it looks like you&#x27;d add dashes for the tails, just like you would for a semiquaver on paper.  
one of the great things about this is that there&#x27;s zero &#x27;design&#x27; to sheet music, its essentially a spec.  
There&#x27;s a lot of implied information that can be fed into the handwriting recognition, and it looks like it doesn&#x27;t try to parse until you&#x27;ve moved onto the next bar, so can analyze the block against a very well defined domain.  
Vertical lines all represent a note (besides small ticks for sharps maybe), and the time signature narrows this down to only so many possible permutations of possibilities.