<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ns="http://foo.com/"
xmlns:bar="http://bar.com/">
   <soapenv:Header/>
   <soapenv:Body>
         <ns:Req>
            <ns:Form>
              <bar:a>2</bar:a>
            </ns:Form>
         </ns:Req>
   </soapenv:Body>
</soapenv:Envelope>