2008/8/13 Vasile Gaburici <vgaburici(a)gmail.com>:
The math script, aka MATH table, is a
MS extension to OpenType. MS has not yet officially submitted any
documentation for these math layout extensions -- and they are quite
extensive -- not even in the draft 1.5/1.6 OpenType spec. Despite
this, it is the de-facto OpenType math standard, and support for it
has appeared in FOSS projects.
These extensions are implemented only in the Cambria Math font (MS),
and now in Asana Math (FOSS).
AIUI, the MATH table in Cambria is developed specifically for Cambria
and will not be a 100% fit for other fonts; this is hy MS hasnt done
anything about documenting it properly.
Dave