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Date:      Tue, 27 Sep 2016 03:36:49 +0000
From:      bugzilla-noreply@freebsd.org
To:        freebsd-standards@FreeBSD.org
Subject:   [Bug 213013] unicode private use chars incorrectly classified
Message-ID:  <bug-213013-15-Www2YAQUBK@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-213013-15@https.bugs.freebsd.org/bugzilla/>
References:  <bug-213013-15@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D213013

--- Comment #3 from Kurtis Rader <krader@skepticism.us> ---
Yes, you're missing something. The reason those code points are in the Arab=
ic
Presentation Forms code block is a historical accident. That is, contingent=
 on
the development of Unicode over many years. From the PDF standards document=
 I
linked to:

> In addition, there is a contiguous range of another 32 noncharacter code =
points in the BMP: U+FDD0..U+FDEF. For historical reasons, the range U+FDD0=
..U+FDEF is contained within the Arabic Presentation Forms-A block, but tho=
se noncharacters are not =E2=80=9CArabic noncharacters=E2=80=9D or =E2=80=
=9Cright-to-left noncharacters,=E2=80=9D and are not distinguished in any o=
ther way from the other noncharacters, except in their code point values.

They were reserved as private-use code points because they had not already =
been
assigned as characters (glyphs) and it was decided that another adding anot=
her
32 private use code points would be useful.

--=20
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