}
+=item h_date ACTION
+
+Given an ACTION, either "insert", or "delete", returns the timestamp of the
+appropriate history record corresponding to this record, if any.
+
+=cut
+
+sub h_date {
+ my($self, $action) = @_;
+ my $h = $self->h_search($action);
+ $h ? $h->history_date : '';
+}
+
=back
=head1 SUBROUTINES