Modify SOAP Namespace for ABAP WS

Hi Experts,

I need to modify namespace on the web service, I have to provide this WS from an ABAP AS 7.0 SP10 (we don't have XI or PI infrastructure) but the request generated from SAP WSDL is like this:

<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:urn="urn:sap-com:document:sap:soap:functions:mc-style">

   <soap:Body>

      <urn:GetExAvailability>

      .....

     </urn:GetExAvailability>

is it possible to change this name space urn="urn:sap-com:document:sap:soap:functions:mc-style" and the prefix "urn" before "GetEx..."?

From Service Definition in the transaction SE80 the SOAP NameSpace is read only, but the customer that have to use this WS, use a request(that they can't modify) like this:

<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">

  <soap:Body>

    <GetExAvailability xmlns="http://www.aaaaaa.de/">

    .....

    </GetExAvailability>

Any help would be greatly appreciated.

Thanks!

Regards,

Max.