by using the ENC you're not coupling you code to the app. server (there are no JBoss specific JNDI names). you will have to include an app. server specific dep. desc. (jboss.xml), but once you're code is compiled you're good to go as far as portability. if you wanted to change to Glassfish, for example, you would just replace the jboss.xml with an equivalent Glassfish dep. desc.. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4081532#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...