Re: JIS X 0208 mappings in Unihan.txt

From: Erik van der Poel (erik@vanderpoel.org)
Date: Wed Jun 01 2005 - 13:56:39 CDT

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    Theo Veenker wrote:
    > In Unihan.txt I see only the 1990 mappings for JIS X 0208.
    > But ISO-2022-JP-[12] also use JIS X 0208-1978 and JIS X 0208-1983.
    > Are the later dated versions of this character set supersets
    > of the earlier versions? Does anyone know where to find the 1978
    > and 1983 mapping tables?

    I believe the official source of info for JIS X 0208 is the Japanese
    Standards Association (JSA):

    http://www.jsa.or.jp/

    Ken Lunde explains many (all?) of the differences between the 78, 83 and
    90 versions in his book CJKV Information Processing. Some of this info
    is also available online:

    http://examples.oreilly.com/cjkvinfo/AppQ/

    Unihan.txt contains normative mappings for JIS X 0208-1990 under the
    kIRG_JSource tag. I do not know of any mapping tables for the 78 and 83
    versions. Some (most?) implementations simply make them equivalent to
    the 90 version. See the Background Information section of the RFC 1468:

    http://ietf.org/rfc/rfc1468.txt

    Erik

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