超媒体系统模型NEXTER

The Hypermedia System Model NEXTER

介绍一种新型的基于客户／服务器的超媒体模型─—ＮＥＸＴＥＲ的总体结构及其实现方法．该模型的主要优点是方便在网络上实现分布式的超媒体系统，以及简化在已有的超媒体系统中增加新媒体类型的手续．基于ＮＥＸＴＥＲ模型的超媒体系统工作在一个数据库系统之上，由４类服务器组成，其中，会话服务器管理对超媒体的游览，媒体服务器处理对各种媒体形式的内部数据，环境服务器向用户提供了界面，而超媒体数据库管理系统管理超媒体数据库．

This paper introduces the architecture and implementation tips of a new client/ server based hypermedia system model NEXTER. The main advantage of the new model is that it supports the implementation of distributed hypermedia systems, and provides an easier way to add new media types to existed hypermedia systems. A NEXTER-based hypermedia system, made up of four kinds of servers, must work in a database enviroment. Session server allows user to browse the hyperbase. Media server is responsible for the processing of the kernel data of various media types. Enviroment server supports the interface between system and users. Hyperbase Management System manages the data in hyperbase.