Re: what is the real problem?

>> not quite - all that is required is that there be one address that is
>> transcribable by any potential recipient.  but for me it's an open
>> question as to whether a Latin alphabet / ASCII-encoded fallback is
>> sufficient, given the absence of those characters on many of the
>> world's keyboards.
>
> If you can't count on Basic Latin, I very much doubt that there is
> anything you can count on.

digit strings.  no, I don't like that idea, and I'm rather hoping that 
a Latin fallback is sufficient.  but I can easily imagine situations 
where it might not be sufficient.

Keith