I've been referred here from my own similar query: http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4259203#... It would appear the purpose of the these two files is to map a Java EE Environment Naming Context (enc) 'local' entry (ie java:/comp/env/jdbc/MyDataSource) to a jBossNS 'global' naming entry (ie java:/MyDataSource). Have I got this right? Now, is there a way to globally define this mapping for all jBoss web applications in a similar fashion that the *-ds.xml datasource is globally defined? I would like to deliver an application that does not have jBoss specific configuration entries in the web.xml and does not need a jboss-web.xml file. I know there are applications (I've installed at least one) that work with jBoss that only need the *-ds.xml deployed. What's the trick? Thanks, Bob. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4259216#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...