Re: [DNSOP] draft-liman-tld-names-04

[Masataka Ohta <[e-mail]>]

Tony Finch wrote:

> It describes the current
> No distinction is made between upper and lower case.

How can you define upper case of 'y' with diaeresis' in Dutch
context where

   http://en.wikipedia.org/wiki/IJ_%28digraph%29
   (lowercase y with diaeresis), ij and Y, IJ are identical.

?

Note that upper case of 'y' with diaeresis' is not 'Y' with
diaeresis but plain 'Y' without diaeresis, because, unlike 'i'
and 'j', 'I' and 'J' do not have a dot in their character
shapes.

> In order to accommodate the wish to express TLD names in scripts
> other than the ASCII subset of Latin, it is necessary to allow
> non-alphabetic characters in the corresponding TLD DNS-Labels.

The example above is using only alphabetic Latin characters.

> Following past practice, the U-label form of a TLD name is
> restricted by applying rules analogous to those already
> imposed on ASCII TLD DNS-Labels.

So, how can you define upper case of 'y' with diaeresis' in
Dutch context?

And, beyond Latin, how can you define similar equivalence,
which is necessary for TLD registration operation, of extended
case insensitivities?

						Masataka Ohta