file f = baz/ptooie
dir f  = baz/ptooie/
combine = /foo/bar/baz/ptooie
combine = baz/ptooie/baz/ptooie
    build = /foo/bar/baz/ptooie.test
 filename = ptooie.test
extension = test
 basename = ptooie.test
basename1 = ptooie
listing example_data:
    Makefile
    alice
    ch_track.htk
    ch_wave.wav
    channel_names.map
    colours.map
    colours_translation.map
    eg.dtd
    eg.xml
    kdt_001.il
    kdt_001.pm
    kdt_001.tilt
    kdt_001.wav
    ked_wr1_012.utt
    key.lab
    options.file
    vit.B.ngram
    vit.observes
    vit.vocab
    wagon.data
    wagon.desc
    wagon.tree
done.