ocap meets activitypub objects/actors

README.org

@@ -1080,16 +1080,99 @@ for human viewing.
 
 *** Ocaps meet ActivityPub objects/actors
 
+Finally we can get to the point of understanding how to apply ocaps to
+ActivityPub directly.
+It's actually extremely trivial: we can just use traditional capability
+URLs or bearcaps anywhere we would put a normal link.
+
+Let's start with a simple capability URL example.
+(We're intentionally pairing down this example; signatures are
+not shown.)
+
+#+BEGIN_SRC javascript
+  {"@type": "Create",
+   "actor": "https://chatty.example/ben/",
+   "to": ["https://chatty.example/ben/followers"],
+   "object": {
+     "@id": "https://chatty.example/obj/fQFWD9bZf1GKc3E09gt8W4MlChVxoiMAjgzhqxP9KhE",
+     "@type": "Note",
+     "attributedTo": "https://chatty.example/ben/",
+     "content": "Hello, fediverse!  I'm new here.  Who should I be chatting with?"}}
+#+END_SRC
+
+There is no way to retrieve this object unless you know its address,
+but knowing its address allows you to see/refer to it, not unlike the
+Google Docs example we referred to earlier.
+Ben distributes this message to his local friend group of Alyssa and
+Lem.
+
+Alyssa thinks that Ben would like to meet her friends and composes
+a reply which refers to his message.
+
+#+BEGIN_SRC javascript
+  {"@type": "Create",
+   "actor": "https://social.example/alyssa/",
+   "to": ["https://social.example/alyssa/collections/my-friends"],
+   "object": {
+     "@id": "https://social.example/obj/Aj1k_Phx4uAgCXOMZ7KP9omJXXnOUySlhP-WXYE0obw",
+     "@type": "Note",
+     "attributedTo": "https://social.example/alyssa/",
+     "inReplyTo": "https://chatty.example/obj/fQFWD9bZf1GKc3E09gt8W4MlChVxoiMAjgzhqxP9KhE",
+     "content": "Hey Ben!!  Welcome to the network.  I want to introduce you to my friends."}}
+#+END_SRC
+
+In the former message, Ben shared his message amongst his followers
+(which maybe he curates).
+In the latter message, Alyssa sent her message, which also provided
+a path to Ben's, amongst her friends, encouraging people she knows
+to establish a social connection with Ben.
+Alyssa and Ben were able to coordinate to spread this communication
+amongst people they trust, but it is not spread further.
+
+This is mildly interesting, but things get much more interesting when
+we realize that inboxes can also themselves be capabilities.
+
+Alyssa is a member of a group of pixel art enthusiasts.
+
+#+BEGIN_SRC javascript
+  {"@type": "Group",
+   "@id": "bear:?u=https://groupchats.example/group&t=eQshu8RiJ-9ozh2GKRATXN5-J6dcBVf_AYSMrJ6UEzE",
+   "url": "https://groupchats.example/group/public/pixel-artists",
+   "name": "Pixel Art Enthusiasts",
+   "inbox": "bear:?u=https://groupchats.example/group/inbox&t=eQshu8RiJ-9ozh2GKRATXN5-J6dcBVf_AYSMrJ6UEzE"}
+#+END_SRC
+
+This pixel art enthusiast group has a public page that anyone can
+view at =https://groupchats.example/group/public/pixel-artists=.
+However, not everyone who can see that URL has the authority to
+post to the group.
+At present, Alyssa has the authority to make posts to this group,
+which automatically disseminates them to all members.
+However, Alyssa cannot moderate the group (including its membership
+list).
+She has limited access.
+
+We will worry about how the limited access is accomplished in a
+moment, but for the moment we can say that Alyssa posting to the
+group is as simple as referencing its =@id=:
+
+#+BEGIN_SRC javascript
+
+#+END_SRC
+
 
 
 ** The power of proxying
 
+
 ** True names, public profiles, private profiles
 
 ** Rights amplification and group-style permissions
 
 ** MultiBox vs sharedInbox
 
+** Requested policies
+
 * Limitations
 
 * Future work