基于演绎面向对象数据库的查询语言

The inquiry language based on deduction which objects-oriented database

演绎数据库(DDB)和面向对象数据库(OODB)已分别沿着不同道路独立地发展,并取得了许多成果。DDB研究和OODB研究具有很大的互补性,要将两者结合起来。演绎数据库和面向对象数据库是传统数据库技术的重要扩展,通过用固定逻辑基础的递归和声明查询,演绎数据库扩展了传统数据库的表达能力。但演绎数据库缺乏强大的数据建模能力,而面向对象数据库缺乏逻辑语义和声明查询语言。在下一代信息系统中组合面向数据(结构化)、行为和演绎是必要的,但用户查询语言应含有高级面向对象和演绎原语的集合。

Deduction database （DDB） and the object-oriented database （OODB） have already developed along their own path independently, and also reached many great results. Both the DDB research and the OODB research have the big supplementary, so we must combine the two things. DDB and OODB are the important expansion of the traditional database technology. Using through the fixed logical reeursion and the statement inquiry, DDB expands the expression ability compared with traditional database. But this kind database lacks the formidable ability of data mold eonstnlction and the OODB lacks the logical semantics and the ability of statement inquiry language. So in next generation, it is necessary to combine information system and make it face to data, the behavior and the deduction. But the user inquires the language should include high-level object-oriented and the deductive primitive set.