Science in China Series F: Information Sciences

, Volume 50, Issue 2, pp 188–197

A general approach to attribute reduction in rough set theory


DOI: 10.1007/s11432-007-0017-6

Cite this article as:
Zhang, W., Qiu, G. & Wu, W. SCI CHINA SER F (2007) 50: 188. doi:10.1007/s11432-007-0017-6


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.


rough setsattribute reductioninformation systemsapproximation representation spaces

Copyright information

© Science in China Press 2007

Authors and Affiliations

  1. 1.Institute for Information and System Sciences, Faculty of ScienceXi’an Jiaotong UniversityXi’anChina
  2. 2.School of ManagementXi’an University of Architecture and TechnologyXi’anChina
  3. 3.Information CollegeZhejiang Ocean UniversityZhoushanChina