RE: Unicode progress

[dank@blacks.jpl.nasa.gov]

Masataka,
you write
>That problem of Unicode is technical, not political.
>Just as characters in Greek and English are different, characters in
>Japanese and Chinese are different and should be assigned different
>code points, if we need to use Unicode without furthur specification.

It seems to me that English and Greek characters need separate code points
because their visual appearance is significantly different, not because
they are from different languages.
Do characters from different languages that have identical appearances
need separate code-points?  If so, why?  For sorting purposes?  For
equality comparison?
- Dan Kegel (dank@blacks.jpl.nasa.gov)