SPARQLing constraints for RDF

The goal of the Semantic Web is to support semantic interoperability between applications exchanging data on the web. The idea heavily relies on data being made available in machine readable format, using semantic markup languages. In this regard, the W3C has standardized RDF as the basic markup language for the Semantic Web. In contrast to relational databases, where data relationships are implicitly given by schema information as well as primary and foreign key constraints, relationships in semantic markup languages are made explicit. When mapping relational data into RDF, it is desirable to maintain the information implied by the origin constraints. As an improvement over existing approaches, our scheme allows for translating conventional databases into RDF without losing general constraints and vital key information. As much as in the relational model, those information are indispensable for data consistency and, as shown by example, can serve as a basis for semantic query optimiz...

• Type: Conference
• Year: 2008
• Where: EDBT
• Authors: Georg Lausen, Michael Meier 0002, Michael Schmidt
• Keywords: Database, EDBT 2008, Semantic, Semantic Markup Languages, Semantic Web