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Zbl 1118.68669
Zhang, Wenxiu; Qiu, Guofang; Wu, Weizhi
A general approach to attribute reduction in rough set theory. (English)
[J] Sci. China, Ser. F. 50, No. 2, 188-197 (2007). ISSN 1009-2757

Summary: The concept of a consistent approximation representation space is introduced. Many types of information systems can be treated and unified as consistent approximation representation spaces. At the same time, under the framework of this space, the judgment theorem for determining consistent attribute set is established, from which we can obtain the approach to attribute reductions in information systems. Also, the characterizations of three important types of attribute sets (the core attribute set, the relative necessary attribute set and the unnecessary attribute set) are examined.

MSC 2000:: *68T30 Knowledge representation

Keywords: rough sets; attribute reduction; information systems; approximation representation spaces

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