摘要
本文首先介绍了现有的DDB模型,提出了一种扩充关系的DDB模型,并基于该模型设计并实现了一个演绎数据库系统DQL/DDBS,其中演绎查询语言DQL是一种数据结构独立,非过程化,交互式的自主型语言,并从功能上对DQL进行了分析设计.实验结果表明:这种语言是非常有效的,它为用户提供了一个较好的专家系统DDB开发工具.
In this paper, we first introduce current models for DDB and propose a new DDB model: Relation Eextended Deductive Model(REDM), On which a deductive database system DQL / DDBS has been built. The system query language DQL is a data-structure-in dependent, non-procedral, interactive, self-contained one. The experiment result has shown that DQL is of efficiency and provides users with a good developing tool for Expert System and DDB.
出处
《小型微型计算机系统》
CSCD
北大核心
1992年第3期17-22,52,共7页
Journal of Chinese Computer Systems
基金
航空科学基金
关键词
演绎数据库
查询语言
DQL语言
Deductive data base, query language, knowledge base, inference artificial intelligence, data base.
