$self->ut_numbern('devicepart')
|| $self->ut_text('devicename')
|| $self->ut_foreign_keyn('inventory_classnum', 'inventory_class', 'classnum')
$self->ut_numbern('devicepart')
|| $self->ut_text('devicename')
|| $self->ut_foreign_keyn('inventory_classnum', 'inventory_class', 'classnum')