https://app.kbone.net/vault/rfc/docid/5299
RFC4854: A Uniform Resource Name (URN) Namespace for Extensions to the Extensible Messaging and Presence Protocol (XMPP)
Network Working Group P. Saint-Andre Request for Comments: 4854 XSF Category: Informational April 2007 A Uniform Resource Name (URN) Namespace for Extensions to...