<wsdl:definitions
    targetNamespace="http://something.mydomain.com"
    xmlns:origin="http://something.mydomain.com/"
    xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/"
    xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/">

 <wsdl:binding name="ExampleBindingSoap" type="IExampleServiceEndpoint">
    <soap:binding style="document" transport="http://schemas.xmlsoap.org/soap/http" />
    <wsdl:operation name="MyAuthenticate">
      <soap:operation soapAction="/MyAuthenticate" />
      <wsdl:input>
        <soap:body use="literal" />
      </wsdl:input>
      <wsdl:output>
        <soap:body use="literal" />
      </wsdl:output>
    </wsdl:operation>
 </wsdl:binding>
</wsdl:definitions>