< class  name="Address">
    <id name="id" column="addressId">
        <generator  class ="native"/>
    </id>
    <set name="people" inverse="true" table="PersonAddress">
        <key column="addressId"/>
        <many-to-many column="personId"
             class ="Person"/>
    </set>
</ class >

< class  name="Address">
    <composite-id  name="addressId"    class ="nl.it84.bo.AddressId" >
         <key-property name="houseNumber" column="HOUSE" type="integer" />
        <key-property name="zipCode" column="ZIPCODE" type="string"/>
      </composite-id>
      <set name="people" inverse="true" table="PersonAddress">
        <key column=column="????????"/>  <!-- что тут писать? -->
        <many-to-many column="personId"   class ="Person"/>
    </set>
</ class >

< class  name="Person">
    <id name="id" column="personId">
        <generator  class ="native"/>
    </id>
    <set name="addresses" table="PersonAddress">
        <key column="personId"/>
        <many-to-many column="????????"  <!-- что тут писать? -->
             class ="Address"/>
    </set>
</ class >