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 [L1 ], RFC 3921 [L2 ] and http://www.xmpp.org/
RLH 2009-06-01: Does Tcl have anything library wise that talks xmpp?