Documentation about orm.xml

We wanted to convert our legacy hbm.xml files to JPA standard orm.xml files.
Is there any official documentation or a list which gives a one to one mapping of all the tags in hbm.xml file to the orm.xml file?
This would be of immense use to us since this would help us convert all the files correctly in a fool proof manner.

The documentation is the XSD file. You can also use the gradle plugin for doing the migration. I also heard that a Maven plugin is in the works.