Re: [I18ndir] [art] Modern Network Unicode

"Asmus Freytag (c)" <asmusf@ix.netcom.com> Thu, 11 July 2019 15:51 UTC

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To: Carsten Bormann <cabo@tzi.org>
Cc: i18ndir@ietf.org
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From: "Asmus Freytag (c)" <asmusf@ix.netcom.com>
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Date: Thu, 11 Jul 2019 08:51:25 -0700
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Subject: Re: [I18ndir] [art] Modern Network Unicode
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On 7/11/2019 12:03 AM, Carsten Bormann wrote:
> On Jul 11, 2019, at 01:00, Asmus Freytag <asmusf@ix.netcom.com>; wrote:
>> There are a few scripts where un-normalized text is "preferred" by the user community over NFC. In some cases, the most natural ordering of combining marks does not match NFC's canonical ordering. I other cases, NFC does not compose some sequences while local user communities strongly prefer the precomposed code points (e.g. Bengali).
> Interesting.  There are also a few writing systems where NFC is what is strongly preferred by the user community.
>
> Is there any effort to capture these preferences in a formal way so they become more accessible to international developer communities?

No. Note least because these preferences may not be stable over 
(longish) periods of time as they depend a bit on what keyboards / 
rendering platforms and apps handle best today.

A./

>
>> Those scripts would be an exception to John’s statement: " NFC is also a close approximation to what any sensible terminal driver or IME is going to produce natively from a plausible keyboard layout for the relevant script", a statement that otherwise holds well.
> Right.  It is interesting to see how Apple recently moved from a normalizing file system (HFS+ was normalizing [to NFD unfortunately, and using UTF-16 on disk]) to a normalization-preserving, normalize-before-comparison (“normalization-insensitive”) file system (APFS).  It is also interesting how the problem is “solved” in applications such as git (core.precomposeunicode needs to be set to true on platforms that tend to generate non-NFC names so other platforms can pretend to stay blissfully unaware).
>
> Grüße, Carsten
>