<hibernate-mapping package='org.pcj.scrubj.model'>
<class name='User' table='Users' dynamic-insert='true' dynamic-update='true' optimistic-lock='version'>
  <id name='Id' column='ID'>
   <generator class='native'/>
  </id>
  <natural-id mutable='false'>
   <property name='Pager'/>
  </natural-id>
  <version name='Version'/>
  <set name='References' table='User_Ref_set' cascade='save-update'>
   <key column='User_ID'/>
   <element type="org.pcj.scrubj.types.Ref"/> <!-- implements UserType -->
  </set>
  <property name='Firstname'/>
  <property name='Lastname'/>
  <property name='Email'/>
  <property name='Cell'/>
</class>
</hibernate-mapping>