The function element represents classical functional harmony with an indication like I, II, III rather than C, D, E. It represents the Roman numeral part of a functional harmony rather than the complete function itself. It has been deprecated as of MusicXML 4.0 in favor of the numeral element.
The
<function>element.The function element represents classical functional harmony with an indication like I, II, III rather than C, D, E. It represents the Roman numeral part of a functional harmony rather than the complete function itself. It has been deprecated as of MusicXML 4.0 in favor of the numeral element.
See
https://www.w3.org/2021/06/musicxml40/musicxml-reference/elements/function/