Allow me to follow certain types of models, not just people through ActivityPub

[jernst]

E.g. I might be interested in ...

• printable toys for 1st graders
• Star Wars figurines
• enclosures for ESP32s
• things that are known to print on the particular printer I have
• ...

It's probably a more useful use case than following specific people.

How to map this into the ActivityPub Actor model is not entirely clear to me, and I'm not aware of existing conventions. But other domains could use such conventions, too, say I want to follow all news about Ukraine on a news site, not necessarily any particular reporter.

[Floppy]

This is probably akin to following tags; I need to look up the current state of the art on that.