[idn] Unicode tagging

["Edmon" <edmon@neteka.com>]

>
> > As the information density per octet depends on the encoding used, I
> > do not think we can have this as a measurement. And you are right
> > that the number of characters is not correct either, one character in
> > Chineese can be a whole word. But one example of being fair is that
> > if 63 characters are allowed using ASCII, 63 characters must also be
> > allowed using ISO 8859-1 (or other latinbased character sets).
> > When we use UTF-8, the protocol will have space for more ASCII
characters
> > than ISO 8859-1 characters. To be fair, ASCII must still be restricted
> > to 63 characters even if the protocol have space for more.
> > This restriction is also very important for implementors.
>
> I dont think arbitrary restrictions are good at any machine level.  The
only
> arbitrary restrictions should be made through registry policies.
> Technically, names should be verified to be non-existent only after
> searching through the DNS.
>
> >
> >    Dan
> >
>