mapping.xml

<?xml version="1.0" encoding="utf-8"?>
<hibernate-mapping xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" namespace="Common.Entities" assembly="Common, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" xmlns="urn:nhibernate-mapping-2.2">
  <class name="DerivedClass2" lazy="false" table="DERIVED_CLASS_2">
    <id name="Id" type="Int32">
      <generator class="assigned" />
    </id>
    <property name="ClassProp1" />
    <property name="ClassProp2" column="CLASS_PROP_2" />
    <property name="BaseProp1" column="BASE_PROP_1" />
    <property name="BaseProp2" column="BASE_PROP_2" />
    <property name="BaseProp3" column="BASE_PROP_3" />
  </class>
  <class name="DerivedClass" lazy="false" table="DERIVED_CLASS">
    <id name="Id" type="Int32">
      <generator class="assigned" />
    </id>
    <property name="ClassProp1" />
    <property name="ClassProp2" column="CLASS_PROP_2" />
    <property name="BaseProp1" column="BASE_PROP_1" />
    <property name="BaseProp2" column="BASE_PROP_2" />
    <property name="BaseProp3" column="BASE_PROP_3" />
  </class>
</hibernate-mapping>