Hibernate version: 2.o

Mapping documents:
[code]
<hibernate-mapping
package="de.vit.Bullenkatalog.beans">

<class name="Tier" table="DATA_TIER">
<id name="id" type="java.lang.Long">
<column name="TIER_ID" sql-type="number" not-null="true" />
<generator class="native"/>
</id>
<discriminator column="SEX_ID" />
<property name="lom" type="string">
<column name="TIER_LOM_LANG" sql-type="VARCHAR(20)" />
</property>

<property name="name" type="string">
<column name="TIERNAME" sql-type="VARCHAR(30)" />
</property>

<property name="rasse" type="int">
<column name="RASSE_ID" sql-type="NUMBER" />
</property>

<!--<property name="sex" type="int">
<column name="SEX_ID" sql-type="NUMBER" />
</property>-->

<property name="gebdat" type="java.util.Date">
<column name="GEBDAT" sql-type="DATE" />
</property>

<!-- <many-to-one name="vater" class="Tier" column="VATER_ID" />
<many-to-one name="mutter" class="Tier" column="MUTTER_ID"/>-->

<many-to-one name="besitzer" class="Besitzer" column="TIER_ID" update="false" insert="false" not-null="false" />
<many-to-one name="zuechter" class="Zuechter" column="TIER_ID" update="false" insert="false" not-null="false"/>
<subclass name="Bulle" discriminator-value="1">
<property name="top" type="string">
<column name="TOP_BULLE" sql-type="VARCHAR(1)" />
</property>
<one-to-one name="zw" class="ZW" />

</subclass>
<subclass name="Kuh" discriminator-value="2">

</subclass>
</class>

<class name="ZW" table="DATA_ZW">
<id name="id" type="java.lang.Long">
<column name="TIER_ID" sql-type="number" not-null="true" />
<generator class="native"/>
</id>

<component name="zuchtwerte" class="Zuchtwerte" >
<property name="rze" type="java.lang.Integer">
<column name="RZE" sql-type="NUMBER" />
</property>
<property name="rzg" type="java.lang.Integer">
<column name="GES_ZW" sql-type="NUMBER" />
</property>
<property name="rzm" type="java.lang.Integer">
<column name="RZM" sql-type="NUMBER" />
</property>
<property name="rzn" type="java.lang.Integer">
<column name="RZ_ND" sql-type="NUMBER" />
</property>
<property name="rzs" type="java.lang.Integer">
<column name="RZS" sql-type="NUMBER" />
</property>
<property name="rzz" type="java.lang.Integer">
<column name="RZZ" sql-type="NUMBER" />
</property>
</component>
<component name="milchleistung" class="Milchleistung" >
<property name="betriebe" type="java.lang.Integer">
<column name="HERDEN" sql-type="NUMBER" />
</property>
<property name="eiwei

ugh... ;))))