On Thu, Nov 22, 2012 at 11:35:36AM +0100, Hans Hagen wrote:
Hi Khaled
these virtual versions are essentially the body font counterparts with lots of display-modifying tweaks piled on to make them behave like math fonts. These virtual versions were used for a time while the math fonts were in development.
The virtual counterparts are adaptations of the old TFM/Type1 fonts so they look like OpenType math fonts to the engine (so that ConTeXt would move entirely to Unicode/OpenType math while waiting for the real OpenType fonts).
Which reminds me ... shouldn't we try to get the r2l math symbols into the lm/gyre fonts? I don't know how much extra that is in xits, but it would be nice to have it.
The stuff in XITS is of little value right now as does not even cover Arabic math (the only language where math can be RTL), there is a whole set of Arabic math alphabets (starting from U+1EE00) that need to be covered first to be able to set any useuful Arabic math (both LTR and RTL). Regards, Khaled