These tools are classified into three categories - informationretrieval tool for logined name and address, indexed informationretrieval tool and interactiveinformationretrieval tool.
这些工具分成三类——登录姓名和地址的信息检索工具，索引信息检索工具和互动信息检索工具。
2
It provides an interactive interface according to domain ontology, user can use it to learn and build his her personal information need, so to implement personal retrieval service.