Mapping Object-Oriented Database Models Into RDF(S)

Resource description framework RDF and RDF schema (collectively called RDF(S)) are the normative languages to describe the Web resource information. How to construct RDF(S) from the existing data sources is becoming an important research issue. In currently, much application information is stored in the object-oriented database, and how to construct RDF(S) from the existing object-oriented database becomes an important issue to be solved in the context of the semantic Web. By comparing and analyzing the characteristics of an object-oriented database and RDF(S), this paper proposes an approach for mapping object-oriented database models into RDF(S). After giving the formal definitions of object-oriented database and RDF(S), a mapping approach from object-oriented database models to RDF(S) is proposed. Further, a mapping example is provided to show that the approach is feasible, and the analyses and discussions about the approach are done. Finally, the correspondence between object-oriented database query language and RDF query language SPARQL is given.