We have jbossxb as well so there is only our dog food on the menu. The issue is whether one will have to use tools to edit the resulting persistent configuration. For JPA that is the only choice as I don't consider going into the db via sql as viable. For XML, there is a better chance of being able to edit the configurations independent of tools. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3957575#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...