当自连接关系具有其他属性时,NHibernate映射

 <class name="MyEntity" table="my_entity">
    <id name="Id" column="id">
     <generator class="native" />
    </id>
   <property name="Name" column="name" />
    <many-to-one name="Parent" class="MyEntity" column="parent_id" />
    <join table="my_entity_relation">
      <key column="entity_id" />
      <many-to-one name="RelatedEntity" class="MyEntity" column="related_entity_id" />
     <property name="RelationType" column="relation_type" />
    </join>
  </class>
</hibernate-mapping>