=item revision - revision name/number, subordinate to model
+=item title - external ID
+
=back
=head1 METHODS
|| $self->ut_foreign_key('classnum', 'hardware_class', 'classnum')
|| $self->ut_text('model')
|| $self->ut_textn('revision')
+ || $self->ut_textn('title')
;
return $error if $error;