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