I see your point, and I'm certainly starting to subscribe to this line of thinking. The only thing I'm still wondering (which may be a better question for the EJB3 forum) is if there is a way to legally implement non-persistent methods in the entity? I guess this would fall into the "behavior" category, which you mentioned. It would behave something like the @Transient annotation for methods, rather than fields as the doc states. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3998339#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...