| (subclass TextDocument Document) | Media.kif 930-930 | TextDocument 是 Document 的 subclass |
| (subclass Letter TextDocument) | Media.kif 954-954 | 信件 是 TextDocument 的 subclass |
| (subclass ContractDocument TextDocument) | Media.kif 975-975 | ContractDocument 是 TextDocument 的 subclass |
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