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Re: [I18ndir] [art] Fwd: New Version Notification for draft-bray-unichars-04.txt

"Manger, James" <James.H.Manger@team.telstra.com> Tue, 19 September 2023 14:01 UTC

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From: "Manger, James" <James.H.Manger@team.telstra.com>
To: Tim Bray <tbray@textuality.com>
CC: ART Area <art@ietf.org>, "i18ndir@ietf.org" <i18ndir@ietf.org>
Thread-Topic: [art] Fwd: New Version Notification for draft-bray-unichars-04.txt
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Date: Tue, 19 Sep 2023 14:00:53 +0000
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Subject: Re: [I18ndir] [art] Fwd: New Version Notification for draft-bray-unichars-04.txt
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My core point is that *(%x0-10FFFF) in the context of characters is nothing like its simplicity suggests.

I think the following is a more accurate ABNF for the code point sequences that 16-bit code units can represent. I think this is closer to the repertoire of a logical JSON string.

unit16-points = *(scalar / trail-surrogate / 1*lead-surrogate scalar) [lead-surrogate]
scalar = %x0-D7FF / %xE000-10FFFF
lead-surrogate = %xD800-DBFF
trail-surrogate = %xDC00-DFFF

--
James Manger


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