SOAP 1.1: http://www.w3.org/TR/SOAP/ SOAP 1.1 Attachments: http://www.w3.org/TR/SOAP-attachments SOAP 1.2 Part 0: http://www.w3.org/TR/soap12-part0/ SOAP 1.2 Part 1: http://www.w3.org/TR/soap12-part1/ SOAP 1.2 Part 2: http://www.w3.org/TR/soap12-part2/ SOAP 1.2 Attachment: http://www.w3.org/TR/2002/WD-soap12-af-20020814/ WSDL 1.1: http://www.w3.org/TR/wsdl.html XML Protocol Working Group: http://www.w3.org/2000/xp/Group/ XML 1.0: http://www.w3.org/TR/REC-xml XML Infoset: http://www.w3.org/TR/xml-infoset/ Microsoft related specs: http://msdn.microsoft.com/ IBM Web Services: http://www-106.ibm.com/developerworks/webservices/