相關性(Relevance)又叫關聯,是指一個主題與另一個主題存在某種形式的聯繫,這使得人們在考慮第一個主題時會同時考慮到第二個相關的主題。相關性的概念在許多不同的領域都有研究,例如認識論、邏輯學以及圖書館信息學[1]

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