D2RQ-Treating Non-RDF Databases as Virtual RDF Graphs

As Semantic Web technologies are getting ma-ture, there is a growing need for RDF applica-tions to access the content of huge, live, non-RDF, legacy databases without having to replicate the whole database into RDF. In this poster, we present D2RQ, a declarative lan-guage to describe mappings between applica-tion-specific relational database schemata and RDF-S/OWL ontologies. D2RQ allows RDF applications to treat non-RDF relational data-bases as virtual RDF graphs, which can be queried using RDQL.