In this paper,based on the indiscernibility discipline in Rough Set theory,two new measurement definitions are defined:attribute Maximum Discernibility Value(MDV) and Attribute Redundancy Rate(ARR).

• 基于Rough Set理论中的不可分辨性原理,给出两个新的定义属性的最大区分值(Maximum Dis-cernibility Value,MDV)和属性冗余度(Attribute Redundancy Rate,ARR)。