<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"
               soap:encodingStyle="http://schemas.xmlsoap.org/soap/
                                  encoding/">
   <soap:Body>
      <soap:Fault>
         <faultcode>soap:MustUnderstand</faultcode>
         <faultstring>Mandatory Header error.</faultstring>
         <faultactor>http://www.wrox.com/heroes/endpoint.asp</faultactor>
         <detail>
            <w:source xmlns:w="http://www.wrox.com/">
               <module>endpoint.asp</module>
               <line>203</line>
            </w:source>
         </detail>
      </soap:Fault>
   </soap:Body>
</soap:Envelope>