Each subject is given a number according to a standard method of classfication. 每一个主题被赋予一个号码根据分类标准来排列。
Unlike most of the existing CBR system, this approach makes use of neural networks to realize the dynamic classfication to index the case. 与现存大多数实例推理系统不同，该方法用神经网络实现实例的动态分类和索引。
