摘要
本文主要讨论了开放对象的代数操作及其性质，这些操作提供了开放对象理解消息和构造消息的基本手段。同时还定义了偏序关系ｂ，并在其上讨论了这些操作的单调性，特别是递归查询。
This paper mainly deals with algebra operation of open object and their properties, where these operattors provide basic means for open object understanding and constructing messages. It also defines partial order b,and on the basis of it the monotonicity of these operators,especially recursive query is discussed.
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
1995年第7期108-116,共9页
Journal of South China University of Technology(Natural Science Edition)
关键词
数据库
操作
单调算子
开放对象
递归查询
s:database
operation,monotone operators/open object
recursive query
