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In discourse-based grammatical theory, information flow is any tracking of referential information by speakers. Information may be ''new,'' just introduced into the conversation; ''given,'' already active in the speakers' consciousness; or ''old,'' no longer active. The various types of activation, and how these are defined, are model-dependent. Information flow affects grammatical structures such as *word order (topic, focus, and afterthought constructions). *active, passive, or middle voice. *choice of deixis, such as articles; "medial" deictics such as Spanish ''ese'' and Japanese ''sore'' are generally determined by the familiarity of a referent rather than by physical distance. *overtness of information, such as whether an argument of a verb is indicated by a lexical noun phrase, a pronoun, or not mentioned at all. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Information flow」の詳細全文を読む スポンサード リンク
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