From: Philipp Reichmuth (email@example.com)
Date: Mon Oct 11 2004 - 10:24:55 CST
> Is there anywhere an exhaustive list of Japanese characters (especially
> Shift_JIS characters) which are not supported in Unicode ?
Are there any characters in Shift-JIS that are unrepresentable in
Unicode? Are any of these non-vendor-specific? (In this case, you'll
need a vendor-specific mapping table anyway).
I'm not sure about JIS X 0213 and compatibility ideographs.
You might take a look at
http://www.opengroup.or.jp/jvc/cde/ucs-conv-e.html, even though it's
probabaly outdated. Another interesting page might be
http://www.debian.or.jp/~kubota/unicode-symbols.html; this guy generally
seems to be a bit anti-Unicode.
There are some round-trip mapping problems with a small number of
characters due to ambiguities
in this case the problem is the conversion FROM unicode, meaning that
you can convert character X to character U(X) and back to J(U(X)), but
you cannot guarantee that J(U(X)) = X in a small number of cases. AFAIK
there are no "unsupported characters" on the back conversion, you might
just end up at a different codepoint.
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