* [Account Basics](help/Account-Basics)
* [New User Quick Start](help/Quick-Start-guide)
* [Creating posts](help/Text_editor)
- * [BBCode tag reference](help/BBCode)
+ * [BBCode tag reference](help/BBCode)
* [Comment, sort and delete posts](help/Text_comment)
* [Profiles](help/Profiles)
* [Accesskey reference](help/Accesskeys)
- * [Events](help/events)
+ * [Events](help/events)
* You and other users
* [Connectors](help/Connectors)
* [Making Friends](help/Making-Friends)
* [Plugin Development](help/Plugins)
* [Theme Development](help/themes)
* [Smarty 3 Templates](help/smarty3-templates)
-* [Message Flow](help/Message-Flow)
+* [Protocol Documentation](help/Protocol)
* [Database schema documantation](help/database)
* [Class Autoloading](help/autoloader)
* [Code - Reference(Doxygen generated - sets cookies)](doc/html/)
--- /dev/null
+Used Protocols
+===============
+
+Friendicas DFRN Protocol
+---
+
+* [Document with the DFRN specification](spec/dfrn2.pdf)
+* [Schema of the contact request process](spec/dfrn2_contact_request.png)
+* [Schema of the contact request confirmation](spec/dfrn2_contact_confirmation.png)
+* [Description of the message flow](help/Message-Flow)
+
+ActivityStreams
+---
+
+Friendica is using ActivityStreams in version 1.0 for its activities and object types. Additional types are using for non standard activities.
+
+* [Link to the specification](http://activitystrea.ms/head/activity-schema.html)
+* [List of used ActivityStreams verbs and object types.](https://github.com/friendica/friendica/wiki/ActivityStreams)
+
+Salmon
+---
+
+Salmon is used as a message exchange protocol for replies and mentions.
+
+* [Link to the protocol summary](http://www.salmon-protocol.org/salmon-protocol-summary)
+
+Portable Contacts
+---
+
+Portable Contacts is used for friends lists.
+
+* [Link to the specification](https://web.archive.org/web/20160426223008/http://portablecontacts.net/draft-spec.html) (Link to archive.org)
+
+pubsubhubbub
+---
+
+pubsubhubbub is used for OStatus.
+
+* [Link to the specification](https://pubsubhubbub.github.io/PubSubHubbub/pubsubhubbub-core-0.4.html)
* [Plugin Development](help/Plugins)
* [Theme Development](help/themes)
* [Smarty 3 Templates](help/smarty3-templates)
-* [Nachrichtenfluss](help/Message-Flow)
+* [Protokoll Dokumentation](help/Protocol) (EN)
* [Datenbank-Schema](help/database)
* [Code-Referenz (mit doxygen generiert - setzt Cookies)](doc/html/)
* [Twitter/GNU Social API Functions](help/api) (EN)