfs:subClassof, rdfs:subPropertyof, rdfs:domain, and rdfs:range, which are present in RDF model but neither XML nor relational models. We formally define the query semantics in such an integration scenario, and design a novel query rewriting algorithm to implement the semantics.