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Re: [I18nrp] Mappings for IDNA2008 ?

Patrik Fältström <paf@frobbit.se> Wed, 13 February 2019 08:25 UTC

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From: Patrik Fältström <paf@frobbit.se>
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Date: Wed, 13 Feb 2019 09:25:38 +0100
Cc: "\"Martin J. Dürst\"" <duerst@it.aoyama.ac.jp>, Patrik Fältström <paf=40frobbit.se@dmarc.ietf.org>, "i18nrp@ietf.org" <i18nrp@ietf.org>
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To: "Asmus Freytag (c)" <asmusf@ix.netcom.com>
Archived-At: <https://mailarchive.ietf.org/arch/msg/i18nrp/8WniNOcpSh7iMd2VyPpAfZuj8Hg>
Subject: Re: [I18nrp] Mappings for IDNA2008 ?
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> On 13 Feb 2019, at 09:19, Asmus Freytag (c) <asmusf@ix.netcom.com> wrote:
> 
>> On 2/12/2019 11:46 PM, Patrik Fältström wrote:
>> 
>>> On 13 Feb 2019, at 08:18, Martin J. Dürst <duerst@it.aoyama.ac.jp> wrote:
>>> 
>>> If f(x) is the generic mapping, and f'(x) is the mapping of the 
>>> exceptions, then f(f'(x)), which applies f' *before* f, should do the job.
>> This works in some cases and not in other cases.
> Examples?

This is math. :-)

If f(x)=x’ and in the locale used f(x) should be x and not x’, you have dependencies between f(x) and f’(x) if you want f(f’(x)) to be x’ and f(f”(x)) to be x.

   Patrik
>>  All depending on what the functions do. Sure, might be able to find f’(x) that works in Turkish, or French or German, but it also sets a requirement on f(x).
>> 
>> But this is what I mean by the need for whatever see a string the first time should do mapping according to locale and after that just validation that strings are valid.
>> 
>>    Patrik
>> 
>> 
>> 
>

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