public class User implements java.io.Serializable
{
    private UserPrimaryKey userPk; // Embedding primary key class directly into the bean class.
    private String firstName, middleName, lastName;
    ....
    // Defining one-to-many unidirectional relationship with phone numbers
    private List<PhoneNumber> phoneNumbers = new ArrayList<PhoneNumber>();
    ....
    public List<PhoneNumber> getPhoneNumbers()
    { return phoneNumbers;}
    public void setPhoneNumbers(List<PhoneNumber> phoneNumbers)
    {this.phoneNumbers = phoneNumbers;}
}

<entity class="nl.myCompany.domain.User" access="PROPERTY">
   <attributes>
            <embedded-id name="userPk"/>
            .....
            <one-to-many name="phoneNumbers" target-entity="nl.igz.instellingsrapporten.domain.PhoneNumber" fetch="LAZY">
                <join-table name="USER_PHONE_NUMBERS">
                    <join-column name="userPk"/> <!-- Foreign key mapping to the primary key of the owning side of relationship -->
                    <inverse-join-column name="PHONENUMBER_ID"/> <!-- Non owning side of the relationship -->
                </join-table>
                <cascade><cascade-all/></cascade>
            </one-to-many>
            <transient name="userName"/>
            <transient name="bsn"/>
   </attributes>
</entity>
    <entity class="nl.myCompany.domain.PhoneNumber" access="PROPERTY">
        <attributes>
            <id name="id">
                <generated-value strategy="AUTO"/>
            </id>
            <!--
                The persistence provider will assume any other property (getters-setters in javabeans style) in class
                is a persisitence property and map them based on their based name and type.
            -->
        </attributes>
    </entity>
    <embeddable class="nl.myCompany.domain.UserPrimaryKey" access="PROPERTY">
        <description>
            Identify the persistent properties of the embeddable class.
            These columns don't change hence should not be included in SQL UPDATE statements.
            Make updatable as false.
        </description>
        <attributes>
            <basic name="bsn" optional="false">
                <column name="BSN" nullable="false" updatable="false" unique="true" length="9"/>
            </basic>
            <basic name="loginId">
                <column name="LOGIN_ID" nullable="false" updatable="false" unique="true" length="25"/>
            </basic>
        </attributes>
    </embeddable>

          <one-to-many name="phoneNumbers" target-entity="nl.igz.instellingsrapporten.domain.PhoneNumber" fetch="LAZY">
                <join-table name="USER_PHONE_NUMBERS">
                    <join-column name="bsn"/>
                    <join-column name="userName"/>
                    <!-- Foreign key mapping to the primary key of the owning side of relationship -->
                    <inverse-join-column name="PHONENUMBER_ID"/> <!-- Non owning side of the relationship -->
                </join-table>
                <cascade><cascade-all/></cascade>
          </one-to-many>