You will probably need to store the header on the database anyway, right? I guess putting this to a single field is not going to eliminate the dependency anyway as you still need the information. Those fields are nullable anyway... if using any other protocol in the future we could just keep them NULL. Maybe if you want to separate things you could add the word JMS_ to these fields then it's clear what they are for. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4011605#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...