摘要
演绎对象数据库是对象数据模型和演绎数据库集合的产物．它集成演绎数据库的查询能力和对象数据库的强大建模能力．ＤＯＬ（ｄｅｄｕｃｔｉｖｅｏｂｊｅｃｔｂａｓｅｌａｎｇｕａｇｅ）是作者设计的一种演绎对象库语言，它支持类、类层次、继承、集合、部分集、方法及重载和否定．文章着重研究继承、重载和复杂结构化值的交互关系．定义了压缩操作子和重载操作子．基于这两个操作子，定义了与经典逻辑程序类似的直接后承操作子，并研究其不定点性质．
The integration of deductive database and object database results in deductive object database which has capacities of deductive query of deductive database and strong modeling of object database. DOL (deductive object base language) is designed as a deductive object base language. It supports class, object identifier, complex object, partial set, inheritance and overriding. A immediate consequent operator, similar to tradition's, is defined based on two operators: compact operator and overriding operator in this paper. In addition, a fixed point semantics is analyzed.
出处
《软件学报》
EI
CSCD
北大核心
1998年第10期771-776,共6页
Journal of Software
关键词
演绎对象库语言
DOL
描述型语义
演绎数据库
Deductive object database, partial set, compact operator, overriding operator, declarative semantics.
