摘要
提出了语义查询树的中间语言结构,设计了查询语句向语义查询树的转换算法。为了解决嵌套结构转换的难点,引进了查询块的概念,实现了查询块向SQL语句转换的算法,并将此转换方法与以前的方法进行了比较。实验表明,本文方法是一种比较理想的中文查询语句的理解方法。
The idea that use the structure of semantic meaning query tree as middle language is put forward. The algorithm of translation Chinese query sentence of GIS into semantic meaning query tree is designed. In order to solve the difficulty of nested structure of SQI.,the idea of query block is introduced and the algorithm of changing query block to SQL is realized, The compare of this way with old ones has been done. The experiment shows that the validity has been enhanced. So it is a better way to understand Chinese query sentence.
出处
《武汉大学学报（信息科学版）》
EI
CSCD
北大核心
2006年第10期924-927,共4页
Geomatics and Information Science of Wuhan University
基金
武汉市青年科技晨光计划资助项目(2004500607-16)
关键词
中文查询语句
中间语言
查询块
语义查询树
SQL语句
Chinese query sentence
middle language
query block
semantic meaning query tree
structured query language
