<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2">
    <class name=Orgnization, BizModel" table="OGNZ" proxy="IOrgnization, BizModel">
        <id name="EntityId" type="string" unsaved-value="null">
            <column name="OrgId" sql-type="integer" not-null="true" unique="true"/>
            <generator class="native"/>
        </id>
        ...
        <many-to-one name="ParentUnit" class="Orgnization, BizModel" unique="true">
            <column name="ParentOrgId" sql-type="int"/>
        </many-to-one>
        <bag name="SubUnits" cascade="save-update" inverse="true" lazy="true" order-by="OrgCode">
            <key column="ParentOrgId"/>
            <one-to-many class="Orgnization, BizModel"/>
        </bag>
    </class>
</hibernate-mapping>

IOrgnization oParentDept = _orgnizationRepository.GetOrgnizationByCode("GM");
IEmployee oBoss = _employeeRepository.GetByEmployeeNo("E000001");

IOrgnization oDept = _bizEntityFactory.CreateEntityInstance<IOrgnization>() as IOrgnization;
oDept.Code = "GM01";
oDept.Name = "GM Sub 01";
oDept.ParentUnit = oParentDept;
oDept.Boss = oBoss;

_orgnizationRepository.Save(oDept);