@bracket.place(optional)Used to state where a tuplet bracket will be placed in relation to the note
heads.
Value conforms to data.STAFFREL.basic.
@bracket.slope(optional)Records the slope of a bracket; e.g., in terms of MEI virtual units. Positive
values indicate upward slope, negative values indicate slope downward, and a zero
value indicates
the bracket is horizontal.
Value conforms to data.MEASUREMENTSIGNED.
@bracket.visible(optional)States whether a bracket should be rendered with a tuplet.
Value conforms to data.BOOLEAN.
@num.format(optional)Controls how the num:numbase ratio is to be displayed. Allowed values are: "count" (Only the num attribute is displayed, , '7'.), "ratio" (Both the num and numbase attributes are displayed, , '7:4'.)