From: Peter Constable (petercon@microsoft.com)
Date: Wed Mar 24 2004 - 11:24:28 EST
> From: unicode-bounce@unicode.org [mailto:unicode-bounce@unicode.org]
On Behalf
> Of Peter Kirk
> It seems strangely inconsistent to me that Unicode has detailed
controls
> for horizontal layout direction and the complex bidi algorithm, but
has
> nothing for vertical layout.
The bidi embedding and overrides are needed to maintain legibility of
the text is certain situations. Orientation controls for CJK text are
not needed to ensure legibility. For instance, given an encoded sequence
< a, b, c, space, D, E, F >, it isn't clear whether it should appear as
abc FED
or
FED abc
This kind of problem does not arise in CJK text.
The orientation of CJK text is a presentation issue that is out of scope
for Unicode.
Peter
Peter Constable
Globalization Infrastructure and Font Technologies
Microsoft Windows Division
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