I take that diagram to mean that events provide input to missions, not that missions are kinds of events. If the arrows in that diagram meant "is a kind of", then you'd have to say that History "is a kind of" Hero or that Events "are a kind of" Hook, right? but maybe the devs can confirm.
I'm categorizing types of fights so that I can maybe say sensible things about how many enemies you fight in them and consequences of victory or defeat and whatnot. The kinds of battles you end up in if you follow a hook opportunity and it ends up with someone fighting you are their own kind of thing, very different from assaults or defenses or ambushes. I could call them "Opportunity" battles, but I'm not sure if opportunities are the only way to get them. Devs could weigh in, I suppose.
- I had made that diagram. Think of it like this... missions can be a part of some events -- an arriveAtSite event type would have a mission as its outcome -- but events are not a part of a mission, and don't necessarily include a mission.
- There's no arrow between Hook and Event, they just share a relationship, where a specific hook can cause an event to happen. But again, an opportunity is not a type of mission, it's a type of event (or more specifically in the diagram, a personal upgrade quest which is a type of job). An opportunity's outcome doesn't necessarily require a mission, so we shouldn't blur the lines.
- (There wouldn't be any way to quantity the number of foes that might be in an opportunity's battle, because it would be dependent on the opportunity. Sometimes you fight a single foe, sometimes you fight many.) FeralKitty (talk) 22:38, 30 November 2019 (PST)