摘要： 本文介绍了演绎数据库系统EMTL的功能以及用它设计的两个应用实例,分析了EMTL语言作为DDBS语言的能力,并就用EMTL开发应用系统中的一些问题作了简单的讨论,给出了我们的看法。

Abstract: The functions of EMTL, a deductive database system (DDES) and two applications implemented in EMTL are given. EMTL is analysed in its ability to act as a DDES language. Problems of developing application system in EMTL are discussed.