reqEnv.declareNamespace("http://soapinterop.org/", "tns");
reqEnv.declareNamespace("http://soapinterop.org/xsd", "s");
reqEnv.declareNamespace("http://schemas.xmlsoap.org/wsdl/", "wsdl");
reqEnv.declareNamespace("http://www.w3.org/2001/XMLSchema-instance","xsi");
SOAPHeader header = omfactory.createSOAPHeader(reqEnv);
OMNamespace ns = header.declareNamespace("http://soapinterop.org/xsd", "ns0");
header.addAttribute("soapenv:encodingStyle", "http://schemas.xmlsoap.org/soap/encoding/", null);
SOAPHeaderBlock blk1 = header.addHeaderBlock("Header1", ns);
OMElement h1Value1 = omfactory.createOMElement("string", ns);
h1Value1.addChild(omfactory.createText("String at header1"));