21 March 2006 11:30
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RFC 3920 : Extensible Messaging and Presence Protocol (XMPP): Core - P. Saint-Andre, Ed. - Jabber Software Foundation - October 2004
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"This memo defines the core features of [XMPP], a protocol for streaming Extensible Markup Language (XML) elements in order to exchange structured information in close to real time between any two network endpoints".
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