Most of the jar files contain a META-INF/manifest.mf file that identify the version for that jar file. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4172873#4172873 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4172873