@control(optional)Indicates whether or not a bar line is "controlling"; that is, if it indicates a point
of alignment across all the parts. Bar lines within a score are usually controlling;
that
is, they "line up". Bar lines within parts may or may not be controlling. When applied
to
<measure>, this attribute indicates the nature of the right bar line
but not the left.
Value conforms to data.BOOLEAN.
@form(optional)Records the appearance and usually the function of the bar line.
Value conforms to data.BARRENDITION.
<att.barLine.log>direct children@form
@metcon(optional)Indicates the relationship between the content of a measure and the prevailing
meter.
Value conforms to data.BOOLEAN.