From ActivityPub Community Group
- Each user has an activity stream that represents their own activities.
- The streams come in two flavours: Activity Streams Atom or Activity Streams JSON.
- The streams can be discovered from an HTML profile page using <link> elements.
- rel="alternate feed", type="application/atom+xml"
- rel="alternate feed", type="application/stream+json"
- The streams can be discovered from a WebFinger or LRDD XRD document
- rel=activitypub-atom (???)
- rel=activitypub-json (???)
- You can HEAD a stream document, but it's probably not that interesting.
- If you GET a stream document, you can see the most recent activities by that account, in reverse-chronological order.
- If you GET a stream document using some kind of authentication, you might seem activities that are intended for private audiences.
- You can POST to a stream document, which will create a new activity that will show up in the stream document.
- You should post Atom activities to Atom feeds.
- You should post JSON activities to JSON feeds.