Difficulté sur l'approche pour concevoir un mapping HBM d' après un diagram de class

J'ai résolu ce problème de mon côté ( comme quoi 9 heures plus tard on y arrive toujours;) )

Voici ma solution :
Code:
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<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping SYSTEM
    "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
 
<hibernate-mapping package="ch.ifage.hibernate.ms.model">
 
	<class name="Personne" table="Personne" batch-size="10">
 
	 	<id name="idPersonne"  column="ID_PERSONNE" type="long">
	 	 		<generator class="increment"/>
		</id>
 
		<property name="nom" column="NOM"/>
		<property name="prenom" column="PRENOM"/>
		<property name="email" column="EMAIL"/>
		<property name="telephone" column="TELEPHONE"/>
		<property name="genre" column="GENRE"/>
		<property name="dateCreation" column="DATE_CREATION"/>
 
 
		<joined-subclass name="Client" table="CLIENT" >
			<key column="ID_PERSONNE"/>
			<property   name="societe" />
			<property   name="ranking" type="int" />
 
				<component	name="office" class="Adresse">
					<property	name="rue" type="string" column="OFFICE_RUE" not-null="true"/>
					<property	name="ville" type="string" column="OFFICE_VILLE" not-null="true"/>
					<property	name="codePostal" type="int" column="OFFICE_CODEPOSTAL" not-null="true"/>
					<property	name="pays" type="string" column="OFFICE_PAYS" not-null="true"/>
				</component>
 
				<bag name="offreRecueS" 
					inverse="true" 
					lazy="false"
					cascade="save-update, merge" >
					<key column="ID_CLIENT"/>
					<one-to-many class="Offre" />
				</bag>
 
		</joined-subclass>
 
 
		<joined-subclass name="Vendeur" table="VENDEUR" batch-size="10" lazy="false">
			<key column="ID_PERSONNE"/>
 
			<property   name="ranking" type="int" />
 
 
				<set name="competenceS" 
					lazy="extra"
					table="COMPETENCE_VENDEUR"	 
					cascade="save-update"
					fetch="join">
						<key column="ID_VENDEUR" />
						<many-to-many class="Competence" column="ID_COMPETENCE"/>
				</set>
 
				<bag name="offreFaiteS" 
					lazy="extra"
					inverse="true" 
					cascade="save-update, merge"
					fetch="join">
					<key column="ID_VENDEUR"/>
					<one-to-many class="Offre"/>
				</bag>		
		</joined-subclass>
 
	</class>
 
</hibernate-mapping>