The real issue: interopability, and a proposal (Was: Consensus Call on Latin Sharp S and Greek Final Sigma)

[Harald Alvestrand]

Mark Davis ☕ wrote:
> My apologies to all. I had meant to write:
>
> To be complete, one would ban mapping not only of PVALID, but also of 
> *UNASSIGNED* (since those are in an indeterminate state, and could 
> become PVALID).
>
> Sorry for the confusion!
I would agree to that - it's actually quite hard to see what one would 
map an UNASSIGNED character to - after all, we have no idea what will 
eventually occupy the spot!

                Harald