From: Doug Ewell (dewell@adelphia.net)
Date: Sat Nov 08 2003 - 17:47:53 EST
Philippe Verdy <verdy underscore p at wanadoo dot fr> wrote:
> OK but you probably did not notice that the Corrigendum #1, published
> after Unicode 4.0, refers to a backward version of ISO/IEC
> 10646-1:2000, which is not the version ISO/IEC 10646:2003 refered in
> Unicode 4.0. This added reference in the Corrigendum (not in the first
> publication of Unicode 4.0) is then confusive...
Are we looking at the same Corrigendum?
The Unicode Character Database for version 4.0.0:
http://www.unicode.org/Public/UNIDATA/UCD.html
is dated April 18, 2003.
This is the same day that Mark Davis sent out an e-mail:
http://www.unicode.org/mail-arch/unicode-ml/y2003-m04/0229.html
formally announcing the "final release" of Unicode 4.0.
Other files in the Unicode database:
http://www.unicode.org/Public/UNIDATA/
are dated April 16 or 17 (except for Index.txt, Jamo.txt, and Unihan.txt
and .zip, which are dated March 27).
This establishes rather conclusively that Unicode 4.0 was officially
released, or "published," in mid-April 2003. The book, of course,
didn't become available until some months later.
Meanwhile, the Corrigendum located at:
http://www.unicode.org/versions/corrigendum1.html
has a "Last updated" date of March 5, 2003 -- and that just refers to
the last date *any* change was made to this HTML file (spelling
correction, broken link fixed, stylesheet changed). The actual
publication date of the Corrigendum could have been well before that.
But in the best case, this is before the mid-April publication of
Unicode 4.0.
And indeed, if you go back far enough, you will see that the Corrigendum
was originally written against Unicode 3.0.1, sometime between August
2000 and March 2001:
http://www.unicode.org/standard/versions/enumeratedversions.html#Unicode
_3_0_1_With_Corrigendum
The Corrigendum is not listed on the main "Updates and Errata" page at:
http://www.unicode.org/errata/index.html
except in the link on the sidebar at the left side of the page. (That
sidebar also includes links to the Standard Annexes defining Unicode 3.1
and 3.2, if you want to look at some more history.) The "Updates and
Errata" page includes a prominent note, at the very top, that all
updates prior to April 17, 2003 have been incorporated in Unicode 4.0.
So unless there is a different Corrigendum #1 floating around, it
appears that this whole premise that the Corrigendum was "published
after Unicode 4.0," was "not in the first publication of Unicode 4.0,"
and so on, and thereby raises interoperability problems because ISO/IEC
10646-1:2000 had not yet been amended to exclude code points beyond
U-0010FFFF, is completely false and misleading. There is no conflict,
no confusion, and no controversy.
-Doug Ewell
Fullerton, California
http://users.adelphia.net/~dewell/
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