<class name="Employes" table="Employes" lazy="true">
    <id name="ID" column="EmployeID" type="int" unsaved-value="-1">
      <generator class="identity"/>      
    </id>
    <property name="F" column="F" type="string"/>
    <property name="I" column="I" type="string"/>
    <property name="O" column="O" type="string"/>        
    <many-to-one name="PersonalData" class="PersonalData" column="EmployeID" unique="true" lazy="proxy"/>
   </class>