<!-- Capabilities -->   
    <class name="edina.clive.domain.Capabilities" table="services">
    <meta attribute="class-description">
      The main class holding a layer object (further layers held inside this layer objects sub layers)
    </meta>
        
        <id name="productName">
            <generator class="assigned"/>
        </id>
       
      <!-- serviceTitle?? -->
       
<!-- TODO: How do to this avoiding one-to-one and not insinuating a set -->
<!--
      <set name="layers" table="LAYERS">
         <key>
            ## <column name="layerName" /> ##
            <column name="productName" />
         </key>
          <one-to-many class="edina.clive.domain.Layer" />
       </set>-->
   <one-to-one name="layers" class="edina.clive.domain.Layer" />
       
        <property name="capabilities" column="capabilitiesurl"/>
        <property name="mapURL"/>
        <property name="featureURL"/>
        <property name="printURL"/>
        <property name="cohabitable"/>
        <property name="customVendorSpecificAttributes" column="vendorspecific"/>       
    </class>
   
<!-- Layer -->
    <class name="edina.clive.domain.Layer" table="layers">
    <meta attribute="class-description">
      A layer object which holds a list of layer sub-objects and a list of Style names in place of a style object
    </meta>

    <!--  also db column layerbbox -->
        <composite-id>
           <key-property name="layerName" />
           <key-property name="productName"/>
        </composite-id>
       
       <property name="subLayers" column="subLayers" type="edina.clive.domain.hibernate.SubLayerUserType"/>
       
   <!-- TODO: Envelope -->
      
       <!-- it may be possible to do this the originally intended way (having two comma separated fields in the Layer table and building from them) -->
       <set name="styles" table="STYLES">
         <key>
            <column name="styleName" />
            <column name="styleTitle" />
         </key>
          <one-to-many class="edina.clive.domain.Style" />
       </set>
      
      <property name="layerTitle" />
      <property name="srs" column="layerSRS" />
      <property name="minimumScale" column="layerscalemin"/>
      <property name="maximumScale" column="layerscalemax"/>
    </class>

Exception in thread "main" org.hibernate.MappingException: broken column mapping for: layers.id of: edina.clive.domain.Capabilities
   at org.hibernate.persister.entity.AbstractPropertyMapping.initPropertyPaths(AbstractPropertyMapping.java:121)
   at org.hibernate.persister.entity.AbstractPropertyMapping.initIdentifierPropertyPaths(AbstractPropertyMapping.java:177)
   at org.hibernate.persister.entity.AbstractPropertyMapping.initPropertyPaths(AbstractPropertyMapping.java:159)
   at org.hibernate.persister.entity.AbstractEntityPersister.initOrdinaryPropertyPaths(AbstractEntityPersister.java:1712)
   at org.hibernate.persister.entity.AbstractEntityPersister.initPropertyPaths(AbstractEntityPersister.java:1742)
   at org.hibernate.persister.entity.AbstractEntityPersister.postConstruct(AbstractEntityPersister.java:2919)
   at org.hibernate.persister.entity.SingleTableEntityPersister.<init>(SingleTableEntityPersister.java:409)
   at org.hibernate.persister.PersisterFactory.createClassPersister(PersisterFactory.java:55)
   at org.hibernate.impl.SessionFactoryImpl.<init>(SessionFactoryImpl.java:226)
   at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1300)
   at edina.clive.dao.DatabaseCapabilitiesDAO.main(DatabaseCapabilitiesDAO.java:147)

<many-to-one name="layers" class="edina.clive.domain.Layer">
      <column name="layerName"/>
      <column name="productName"/><!-- REPEATED COLUMN --> </many-to-one>

<many-to-one name="layers" class="edina.clive.domain.Layer" insert="false" update="false">
      <column name="layerName"/>
      <column name="productName"/>
</many-to-one>