Relevant links
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- [XEP-0134: XMPP Design Gudelines](http://xmpp.org/extensions/xep-0134.html)
- [XEP-0143: Guidelines for Authors of XMPP Extension Protocols](http://xmpp.org/extensions/xep-0143.html)
- [XEP-README](http://xmpp.org/extensions/xep-README.html)