@grishka so, I think that answers your question of where it goes: nowhere. The object remains, only the reference to it in the collection is removed. :D

Delete on an IRI transforms the object it refers to into a Tombstone, it does not remove it. That's why I think a Remove is needed for removing it from a collection.

Anyway, I think I'll stop pestering you with my feedback, mastodon is not the proper place for it. :D

If I ever get the time, I'll try to send you a better detailed document.