|| $self->ut_alphan('serialnum')
|| $self->ut_foreign_key('alarmsystemnum', 'alarm_system', 'systemnum')
|| $self->ut_foreign_key('alarmtypenum', 'alarm_type', 'typenum')
|| $self->ut_alphan('serialnum')
|| $self->ut_foreign_key('alarmsystemnum', 'alarm_system', 'systemnum')
|| $self->ut_foreign_key('alarmtypenum', 'alarm_type', 'typenum')