Hi Tobias, "orm.xml" is new in EJB3, and it describes how the bean is mapped to the database (e.g. table names, column names, datatypes, just everything which can b declared with annotations). If you read the EJB book by Monson-Haefel/Burke you will find some information about it. Or you start by digging around the ejb specifiation: http://jcp.org/aboutJava/communityprocess/final/jsr220/index.html (take a look at the PDF labeled "JSR-000220 Enterprise JavaBeans 3.0 Final Release (persistence)"). Hope this helps Wolfgang View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3986143#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...