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1.支持SGML/XML的搜索引擎:数字图书馆用户服务系统的资源表述将以SGML/XML为主,因此需要一个支持SGML/XML的搜索系统,该搜索系统应既可以支持集中的元数据资源,也可以支持分布的数字资源库;同时亦具有其他常用的检索功能,并且应该满足对海量数据(3亿以上条目)的快速查询。 2.音频、视频网络流式控制、传输、播放软件及其实用生产加工系统。可在因特网上高质量、低码流的播放MPEG-1,MPEG-2,MP3及WAVE等文件,提供用户使用。
1. SGML / XML-enabled search engine: The resource representation of the digital library user service system will be based on SGML / XML and therefore requires a search system that supports SGML / XML, which should support both centralized metadata resources , It also supports distributed digital repositories; it also has other commonly used search functions and should be able to satisfy fast queries on huge amounts of data (more than 300 million entries). 2. Audio, video network streaming control, transmission, playback software and its practical production and processing system. Can be used on the Internet to play MPEG-1, MPEG-2, MP3 and WAVE files of high quality and low bit stream.