From: Peter Kirk (peter.r.kirk@ntlworld.com)
Date: Tue Aug 05 2003 - 17:50:09 EDT
On 05/08/2003 14:40, Mark Davis wrote:
>Where did you get the notion that space is not a base character? And
>base characters include those that are not control or format
>characters. Space is neither one.
>
>The standard specifically states in a number of places that to exhibit
>a combining mark in isolation you use a space (or NBSP).
>
>Mark
>__________________________________
>http://www.macchiato.com
>► “Eppur si muove” ◄
>
>
>
I got this from the Unicode Standard 4.0, as quoted by Jim Allan:
> In http://www.unicode.org/book/preview/ch03.pdf the space characters
> in general are given class Zs:
>
> << Zs, Zl, and Zp are considered format characters, but their
> membership in the Z (separator) class takes precedence over their
> membership in the Cf class, because the General Category assigns only
> a single value to each character. >>
>
> So the various space characters (class Zs) are also classified as
> format characters.
>
> From http://www.unicode.org/book/ch04.pdf:
>
> << _D13 Base character:_ a character that does not graphically
> combine with preceding character, and that is neither control nor a
> format character. >>
>
> Accordingly, by definition, spaces are not base characters.
-- Peter Kirk peter.r.kirk@ntlworld.com http://web.onetel.net.uk/~peterkirk/
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