Hibernate继承映射的难点

       在Hibernate的继承映射,怎么在子类里映射一对多的关系？


父类Person,子类Doctor,Person的配置文件如下：



<class name="com.yang.model.human.Person" table="t_person">
<id name="personId" column="person_id">
<generator class="native" />
</id>
<discriminator type="string" column="personType"></discriminator>
<property name="personName" />

     <joined-subclass name="com.yang.model.human.Doctor" table="t_doctor">
         <key column="personId" foreign-key="FK_AdditionUses_IngredientUses"/>
         <many-to-one name="technicalOffice" column="officeid" class="com.yang.model.TechnicalOffice" foreign-key="FK_AdditionUses_Additions"/>
    </joined-subclass>



子类Doctor：（Doctor与TechnicalOffice是一对多双向的关系）

private String password;
//医生所属的科室
private TechnicalOffice technicalOffice;





怎么写Person的配置文件才正确？