there is no difference wether it is for hbm.xml or entity they use the same underlying model. you can avoid catalog/schema by setting default_schema and default_catalog in hibernate.cfg.xml to the schema you are actually reverse engineering ...then all reference to that schema/catalog will be "defaulted" (e.g. set to null) and thus not appear in any mappings, come it hbm.xml or ejb3 annotations. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3968070#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...