一种支持对象联系的有效方法

An Effective Method of Supporting Relationships Among Objects

本文提出了一种在面向对象模型中有效支持联系的实现方法一反向属性方法。与传统的面向对象模型相比，该方法能更方便地描述对象间的联系，显著改善联系操作的性能而保持复杂对象的ＤＡＧ结构不变。在支持特殊的联系方面，本文引入了一些成员对象的插入／删除限制，从而增强了模型的灵活性。将这些插入／删除限制和反向属性方法联合应用可简洁地描述引用完整性约束和分属联系。

This paper presents an approach, called inverse attribute method, to support the effective implementation of relationships of objects in object-oriented data model. As compared with the conventional model this method makes it more convenient to describe the relationships among objects and can improve the performance of operations significantly, while maintaining the DAG structure of complex objects intact. The paper also introduces some constraints for inserting/deleting component objects to enhance the flexibility of the model. The combineduse of the methods gives an explicit expression of integrity constraints and the IS--PART--OF relationship of object-oriented data model.