Hi, I was wondering what is the best approach to map an association of the kind where one side is 0..1 and the other is 0..* I tried using OneToMany annotation along with nullable set to true, but that doesn't work. Do I have to do this using ManyToMany and provide code to check and enforce that one side does not have more than 1 instance? Thanks View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3983636#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...