User Interface Protocol (XUP) a SOAP-based UI protocol SOAPjr a hybrid of SOAP and JSON-RPC WebSocket Web Services Security WS-Security based products and services References Further reading Benoît Marchal, "Soapbox: Why I'm using SOAP", IBM Uche Ogbuji, "Tutorial: XML messaging with SOAP", Principal Consultant, Fourthought, Inc. External links W3C SOAP page SOAP Version 1.2 specification Create SOAP Message in Java Application layer protocols Remote procedure call World Wide Web Consortium standards XML-based standards