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[Bug 23260] Make the dir attribute use isolation instead of embedding

From: <bugzilla@jessica.w3.org>
Date: Wed, 25 Sep 2013 06:28:30 +0000
To: public-i18n-bidi@w3.org
Message-ID: <bug-23260-3860-h81U8FdvPk@http.www.w3.org/Bugs/Public/>

--- Comment #10 from Richard Ishida <ishida@w3.org> ---
Ian, have you read http://www.w3.org/International/wiki/Html-bidi-isolation?

The main thing that has changed is that Unicode 6.3, which will be released in
a few days time, now recommends that isolation be the default for *all* future
inline bidirectional text embeddings, and that document summarises a discussion
that spanned several months about how best to achieve that.

We started, initially, by trying to make bdi work, but came upon a number of
problems - not least, how to ensure that isolation is henceforth always applied
(and in the simplest way) in all situations where people mark up their content
for direction. The solution of making dir isolate not only solves that problem,
but provides a useful fix for existing pages, and establishes consistency with
behaviours already in IE.

Making dir isolate also has the potential to significantly reduce the
complexity of markup for most situations. See
http://www.w3.org/International/articles/inline-bidi-markup/#whattodo, where
all the various rules for dealing with bidi in HTML4 and HTML5 when you know
the direction of the text can simply be reduced to "continue to use dir as you
always have". No need to learn about or remember to use new markup or RLM/LRM.

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