Hi,
I was wondering if there is anyway to turn on auto-justification for nastaliq kashida ligatures in Indesign CS5? I already have added lots of kashida ligatures, and now I am trying to make them "appear" automatically when space adjusted. So I read through opentype tags, and found table which does the job. Unfortunately, it is limited to only init, medi and fina forms... :(
"The jalt table maps the initial, medial, final or isolated forms to their corresponding alternate forms"
http://www.microsoft.com/typography/otspec/features_fj.htm

Also I have seen another rare feature called "Stretched Alternate". But I am not sure what tag it uses in opentype. Any suggetions? :)