# OpenType Feature File specification, section 5.f.i, example 2
# "Specifying a Chain Sub rule and marking sub-runs"
# http://www.adobe.com/devnet/opentype/afdko/topic_feature_file_syntax.html

languagesystem latn dflt;

feature test {
    lookupflag 7;
    substitute [a e n] d' by d.alt;
} test;