基于HyTime的超媒体文档系统的一种实现方法

AN IMPLEMENTATION METHOD OF HYPERMEDIA DOCUMENT SYSTEM BASED ON HYTIME

超媒体文档由一系列结构化的信息组成，这些信息包含不同类型的媒体，传统的文档系统描述这些信息比较困难．ＨｙＴｉｍ ｅ 标准作为ＳＧＭＬ的一个应用不仅能够描述超媒体文档的结构，而且能描述不同媒体之间的同步关系．ＨｙＴｉｍ ｅ的主要缺点是非常复杂，不容易用软件实现全部模块的功能．文中提出了一种采用３ 层模型来实现符合ＨｙＴｉｍ ｅ标准的超媒体文档系统的方法。

A Hypermedia document consists of a set of structural information that can be in different forms of media, and it's difficult for traditional document system to describe this information. As an implementation of SGML, HyTime standard can present not only the structure of Hypermedia document, but also the synchronization relationships between media objects. One of the HyTime's greatest drawbacks is its complexity, that is, it's very hard to implement the whole module function of HyTime. In this paper, a three layer system is developed and implemented, in which multimedia presentations can be retrieved.