Edge best practises re updating

Thanks @ahsan
I just need to understand the last use case a bit more (everything else is 100% clear, thanks!)

re

       uid(u) <follows> uid(f) (since=2020-07-11) .

let’s say w have an updated (date) facet too. Can this be integrated into your example, so it can be read/set? So lets say since is not to be updated (if exists) and updated is.

(incomplete/invalid mutation to help clarify question)

      uid(u) <follows> uid(f) (since=val(some_facet_var??), updated=2020-07-11) .