可扩展消息与存在协议：修订间差异

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 * [https://xmpp-servers.404.city Open list of public XMPP servers]
 * [https://web.archive.org/web/20171017022544/https://ulloo.net/ For your XMPP servers]
-* [http://wiki.xmpp.org/web/XMPP_Case_Studies XMPP Case Studies]{{Webarchive|url=https://archive.is/20130113111456/http://wiki.xmpp.org/web/XMPP_Case_Studies |date=2013-01-13 }}
+* [http://wiki.xmpp.org/web/XMPP_Case_Studies XMPP Case Studies]
 * [https://web.archive.org/web/20091024103254/http://xmpp.org/xsf/press/2004-10-04.shtml IETF Publishes XMPP RFCs]
 * [https://web.archive.org/web/20060819034447/http://www.jabber.org/ Jabber.org]