How do I write XML mapping file for my following generic class Ring<T>? The red character in the following XML file always appears error. NHibernate always shows cannot find class Ring.

Could I get some advices?

Thanks.

Hibernate version:
1.2.1

Mapping documents:
<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" namespace="DeAfri.Core.Domain" assembly="DeAfri.Core">
<class name="Ring" table="`tRing`" lazy="false">
<id name="ID" column="`ID`" type="Guid">
<generator class="guid"/>
</id>
<discriminator column="Sex"/>
<subclass name="MaleRing" lazy="false">
<bag name="Diamonds" lazy="false">
<key column="RingID"/>
<one-to-many class="MaleDiamond"/>
</bag>
</subclass>
<subclass name="FemaleRing" lazy="false">
<bag name="Diamonds" lazy="false">
<key column="RingID"/>
<one-to-many class="FemaleDiamond"/>
</bag>
</subclass>
</class>
</hibernate-mapping>

Domain object classes:
public abstract class Diamond { }
public class MaleDiamond : Diamond { }
public class FemaleDiamond : Diamond { }
public abstract class Ring<T> where T : Diamond
{
public IList<T> Diamonds { get; set; }
}
public class MaleRing : Ring<MaleDiamond> { }
public class FemaleRing : Ring<FemaleDiamond> { }

Try changing it to this:

<class name="DeAfri.Core.Domain.Ring, DeAfri.Core" table="`tRing`" lazy="false">