I know nomenclature can be somewhat arbitrary, but I’ve heard Kaval, Ney, and the California Native American flutes called “rim blown flutes” and the Quena and Shakuhachi called “notch flutes”.
The Xiao is cool because it has a round blow-hole and stopped end like a transverse flute, but with the blow-hole moved to the top corner. It seems to me to be sort of halfway b...