[luatex] Vital RTL issues in LuaTeX

وفا خلیقی vafakh9 at gmail.com
Fri Apr 10 14:12:42 CEST 2009

> Bidi algorithm is certainly not perfect but it handles most cases correctly
> and it gives you the possibility to force a given directional behaviour, if
> needed.
> The BIG advantage of the bidi algorithm is that it is a standard. Every
> piece of software will represent the same Unicode string in the same way.
> For example, if you keyboard your text using a bidi-compatible text editor,
> then you will get the same output as what you'll see on your screen. And
> once you get used to the behaviour of text with respect to the five bidi
> special characters, then you can keyboard RTL languages in the same way
> everywhere. That's an improvement to previous input methods.
> I'm convinced that it is a good thing to implement bidi, *but* it may not
> be trivial since bidi needs information coming from higher-level protocols
> about the main direction in the context of the document. For example, in the
> case of XHTML you have a dir attribute. Here is the correponding text:

Thanks for the information. I agree.

BTW: Donald Knuth has told me  a lot about you and your knowledge and I feel
very lucky to have you here on this list.
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