Fomus

obj-id: this slot isn't used by fomus.
event-partid: this slot is equivalent to the slot in the note class.
event-voice: this slot is analogous to but different than the slot in the note class. the difference is that when set to a list of voices, the rest object is distributed to all the specified voices instead of one that is chosen by fomus.
event-off: this slot is equivalent to the slot in the note class.
event-dur: this slot is equivalent to the slot in the note class with the exception that rests cannot be grace notes.
event-marks: this slot is equivalent to the slot in the note class. however, the number of marks that can be used in the rest class is limited. see the mark class for more information and Marks for a more detailed explanation of marks and their usage.