An acronym for eXtensible Messaging and Presence Protocol This is the generalized XML streaming protocol that underlies Jabber (and the newly hyped 'Google Wave').

See RFC 3920 [1], RFC 3921 [2] and http://www.xmpp.org/

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RLH 2009-06-01: Does Tcl have anything library wise that talks xmpp?

PT 2009-06-03: The coccinella jabber application has provided its underlying jabber library jabberlib as an independent module for a number of years. This is also used by tkchat. The tkabber developers have produced a client access library called tclxmpp which can be obtained from [3]. Earlier versions of tkabber used a forked version of jabberlib but since about 0.11 it has switched library to tclxmpp. New projects should probably use this library.

There is also a server-side daemon called tclxmppd.

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DKF: XMPP can also be used as a transport protocol for SOAP, which is helpful for when you have long-lived webservice communications between two parties (especially when one party doesn't want to open incoming ports in their firewall).

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