1以产生式推理模式为基础，实现小型动物分类系统，推理方法可以采用正向推理或反向推理；

　　2 要求表示规则的语言必须能体现出规则前提和结论的对应关系，必须能体现出前提和结论中的逻辑关系；

　　3 要求能对规则库进行动态地增加、删除和修改操作；

　　4 要求用界面显示要查询的初始事实、推理方法、推理中用到的规则和结论。-Production mode of reasoning as the basis of small animal classification system, reasoning method can be used forward reasoning or backward reasoning　2 requires that the rules of the language must be able to reflect the corresponding relations of the rule premise and conclusion, must be able to reflect the premise and the conclusions logical relationship　3 requirements of the rule base dynamically increase, delete, and modify operations　4 requires rules interface used to query the initial facts, reasoning methods, reasoning and conclusions.