setAction(builder.newURI(action));
// Read wsa:MessageID
// This OPTIONAL element (whose content is of type xs:anyURI) conveys the [message id] property.
String messageID = getOptionalHeaderContent(soapHeader, ADDR.getMessageIDQName());
if(messageID!=null) setMessageID(builder.newURI(messageID));
// Read wsa:RelatesTo
// This OPTIONAL attribute conveys the relationship type as an IRI.
// When absent, the implied value of this attribute is "http://www.w3.org/2005/08/addressing/reply".
Iterator itRelatesTo = DOMUtils.getChildElements(soapHeader, ADDR.getRelatesToQName());