KBMDS：基于知识的地图数据库系统

KBMDS: knowledge-based maps database system

ＫＢＭＤＳ是在ＭＤＳ地图数据库的基础上，结合ＡＩ技术，面向地图的基于知识的地图数据库系统．它具有四种功能：编辑功能、查询功能、学习功能和人机交互功能．系统采用了框架语义网络的知识表达方法及其推理机制实现对图象物体的描述和检索．基于查询实例的学习功能提高了系统的查询效率；基于规则的图象物体描述提供了自动知识获取的途径．ＫＢＭＤＳ提供了两种查询语言，一种是具有二维文法的ＱＰＥ；一种是具有线性文法的ＬＩＰＬ语言．

KBMDS is a knowledge-based pictorial database system for the military maps,utilizing Al technology on the basis of MDS (Map Database System). It has four kinds of functions: editing function, retrieval function, learning function and interactive function. It uses knowledge representation schema of framework and its reasoning mechanism to realize the representation and retrieval of pictorial object. Learning function based on the retrieval instance can raise system retrieval efficiency. Pictorial object representation based on rule provides the way of automatic knowledge acquisition. KBMDS provides two kinds of query language: one is QPE query language with two-dimension grammar, the other is LIPL query language with linear grammar.