JDO - Deskriptor / Mapping
<?xml version="1.0"?>
<jdo>
<package name="de.oio.vo">
<class identity-type="datastore"
name="Person">
<field name="name">
<extension key="type"
value="java.lang.String"
vendor-name="xyz"/>
<extension key="column" value="NAME"
vendor-name="xyz"/>
</field>
</class>
</package>
</jdo>