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Relation: subclass

Document20Instances of Document are ContentBearingObjects that are intended to convey propositional conte...^
    TextDocument2Instances of TextDocument are Documents that have at least one part that is an instance of ...^
        Letter.A brief message which is intended to be mailed to a person or Organization.^
        ContractDocument.Instances of ContractDocument are TextDocuments that describe the terms of a contract.^

Relation: Term:

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