(subclass PetPolicy Policy) | Hotel.kif 2507-2507 | PetPolicy 是 Policy 的 subclass |
(subclass PetsAllowedPolicy PetPolicy) | Hotel.kif 2556-2556 | PetsAllowedPolicy 是 PetPolicy 的 subclass |
(subclass NoPetsPolicy PetPolicy) | Hotel.kif 2572-2572 | NoPetsPolicy 是 PetPolicy 的 subclass |