Whenever you have questions about these sorts of issues, make very sure that you
consult the latest version of the Unicode standard, in this case, 4.0.1
<http://www.unicode.org/versions/Unicode4.0.1/>

You will find there the following -- much more explicit -- text, that amends the
text from 4.0:

D13a Graphic character: A character with the General Categories of Letter (L),
Combining Mark (M), Number (N), Punctuation (P), Symbol (S), or Space Separator
(Zs).
...
D13b Base character: Any graphic character except for those with the General
Category of Combining Mark (M).

Mark
__________________________________
http://www.macchiato.com
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----- Original Message ----- 
From: "Theo Veenker" <[EMAIL PROTECTED]>
To: "unicode" <[EMAIL PROTECTED]>
Sent: Thu, 2004 Jun 10 07:05
Subject: base character


> According to the definition a base character is:
>
>    "A character that does not graphically combine with
>    preceding characters, and that is neither a control
>    nor a format character."
>
> What is this expressed in terms of properties?
> Something like this? cc==0 AND GG!=Cc AND GC!=Cf AND GC!=Cn
>
> Theo
>
>
>


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