RTL/LTR directional tags

Salam,

I am trying to use Docbook XSLT chain for Arabic documents. The problem
I am having is that I can't seem to figure out where (if any) I can set
directional tags. 

As you may know, Arabic is a RTL language.. and I expected to find what
HTML provides, in DocBook (but I'm wrong?).

P.S. Please Cc' our '' list in your responses.

Regards
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