Re: [I18nrp] Mappings for IDNA2008 ?

"Asmus Freytag (c)" <asmusf@ix.netcom.com> Tue, 05 February 2019 17:26 UTC

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To: John R Levine <johnl@taugh.com>
Cc: i18nrp@ietf.org
References: <20190205012457.700B3200DC241C@ary.qy> <5efb4980-920b-eb12-5d71-67e08f622809@ix.netcom.com> <alpine.OSX.2.21.1902051151010.35479@ary.qy> <29907a7d-ca86-164f-574d-2872cd2ff394@ix.netcom.com> <alpine.OSX.2.21.1902051207300.35479@ary.qy>
From: "Asmus Freytag (c)" <asmusf@ix.netcom.com>
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Date: Tue, 5 Feb 2019 09:26:31 -0800
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Subject: Re: [I18nrp] Mappings for IDNA2008 ?
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On 2/5/2019 9:09 AM, John R Levine wrote:
>> I wouldn't know anyone who would do this kind of work, and would be 
>> very surprised.
>
> Not astonished but I figured it can't hurt to ask.
>
>> Unicode's CLDR provides tailorings for some common issues like sorting.
>
> I've been looking at CLDR and as far as I can tell it doesn't describe 
> case folding.  Did I miss it or is it really not there?

Case __folding  __may be seen as universal, but case mapping has a few 
locale specific tweaks (very few).

The FAQ states:


"To make case mapping language sensitive, the Unicode Standard 
specificially allows—but does not provide the necessary 
data—implementations to tailor the mappings for each language. The file 
SpecialCasing.txt 
<ftp://ftp.unicode.org/Public/UCD/latest/ucd/SpecialCasing.txt> is 
included in the Standard as a guide to a few of the more important 
individual character mappings needed for specific languages, notably the 
Greek script and the Turkic languages. However, for most 
language-specific mappings and tailoring, users should refer to CLDR 
<http://cldr.unicode.org> and other resources."

So you'd expect to find some data in CLDR.

A./