@dis(optional)Records the amount of octave displacement.
@dis.place(optional)Records the direction of octave displacement.
@dur(optional)When a duration cannot be represented as a single power-of-two value, multiple
space-separated values that add up to the total duration may be used.
@endid(optional)Indicates the final element in a sequence of events to which the feature
applies.
@evaluate(optional)Specifies the intended meaning when a participant in a relationship is itself a
pointer. Allowed values are: "all" (If an element pointed to is itself a pointer, then the target of that pointer will
be taken, and so on, until an element is found which is not a pointer.), "one" (If an element pointed to is itself a pointer, then its target (whether a pointer
or not) is taken as the target of this pointer.), "none" (No further evaluation of targets is carried out beyond that needed to find the
element(s) specified in plist or target attribute.)
@layer(optional)Identifies the layer to which a feature applies.
@part(optional)Indicates the part in which the current feature should appear. Use 'all' when the
feature
should occur in every part or 'none' when the feature should not appear in any part.
@partstaff(optional)Signifies the part staff on which a notated feature occurs. Use 'all' when the
feature should occur on every staff.
@plist(optional)When the target attribute is present, plist identifies the active participants; that
is, those entities pointed "from", in a relationship with the specified target(s).
When
the target attribute is not present, it identifies participants in a mutual
relationship.
@staff(optional)Signifies the staff on which a notated event occurs or to which a control event
applies. Mandatory when applicable.
@startid(optional)Holds a reference to the first element in a sequence of events to which the feature
applies.
@tstamp(optional)Encodes the onset time in terms of musical time, i.e., beats[.fractional beat part],
as expressed in the written time signature.
@tstamp2(optional)Encodes the ending point of an event, i.e., a count of measures plus a beat location
in the ending measure.