<class name="Actor" table="Actor">

    <!-- The identifier. -->
    <id name="id" column="id" type="int">
      <generator class="identity" />
    </id>

    <!-- The name. -->
    <property name="name" column="name" />

    <map name="fieldValues" table="ActorFieldValues"
      cascade="save-update,lock" >
      <key column="ownerID" />
      <map-key-many-to-many column="fieldID"
        class="com.company.data.field.Field" />
      <many-to-many column="valueID" class="com.company.data.field.FieldValue" />
    </map>

  </class>