I get this when hacking persistence.xml metadata: | Caused by: org.jboss.xb.binding.JBossXBRuntimeException: Requested element {http://java.sun.com/xml/ns/persistence}jta-data-source is not allowed in this position in the sequence. The next element should be {http://java.sun.com/xml/ns/persistence}properties | I'm not really understanding where this order is set? The test code is in metadata project: - http://anonsvn.jboss.org/repos/jbossas/projects/metadata/trunk/src/test/j... And this are the two metadata classes: - http://anonsvn.jboss.org/repos/jbossas/projects/metadata/trunk/src/main/j... - http://anonsvn.jboss.org/repos/jbossas/projects/metadata/trunk/src/main/j... View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4144937#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...