linked-tags can represent cycles, but is that always nonsense?

[deeglaze]

It doesn't make sense to have a cycle in supplements / replaces relationships, since they are apparently causally ordered.

Since $tag-rel-type-choice is extensible by profiles, do we say that only cycles involving supplements/replaces are invalid and leave the validity of cycles to a profile that extends the relationship enum to decide? Or just disallow cycles entirely?

[yogeshbdeshpande]

What is the meaning of cycles here? Can you please clarify ?

Does it mean pointing to itself or something else?

[deeglaze]

I mean the links form edges to documents as nodes. If there is a cycle in that graph, is that grounds for rejection?

[nedmsmith]

It's hard to get your mind around a legitimate use case that results in a cycle. I'm OK with languagee that rejects cycles until a use case is identified that needs it.