Abstract: The structure of middle language is designed, the change from middle language to SQL sentence is researched, the algorithm is given and the test is done. The test shows that it can change a majority of Chinese query sentence of GIS to SQL sentence. With regard to some complex and the meaning that serious stray from the point of Chinese query sentence of GIS, it needs to find other way to solve.

Key words: Geographic information system, Chinese query, Middle language, Simple SQL, Nested SQL

摘要： 设计了中间语言的结构，研究了这种中间语言到SQL语句的转换，给出了相应的转换算法，并对算法进行了测试。测试结果表明此算法对大多数查询语句能转换为相应的SQL语句，但对于一些复杂、歧义性严重的查询语句还需用其它途径来解决。
关键词：

关键词: GIS, 中文查询, 中间语言, 简单SQL, 嵌套SQL

CLC Number: 

• TP311