Actually most (if not all) JDO implementations need lots of proprietary information to be specified in .jdo files so I don't think that it would make any sense to support JDO specification w/o concrete implementation details. On the other hand you can always add task(s) to your ant build script that execute enhancement utility. Some implementations also have support for XDoclet for JDO metadata generation (Kodo for instance) that can be added to build script too.
at least an integration support for the enhancer and schema tool.
Actually most (if not all) JDO implementations need lots of proprietary information to be specified in .jdo files so I don't think that it would make any sense to support JDO specification w/o concrete implementation details.
On the other hand you can always add task(s) to your ant build script that execute enhancement utility. Some implementations also have support for XDoclet for JDO metadata generation (Kodo for instance) that can be added to build script too.