The *-ds.xml file is used as a template to generate several (3-6, if I recall correctly) MBeans. Once the MBeans are generated, the *-ds.xml file is ignored. Apps get at the data source by looking up the name (jdbc/LEDataSource in your example) in JNDI which yields one of the MBeans. For web app properties, those are usually best placed into a properties file accessible by the web app (for example, located in WEB-INF/classes), or you could use the properties service - see the properties-service.xml file. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4131205#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...