| 摘要: |
| 在当今计算机技术发展的主流中，中间件技术是客户／服务器结构的关键技术.在对数据库专用中间件──RDA技术的深入研究后，针对它灵活性低、可扩充性差的特点，本文提出了适于构造基于通用型中间件的分布式环境的新技术──多级文法.实践证明将多级文法的技术引入中间件的构造大大提高了中间件的灵活性，增强了它的可扩充性，并使中间件本身具有了一些新的特点.目前，一个基于该多级文法的通用型中间件的原型系统已可在UNIX平台运行. |
| 关键词: 多级文法 三维文法表 非确定性匹配 外部文法的控制机制 |
| DOI： |
| 分类号: |
| 基金项目:本文研究得到国家“八五”攻关项目基金资助. |
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| THE CONSTRUCTION AND IMPLEMENTATION OF MULTI-LEVEL GRAMMAR |
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CHENG Ling,BAO Zhendong,HUANG Shangteng
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| Abstract: |
| In this paper, a kind of multi-lever grammar is introduced. It is the theoretical basis of plugable middleware based on distributed environment. Beginning with the distributed environment based on the client/server architecture, the authors propose the multi-level grammar based on 3-D syntax analysis table, and then expound its supporting mechanism thoroughly, so as to implement the plug and play protocol automation automatically. |
| Key words: Multi-level grammar 3-D syntax table unknown matching external grammar controlling mechanism |
