Several different ways to express music using abc can lead to the same music.
For instance, the two following tunes :
X:1
T:dots example
L:1/8
K:D
d3d
X:2
T:dots example
L:1/4
K:D
d>d
describe the same melody : a dotted quarter note followed by eighth note. The consequence of this is that their
representation in Note objects will be the same : the first note is a Note instance
whose strict duration is Note.QUARTER and its countDots() will return 1.
The second note is a Note.EIGHTH without any dot.