Hi, I assume that you want to use EJB3/JPA for creating your entities? In this case, you don't need a role_function entity, and the server will autogenerate the database table for you. The entity "Role" will have a list of "Functions", and the "Function" will have a list of "Role", both connected by annotations. Pseudocode: | @Entity | public class Role implements Serializable | { | @ManyToMany (mappedBy="roles") | public List<Function> functions; | } | | @Entity | public class Function implements Serializable | { | @ManyToMany () | public List<Role> roles; | } | Then, your code can access the functions of a role by "myRole.functions.get(x);". The rest is the job of the server and you don't have to care much about it. Of course, there is quite a bit more to keep in mind. First of all, the two fields should have a getter and setter. More detailed information can be found here: http://www.jboss.org/community/wiki/EJB3relationships Hope this helps Wolfgang View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4263012#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...