layer(optional)Identifies the layer to which a feature applies.
One or more values of datatype positiveInteger, separated by spaces.
part(optional)Indicates the part in which the current feature should appear. Use '%all' when the
feature should occur in every part.
One or more values of datatype
a string matching the following regular expression: "(%all|#[\i][\c]+)"
, separated by spaces.
partstaff(optional)Signifies the part staff on which a notated feature occurs. Use '%all' when the
feature should occur on every staff.
One or more values of datatype
a string matching the following regular expression: "(%all|\d+(-\d+)?)"
, separated by spaces.