@ALR @epbernard Regardless of the Descriptors, we need the basic function that "specializes" gives us. A way of moving a nested archive into a new 'extension' type. The best example I have as for now is: | EnterpriseArchive ear = .. | WarArchive war = ear.getPathAsA("my.war", WebArchive.class) | In this case, since EnterpriseArchive and WebArchive have a relation it's probably better to have WebArchive archive = EnterpriseArchive.getWebModule(path); but i would like this to be just a struct impl over something like archive.getPathAsA(path, WebArchive.class) View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4257657#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...