Follow-up to Monday's discussion of digits

[Shawn Steele]

> > Outside of the protocol, registries are free to implement a
> > registry-local policy, which may restrict code points in a label to one
> > range only, or one of two ranges, where one is in the U+0030..U+0039
> > range, but not both of the ranges U+0660..U+0669 and U+06F0..U+06F9.

> Something that wasn't clear to me from the discussion yesterday is why
> this ought not just to be a registry policy issue, in the way we have
> said other possibly-confusing things ought to be.  Is the argument
>from potential for harm?

I seem to have missed the earlier discussion and couldn't quickly find it on the archives, but I agree that this seems similar to other confusables, shouldn't it just be a registry policy issue?  Perhaps a recommended behavior or UTR36 type issue?

- Shawn

Shawn Steele