document: The Yin\/Yang web : XML syntax and RDF semantics XML is the W3C standard document format for writing and exchanging information on the Web . RDF is the W3C standard model for describing the semantics and reasoning about information on the Web . Unfortunately , RDF and XML -- although very close to each other -- are based on two different paradigms . We argue that in order to lead the Semantic Web to its full potential , the syntax and the semantics of information needs to work together . To this end , we develop a model-theoretic semantics for the XML XQuery 1.0 and XPath 2.0 Data Model , which provides a unified model for both XML and RDF . This unified model can serve as the basis for Web applications that deal with both data and semantics . We illustrate the use of this model on a concrete information integration scenario . Our approach enables each side of the fence to benefit from the other , notably , we show how the RDF world can take advantage of XML query languages , and how the XML world can take advantage of the reasoning capabilities available for RDF .
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