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Unicode NFD and file attachment on Mac OS X

From: Jungshik Shin <jshin@i18nl10n.com>
Date: Tue, 28 Oct 2003 15:51:27 +0900 (KST)
To: w3c-i18n-ig@w3.org, www-international@w3.org
Message-ID: <Pine.LNX.4.58.0310281533580.2345@jshin.net>


Hi,

  While reading some articles posted at the Korean Mac user forum
(http://www.appleforum.org), I came across an interesting problem arising
from that Mac OS X uses Unicode NFD (Normalization Form D) for filename.

  What should a browser on Mac OS X do when attaching a file with its
name in NFD? Converting NFD to NFC at the time of submission  would be
conveninent for recipients who are likely to use non-MacOS X. If that's
desired, by whom, a web client on Mac OS X or a server-side application?
How about the security implication? How about the NFD -> NFC conversion
at the time of download or rendering?


  The following is not just a scenario but has been happening to Mac OS
X users.

  An 'Innocent' Mac OS X user attaches a file '가.txt' (U+AC00 in NFC
and <U+1100, U+1161> in NFD) only to hear a complaint from her friend
(a Windows user) that either a filename is 'mangled' or otherwise
not quire right.


  Jungshik
Received on Tuesday, 28 October 2003 01:51:37 GMT

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