[NTG-context] One very silly question

Hi, I read the manual, and it said: rm, ss,tt,hw,cg are styles, bf,it,bi,sl,bs, sc, os, tf are alternatives. one can use one alternative in one style like \rm\bf. However, I think we should add more alternatives like boldsmallcaps or bold old style number? in opentype, smcp, onum are just features, and every alternatives (like bold, bold italic) have them. btw, I think there should be a (fontconfig like) mechanism for setting up opentype fonts easier? Yue Wang