<property name="hibernate.cache.provider_class">net.sf.ehcache.hibernate.Provider</property>

<class name="Agency">
   <cache usage="read-write"/>
   <id name="code" type="long" column="code"  unsaved-value="null">
      <generator class="native"/>
   </id>
   <property name="ord" type="long"/>
   <property name="name" type="string"/>
   <property name="ident" type="string"/>
   <property name="hotelCanFee" type="boolean"/>
   <property name="canHaveSubAllotment" type="boolean"/>
   <many-to-one name="postalAddress" class="PostalAddress" column="postalAddress"/>
   <many-to-one name="contactPerson" class="Person" column="contactPerson"/>
   <property name="logo" type="string"/>
   <many-to-one name="country" class="Country" column="country"/>
   <many-to-one name="language" class="Language" column="language"/>
   <many-to-one name="currency" class="Currency" column="currency"/>
   <property name="handlingFee" type="long"/>
   <property name="cancelDeadlinePlus" type="long"/>
   <set name="branchOffices" inverse="true" lazy="true" order-by="code" cascade="all">
      <cache usage="read-write"/>
       <key column="agency"/>
        <one-to-many class="BranchOffice"/>
    </set>   
</class>

org.xml.sax.SAXParseException: Element type "cache" must be declared.

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 2.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd">