The question is how to force this? I don't see any good way. But otoh if we leave users such freedom, some mechanism should be in place. I wrote the stuff and I got it wrong, no question about it that the users will/would too. :-) Another question is where to keep this info, so we don't have to do multiple lookups; e.g. in DescribeAction, InstantiateAction, ... View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4230480#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...