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对现有超媒体系统中常用的几种导游机制进行了介绍和分析.借鉴PFNET(PATHFINDER网)这种网状模型,根据超媒体系统中的节点、链和用户使用习惯,提出了两类导游图,以期对用户浏览信息起到真正的导游作用,解决超媒体系统中的迷路问题.“,”Some navigation mechanism are introduced and analyzed. Based on PFNET(pathfinder net) which is a network model, according to nodes and links and users custom, two types of navigation graph are presented to help the users browse information and solve the lost problem in hypermedia systems.