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阐明集值信息系统具有知识表达的实际意义;引入关于相容关系的最大相容分类方法对论域中的对象分类,以保证每个相容类中的对象具有共同的属性特征;讨论集值信息系统的属性约简问题,利用区分函数,给出核及约简的求法.
Clarify the practical significance of the set-valued information system with knowledge representation; introduce the maximum compatible classification method for the compatibility relationship to classify the objects in the universe of discourse so as to ensure that the objects in each compatible class have common attribute characteristics; Information system attribute reduction problem, the use of distinction function, given nuclear and reduction method.