On 24/03/2004 08:24, Peter Constable wrote:
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
    
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.

  
Well, surely there is at least in principle an ambiguity between

    D
abc E
    F


and

abc

 D
 E
 F



-- 
Peter Kirk
[EMAIL PROTECTED] (personal)
[EMAIL PROTECTED] (work)
http://www.qaya.org/

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