1languagesystem DFLT dflt; 2 3feature test { 4 rsub [a A] [b B] [c C] q' [d D] [e E] [f F] by Q; 5 rsub [a A] [b B] [c C] [s - z]' [d D] [e E] [f F] by [S - Z]; 6 7 # Having no context for a reverse chaining substitution rule 8 # is a little degenerate (we define a chain without linking it 9 # to anything else), but makeotf accepts this. 10 rsub p by P; 11} test; 12