Specs and RFCs used
===================

* [OStatus](https://www.w3.org/community/ostatus/wiki/images/9/93/OStatus_1.0_Draft_2.pdf)  
  Suite of federation protocols
  * [Salmon](http://www.salmon-protocol.org/salmon-protocol-summary)  
    Delivery of targeted events to users
  * [Portable Contacts](https://web.archive.org/web/20160305010620/http://portablecontacts.net/draft-spec.html)  
    Encoding profile information in Atom
  * [Atom](https://tools.ietf.org/html/rfc4287)  
    Representing user feeds
  * [Atom ActivityStreams](http://activitystrea.ms/specs/atom/1.0/)  
    Encoding rich social post metadata
  * [Atom Threading](https://tools.ietf.org/html/rfc4685)  
    Encoding chains of conversations
  * [WebSub](https://pubsubhubbub.github.io/PubSubHubbub/pubsubhubbub-core-0.4.html) (formerly PubSubHubbub)  
    Broadcasting of real-time updates to followers
* [WebFinger](https://tools.ietf.org/html/rfc7033)  
  User-on-domain lookups
* [HTTP Signatures](https://tools.ietf.org/html/draft-cavage-http-signatures-06)  
  Server-to-server authentication of requests
* [ActivityPub](https://www.w3.org/TR/activitypub/)  
  Federation protocol