摘要： Napster 和Gnutella 各有其优点和不足，为了克服它们的不足之处，该文提出了基于Agent 的Super-Peers 网络结构。网络中的信息剧增，为了克服传统的关键字查找方法的不精确性， Agent 采用元数据进行精确查找。每个节点的Agent 提供主动服务和智能搜索功能。在P2P 搜索过程中，提出了一种解决双方都不在线情况下的基于元数据的查找及下载所需信息的方法。

关键词: P2P 技术；信息共享；智能Agent；元数据检索

Abstract: Napster and Gnutella systems possess their advantages as well as their disadvantages. Super-Peers networking overcome their disadvantages. This paper proposes metadata search to replace conventional keywords based search. The agent on each peer can serve on its own initiative and search intelligently. During the process of P2P searching, it proposes a method to search and download required information based on metadata, in case of each side is offline.

Key words: P2P; Information sharing; Intelligent agent; Metadata search