dir attribute in HTML 5

Hi all,

I had a look at
http://www.w3.org/TR/2008/WD-html5-20080122/#the-dir
were it says
"The processing of this attribute depends on the presentation layer. For 
example, CSS 2.1 defines a mapping from this attribute to the CSS 
'direction' and 'unicode-bidi' properties, and defines rendering in 
terms of those properties."
This is quite different to HTML 4
http://www.w3.org/TR/REC-html40/struct/dirlang.html#adef-dir
which contains references for implementers of the Unicode BIDI 
algorithm, or ITS
http://www.w3.org/TR/its/#directionality-definition
which points to CSS 2.1 definitions not "For example", but recommends to 
use these.

I would propose to make a comment on HTML 5 that they should follow the 
ITS approach, that is to be more specific about the required semantics 
and recommend CSS 2.1

Any thoughts?

Felix