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)