The SOAP 1.2 specification (formerly the Simple Object Access Protocol) became a W3C Recommendation in June 2003. SOAP 1.2 Part 0: Primer is published at http://www.w3.org/TR/soap12-part0/, SOAP 1.2 Part 1: Messaging Framework is published at http://www.w3.org/TR/soap12-part1/, and SOAP 1.2 Part 2: Adjuncts is published at http://www.w3.org/TR/soap12-part2/. SOAP Version 1.2 Specification Assertions and Test Collection, also a Recommendation, is published at http://www.w3.org/TR/soap12-testcollection.
SOAP is an XML-based protocol for exchanging information in a decentralized, distributed environment. It consists of three parts : an envelope that defines a framework for describing what is in a message and how to process it, a set of encoding rules for expressing instances of application-defined data types, and a convention for representing remote procedure calls and responses.
The RDF Model and Syntax Specification became a W3C Recommendation in February 1999, and it is published at http://www.w3.org/TR/REC-rdf-syntax/. The RDF Schema Specification became a W3C Candidate Recommendation in March 2000, and it is published at http://www.w3.org/TR/rdf-schema/.
More recently, a number of RDF Working Drafts revising those specs have been published. Resource Description Framework (RDF): Concepts and Abstract Syntax is published at http://www.w3.org/TR/rdf-concepts/. RDF Semantics is published at http://www.w3.org/TR/rdf-mt/. An RDF Primer is published at http://www.w3.org/TR/rdf-primer/. RDF Vocabulary Description Language 1.0: RDF Schema is published at http://www.w3.org/TR/rdf-schema. RDF/XML Syntax Specification (Revised) is published at http://www.w3.org/TR/rdf-syntax-grammar.
RDF is a foundation for using XML to process metadata. It provides interoperability between applications that exchange machine-understandable information on the Web. RDF emphasizes facilities that enable automated processing of web resources.