1# OpenType Feature File specification, section 5.f.ii, example 2
2# "Specifying exceptions to the Chain Sub rule"
3# http://www.adobe.com/devnet/opentype/afdko/topic_feature_file_syntax.html
4
5feature test {
6    @LETTER = [a-z];
7    ignore sub @LETTER f' i';
8    sub f' i' by f_i.begin;
9} test;
10