First, AOG and its shortcomings are discussed from the view of data reduction: the single attribute threshold control of AOG is boolean control, so when there are exceptions, it can cause data over reduction and lose the meanings of data reduction.

• 首先从数据简化的角度分析讨论了 AOG及其不足 :AOG的单一属性阈值控制是布尔型控制 ；在有例外存在的情况下 ；可能造成数据过度简化 ；失去数据简化的意义 .