From: Kenneth Whistler (kenw@sybase.com)
Date: Thu Apr 22 2004 - 16:45:14 EDT
John Fiscella said:
> The double line (shorter than a strikeout) could also be encoded as a
> combining or enclosing mark in the 20D Block. Then all new currency symbols
> dreamed up of this form could be text-represented
> by a composite character.
^^^^^^^^^^^^^^^^^^^
combining character sequence
Yes, except then this would introduce potential equivalencing issues
for existing signs with the double bar overlay, including the
EURO SIGN. That headache is not worth the avoidance of occasionally
encoding newly cooked up currency signs.
In general, the consensus seems to be that body modification
diacritics for letters are better handled by simply just
encoding the units, rather than treating overlay diacritics
as productive for combining character sequences. See, for
example, the recent acceptance of a set of 11 phonetic symbols
with middle tilde: U+1D6C..U+1D76. These will *not* be
canonical equivalences to the base letters plus U+0334, because
of normalization stability guarantees. You'd have the inverse
problem with existing forms with double bar overlays if
any combining double bar overlay character were added to the
standard.
--Ken
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