Simple Object Access Protocol <protocol> (SOAP) A minimal set of conventions for invoking {code} using {XML} over {HTTP}. {DevelopMentor}, {Microsoft Corporation}, and {UserLand Software} submitted SOAP to the {IETF} as an internal draft in December 1999. Latest version: SOAP 1.1 defined by {World Wide Web Consortium}. (http://w3.org/TR/SOAP/). (2000-01-08)