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Querying Embedded RDF Data with XML Technology : A Feasibility Study

XML has become the de facto standard for representing and accessing data on the Web. At the same time RDF is becoming more and more popular for representing metadata. While RDF also has an XML-based syntax, storage and query technologies for the two formats are not compatible due to differences in the data model. This is a potential problem when trying to query data that combine XML data with RDFbased metadata annotations. In this paper, we investigate the feasibility of querying such embedded RDF models with XML technologies. We motivate the problem using the vision of intelligent content objects, describe an approach for querying RDF data with XQuery and identify problems and opportunities based on experiments with real world data.