Simple Object Access Protocol (SOAP) 1.2 - W3C Working Draft 9 July 2001. SOAP version 1.2 is a lightweight protocol for exchange of information in a decentralized, distributed environment. It is an XML based protocol. www.w3.org/TR/soap12
SOAP Reference at Zvon - A complete reference which can be downloaded for off-line use. www.zvon.org/xxl/soapReference/Output
SOAP: Simple Object Access Protocol Specification - The Internet Draft is the speficification of SOAP, which defines an RPC mechanism using XML for client/server interaction across a network by using HTTP as the base transport and XML documents for encoding of invocation requests and responses. By D. Box, G. Kakivaya, , A. Layman, S. Thatte, and D. Winer. msdn.microsoft.com/xml/general/soapspec-v1.asp
XML Protocol (XMLP) Requirements - Describes the XML Protocol Working Group's requirements for the XML Protocol (XMLP) specification. www.w3.org/TR/xmlp-reqs