+
+ # Is the pagespec limited to terms that will continue
+ # to match pages as long as those pages exist?
+ my $limited=1;
+ while ($limited && $pagespec=~m/(\w+)\([^\)]*\)/g) {
+ $limited = $1 =~ /^(glob|internal|creation_month|creation_day|creation_year|created_before|created_after)$/;