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XQuery from the Experts: A Guide to the W3C XML Query Language by Philip Wadler, Jim Tivy, Jérôme Siméon, Michael Rys, Jonathan Robie, Michael Kay, Mary Fernández, Denise Draper, Don Chamberlin, Howard Katz - Editor

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Chapter 6. Mapping between XML and Relational Data

Denise Draper

XQuery operates on XML documents—or to be more precise, on instances of an XML data model. Often we assume that these XML documents exist in files or as data in network messages. But in another very common scenario, documents are generated on demand by being translated or created from a different data representation. Relational databases are probably the most important of these different sources of data for XML applications.

This chapter explores the various methods for mapping between XML and relational data models. As of this writing, many relational database vendors have announced various kinds of support for XML, ranging from the ability to transmit results as XML to built-in ...

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