Hi all! Can anyone explain the difference between the two annotations @IdClass/@Id and @Embeddable/@EmbeddableId. When shall I use @IdClass and when shall I use @EmbeddedId? Does anyone of you have a good answer to this? I would really appreciate your help to make me understand what decision to take in different situations. Best Regards /Oskar View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4043246#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...