+=head1 CLASS METHODS
+
+=over 4
+
+=item default_tags
+
+Returns the tagnums of all tags that have 'by_default' enabled.
+
+=cut
+
+sub default_tags {
+ my $class = shift;
+ map { $_->tagnum } qsearch('part_tag', { disabled => '', by_default => 'Y' });
+}
+