Editing Message-oriented middleware (section)

=== XMPP ===
The eXtensible Messaging and Presence Protocol ([[XMPP]]) is a communications protocol for message-oriented middleware based on Extensible Markup Language ([[XML]]). Designed to be extensible, the protocol has also been used for publish-subscribe systems, signalling for VoIP, video, file transfer, gaming, Internet of Things applications such as the smart grid, and social networking services. Unlike most instant messaging protocols, XMPP is defined in an open standard and uses an open systems approach of development and application, by which anyone may implement an XMPP service and interoperate with other organizations' implementations. Because XMPP is an open protocol, implementations can be developed using any software license; although many server, client, and library implementations are distributed as free and [[open-source software]], many freeware and proprietary software implementations also exist. The Internet Engineering Task Force (IETF) formed an XMPP working group in 2002 to formalize the core protocols as an IETF instant messaging and presence technology. The XMPP Working group produced four specifications (RFC 3920, RFC 3921, RFC 3922, RFC 3923), which were approved as Proposed Standards in 2004. In 2011, RFC 3920 and RFC 3921 were superseded by RFC 6120 and RFC 6121 respectively, with RFC 6122 specifying the XMPP address format. In addition to these core protocols standardized at the IETF, the XMPP Standards Foundation (formerly Jabber Software Foundation) is active in developing open XMPP extensions. XMPP-based software is deployed widely across the Internet, according to the XMPP Standards Foundation, and forms the basis for the Department of Defense (DoD) Unified Capabilities Framework.<ref>[http://www.disa.mil/Services/Network-Services/UCCO/~/media/Files/DISA/Services/UCCO/UCR2013/01_Framework_2013.pdf] {{webarchive|url=https://web.archive.org/web/20130523040719/http://www.disa.mil/Services/Network-Services/UCCO/~/media/Files/DISA/Services/UCCO/UCR2013/01_Framework_2013.pdf|date=May 23, 2013}}</ref>

The [[Java EE]] programming environment provides a standard API called [[Java Message Service]] (JMS), which is implemented by most MOM vendors and aims to hide the particular MOM API implementations; however, JMS does not define the format of the messages that are exchanged, so JMS systems are not interoperable.

A similar effort is with the actively evolving [[OpenMAMA]] project, which aims to provide a common API, especially to C clients. As of August 2012, it is mainly appropriate for distributing market-oriented data (e.g. stock quotes) over pub-sub middleware.