The following image shows the Add Relationship wizard with the Registration_To_Address relationship being created. A single registered user can have multiple shipping addresses on record, so the multiplicity is [0..*]. On the other hand, a shipping address has a [0..1] relationship with the registered user, and the fk_shipaddress role is added to the foreign key.
To create a relationship between two enterprise beans (EJB 2.x):
The following image shows the Registration_To_Address relationship in the Relationships section of the EJB deployment descriptor editor: