Re: [Idna-update] Genart telechat review of draft-faltstrom-unicode11-08

"Asmus Freytag (c)" <> Tue, 19 March 2019 16:24 UTC

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From: "Asmus Freytag (c)" <>
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Date: Tue, 19 Mar 2019 09:24:16 -0700
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Subject: Re: [Idna-update] Genart telechat review of draft-faltstrom-unicode11-08
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On 3/19/2019 3:19 AM, Martin J. Dürst wrote:
> In the 6.0.0 timeframe, there were both more actual changes (3), and
> there was one change where we moved from PVALID to DISALLOWED, which I
> personally think is the tougher one (see
> And looking at the
> code chart at, one may even
> reasonably argue that keeping U+19DA NEW TAI LUE THAM DIGIT ONE would
> have been the better choice, because when one compares U+19B1 NEW TAI
> LUE VOWEL SIGN AA and U+19D1 NEW TAI LUE DIGIT ONE and finds them having
> (at least on first approximation) the same glyph shape, one can easily
> guess that U+19DA NEW TAI LUE THAM_DIGIT_  ONE is used (this is only a
> quick conjection which would have to be confirmed) exactly in situations
> where the distinction between letters and digits is important, of which
> we know domain names are a good example.

Here's a telling example of how a formal problem can be practically 

I looked up New Tai Lue on Omniglot:

"The new script is used exclusively in Jinghong, so could be called the
   New Jinghong Tai Lue script, and is used for shop and street signs.
*Fe**w people can read it*. "   (Emphasis mine).

If you read the full text you get the impression that the whole script
represents a failed state-imposed "simplification". Unicode still needs
to encode it, so that archival texts from the period between 1950 and 1980
can be encoded, but it's surely of no practical relevance for domain names.