Does TopLink support Oracle Databases XML data type?
Yes, 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). TopLink also provides expression operators to support querying XMLType. You’ll need to adjust the Workbench and runtime classpath to include the Oracle Database xdb.jar. Refer to Direct to XMLType Mapping in the Oracle TopLink Developer’s Guide for more information.