In section 4, "ActivityPub actors" is used as a term without a definition. "An ActivityPub object (as in section 3) with the required inbox and outbox properties" might be plenty, although it might also be worthwhile to describe the role of actors in the system architecture.
In section 4, "ActivityPub actors" is used as a term without a definition. "An ActivityPub object (as in section 3) with the required
inboxandoutboxproperties" might be plenty, although it might also be worthwhile to describe the role of actors in the system architecture.