Answering #[0] at https://github.com/nostr-protocol/nips/pull/220#issuecomment-1416557909:

> i find all this nref things a bit confusing and anti pattern for nostr. I think the document should be able to referenced by note1d and it's hex protocol id, and we should be able to see the edits, so a list of versions

We already do not reference public keys by their metadata event id, when that would have been sensible, right? I think it is the same with parameterized replaceable events.

I agree it feels weird to refer to something that is not an event, and also that it would be ideal to have a history of all edits a document has ever had, and specially to have a reference to the point in the entity history on which you are commenting (i.e. I make a comment today about a thing, tomorrow it changes to its opposite, my comment has its meaning inverted, not cool) -- but for this to work we would have to rely on relays keeping a ton of possibly very large events and we don't want that.

I think the solution is for the comment to tag both the "ref" (i.e. combination of pubkey, kind and "d" tag) and the event id -- and while doing that, if possible, also push that exact event (i.e. the "ref" at that point in time) to a special archive relay that will not delete that event or overwrite it -- so others can then later fetch the event at the specific date.