رد: Wrong sequence for Arabic ligature marks(FC5E-FC62, FCF2-FCF4)

[Saeed Hubaishan]

But we have a problem with some program whom get thier data from unicode like "MediaWiki" and "phpBB" they reorder
لَّ
to
لَّ
with maybe rendered in some old windows fonts  like
لِّ

you can try this with wikipedia
________________________________
من: ‏‏Unicode <unicode-bounces at corp.unicode.org> بالنيابة عن Richard Wordingham via Unicode <unicode at corp.unicode.org>
‏‏تم الإرسال: 18 فبراير, 2022 10:48 م
إلى: unicode at corp.unicode.org <unicode at corp.unicode.org>
‏‏الموضوع: Re: Wrong sequence for Arabic ligature marks(FC5E-FC62, FCF2-FCF4)

On Fri, 18 Feb 2022 04:44:17 +0000
Saeed Hubaishan via Unicode <unicode at corp.unicode.org> wrote:

> Hi,
> "The Decomposition Type Mapping"  of these ligature marks are worng:
> FC5E     ‎ﱞ‎    Arabic Ligature Shadda With Dammatan Isolated Form
>                 ≈       <isolated> 0020 ␣ 064C ◌ٌ 0651 ◌ّ
> FC5F     ‎ﱟ‎    Arabic Ligature Shadda With Kasratan Isolated Form
>                 ≈       <isolated> 0020 ␣ 064D ◌ٍ 0651 ◌ّ
> FC60     ‎ﱠ‎    Arabic Ligature Shadda With Fatha Isolated Form
>                 ≈       <isolated> 0020 ␣ 064E ◌َ 0651 ◌ّ
> FC61     ‎ﱡ‎    Arabic Ligature Shadda With Damma Isolated Form
>                 ≈       <isolated> 0020 ␣ 064F ◌ُ 0651 ◌ّ
> FC62     ‎ﱢ‎    Arabic Ligature Shadda With Kasra Isolated Form
>                 ≈       <isolated> 0020 ␣ 0650 ◌ِ 0651 ◌ّ
>
> FCF2     ‎ﳲ‎    Arabic Ligature Shadda With Fatha Medial Form
>                 ≈       <medial> 0640 ‎ـ‎ 064E ◌َ 0651 ◌ّ
> FCF3     ‎ﳳ‎    Arabic Ligature Shadda With Damma Medial Form
>                 ≈       <medial> 0640 ‎ـ‎ 064F ◌ُ 0651 ◌ّ
> FCF4     ‎ﳴ‎    Arabic Ligature Shadda With Kasra Medial Form
>                 ≈       <medial> 0640 ‎ـ‎ 0650 ◌ِ 0651 ◌ّ
> Arabic Shadda must be before the marks (064C ◌ٌ ,064D ◌ٍ , 064E ◌َ ,
> 064F ◌ُ ,  0650 ◌ِ)

But they and shadda have different non-zero canonical combining classes
(ccc), so their order shall intend no difference.  Shadda has the higher
ccc, so it comes last.  Putting it last makes the decomposition table
easier to use for conversion to form NFKD.

Richard.


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