From: Behnam (firstname.lastname@example.org)
Date: Thu May 29 2008 - 07:14:14 CDT
On 28-May-08, at 11:20 PM, Richard Wordingham wrote:
> Douglas Davidson wrote on Wednesday, May 28, 2008 at 6:06 PM
>> The alternative mechanism for representing this in plain text
>> would be to insert a bidirectional control character, either RLM
>> or LRM, at the beginning of each directionally marked paragraph.
>> These characters are not specifically marks of paragraph base
>> writing directionality, but their presence at the beginning of a
>> paragraph would be sufficient to indicate it. However, this is
>> not the mechanism currently used in the case you mention.
> They don't quite work. The problem comes with a string of neutrals
> between a strong LTR and a strong RTL character. Their ordering
> may depend on the directionality of the paragraph, which may depend
> on a 'higher level' protocol (e.g. 'always left-to-right').
> Initial RLM and LRM work if one is free of such a higher level
> protocol; otherwise one has to stick these marks in whenever
> neutrals are not bracketed by characters of the same directionality.
Now that we are on to things that don't work, I should mention that
unlike rtl, language identification to the paragraph doesn't work
either. It should only be applied to a string of characters. A
paragraph my contain several languages.
I don't know if this simplifies or complicates the situation but
there it goes!
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