AddressingVersion.W3C.nsUri);
//write wsa:Address
writer.writeStartElement(AddressingVersion.W3C.getPrefix(),
AddressingVersion.W3C.eprType.address
, AddressingVersion.W3C.nsUri);
writer.writeCharacters(msEpr.addr.uri);
writer.writeEndElement();
//TODO: write extension attributes on wsa:Address
if ((msEpr.referenceProperties != null && msEpr.referenceProperties.elements.size() > 0) ||
(msEpr.referenceParameters != null && msEpr.referenceParameters.elements.size() > 0)) {