From: Richard Wordingham (richard.wordingham@ntlworld.com)
Date: Wed May 28 2008 - 22:20:36 CDT
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.
Richard.
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