On Sat, 7 Oct 2000, Markus Kuhn wrote:
> In the -misc-fixed-* fonts, all these characters would then be
> represented as an empty space glyph, such that they remain invisible if
> treated like an overstriking combining character.
>
> Read section 13.2 of The Unicode Standard 3.0 for the semantics and for
> application examples of these characters.
>
> Comments and opinions?
I agree with the idea. What about other characters of class Cf? Those are:
U+070F SYRIAC ABBREVIATION MARK
U+180B MONGOLIAN FREE VARIATION SELECTOR ONE
U+180C MONGOLIAN FREE VARIATION SELECTOR TWO
U+180D MONGOLIAN FREE VARIATION SELECTOR THREE
U+180E MONGOLIAN VOWEL SEPARATOR
They seem to be in the same general category of ZWJ and ZWNJ. Take a look
at pages 200 and 291 of TUS 3.0:
"U+070F SYRIAC ABBREVIATION MARK (SAM) is a user-selectable
zero-width formatting code..."
"...these characters normally have no visual appearance. Their
sole purpose is to guide the rendering process in selecting the
appropriate glyphs to represent base Mongolian letters in a
particular context."
There are also these in Cf that I don't know how may one chose to handle.
They are somehow control characters:
U+206A INHIBIT SYMMETRIC SWAPPING
U+206B ACTIVATE SYMMETRIC SWAPPING
U+206C INHIBIT ARABIC FORM SHAPING
U+206D ACTIVATE ARABIC FORM SHAPING
U+206E NATIONAL DIGIT SHAPES
U+206F NOMINAL DIGIT SHAPES
U+FFF9 INTERLINEAR ANNOTATION ANCHOR
U+FFFA INTERLINEAR ANNOTATION SEPARATOR
U+FFFB NTERLINEAR ANNOTATION TERMINATOR
--roozbeh
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Linux-UTF8: i18n of Linux on all levels
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