In base mode the specifies script and language and always uses the default. This is because in font-otb.lua the feature initializer is registered at position 1 while setscript et al. in font-oti.lua are not giving a position, as a result base mode feature initialisation is invoked before script/language are set.
Removing the position from features initializer registration fixes my immediate problem, but I'm not sure if it has any other complication. Regards, Khaled -- Khaled Hosny Egyptian Arab
\setupbodyfont[xits] \starttext \startformula A' A'' A''' A^\prime A_\prime A^{A^{A}} \stopformula \stoptext
___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________