The document provides an overview of XMPP (eXtensible Messaging and Presence Protocol), formerly known as Jabber. It discusses that XMPP is an open standard for real-time messaging that routes small snippets of XML between servers to allow users like Alice and Sister to exchange messages and presence information in real-time. The document also covers the history and development of XMPP, its archit
![XMPP 101](https://cdn-ak-scissors.b.st-hatena.com/image/square/176794a5992c84e4c6caa28ed8fca4f8a6424308/height=288;version=1;width=512/https%3A%2F%2Fcdn.slidesharecdn.com%2Fss_thumbnails%2Fxmpp101-key-090303164623-phpapp01-thumbnail.jpg%3Fwidth%3D640%26height%3D640%26fit%3Dbounds)