How can i validate a SOAP message with a WSDL file?

when we rec开发者_JAVA技巧eive a SOAP message, then we Resolve it, then we have a TEXT like:

<soap:Envelope>
        <soap:Body>
                <GetDNS>
                  <xx>1</xx>
                </GetDNS>
        </soap:Body>
</soap:Envelope>

how can i validate the para: xx . to check it's value is accord to the WSDL of the web service