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# Direct-to-XMLType Mapping

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Using a direct-to-`XMLType` mapping, you can map XML data in the form of a `String` or an org`.w3c.dom.Document` object to an XMLType column in an Oracle Database (introduced in version 9.2.0.1).

If you plan to use direct to XML type mappings in TopLink Workbench and the TopLink runtime, you must include the Oracle Database `xdb.jar` file in the TopLink Workbench classpath (see "Configuring the TopLink Workbench Environment").

The TopLink query framework provides a number of expression operators you can use to create queries based on the content of that XML data (see "XMLType Functions").

See Configuring a Relational Direct-to-XMLType Mapping for more information.