信息抽取。本文中所涉及的程序有两个，一个是在基于规则学习的信息抽取过程中对转换规则的处理，其核心算法就是加载规则文档中的信息进入内存并形成语义集合和规则集合两个链表。-Information extraction. Involved in this process there are two, one is rule-based learning in the process of information extraction processing of the conversion rules