reqEnv.declareNamespace("http://www.w3.org/2001/XMLSchema", "xsd");
reqEnv.declareNamespace("http://schemas.xmlsoap.org/soap/encoding/", "SOAP-ENC");
reqEnv.declareNamespace("http://soapinterop.org/", "tns");
reqEnv.declareNamespace("http://soapinterop.org/xsd", "s");
reqEnv.declareNamespace("http://soapinterop.org/WSDLInteropTestRpcEnc", "tns");
reqEnv.declareNamespace("http://www.w3.org/2001/XMLSchema-instance", "xsi");
OMElement operation = omfactory
.createOMElement("echoVoid", "http://soapinterop.org/WSDLInteropTestRpcEnc", null);
reqEnv.getBody().addChild(operation);
operation.addAttribute("soapenv:encodingStyle", "http://schemas.xmlsoap.org/soap/encoding/",