复合对象选择条件中的量词约束及谓词演算

Quantity Limitation and Predicate Calculus in Selection Condition of Composite Objects

为表征对象间复杂的关系,克服传统的关系模型所带来的限制,OODB数据库技术得以迅速发展。

This paper gives the quantity-limiting relationships of complex objects lying in different nesting lays and their expression methods,which can be translated into object predicate calculus by means of our methods. The expression methods can express a kind of complex selection queries.