AH..! here comes the networks #federation magic
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Technically, how does the federation work?

We are using the OStatus suite of protocols:

Webfinger for user-on-domain lookup
Atom feeds with ActivityStreams, Portable Contacts, Threads extensions for the actual content
PubSubHubbub for subscribing to Atom feeds
Salmon for delivering certain items from the Atom feeds to interested parties such as the mentioned user, author of the status being replied to, person being followed, etc
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#fediverse - federation + universe ?

 #OStatus