as 0 or 1 for false and true respectively. If the \fIdata-type\fR is
\fBsubtree\fR the \fIdata\fR is a sub-list. In all other cases, the
\fIdata\fR is the empty string.
as 0 or 1 for false and true respectively. If the \fIdata-type\fR is
\fBsubtree\fR the \fIdata\fR is a sub-list. In all other cases, the
\fIdata\fR is the empty string.