Tuplets can be nested. Here there is a 5:2 tuplet inside a 3:2 tuple (all consisting of written eighth notes). MusicXML Part 30 0 major 2 4 G 2 B 4 10 1 eighth 3 2 quarter begin B 4 10 1 eighth 3 2 quarter end B 4 4 1 eighth 15 4 begin 5 eighth 2 eighth B 4 4 1 eighth 15 4 continue B 4 4 1 eighth 15 4 continue B 4 4 1 eighth 15 4 continue B 4 4 1 eighth 15 4 end B 4 10 1 eighth 3 2 quarter begin B 4 10 1 eighth 3 2 quarter end light-heavy