【摘要】 文章就面向对象建模提出对象之间的存在依赖关系,研究存在依赖关系在面向对象建模中的使用方法和表示方法。首先从对象生存周期的角度提出存在依赖的概念、定义和它的特点,然后指出存在依赖关系在静态模型和动态模型中的约束关系,以及基于存在依赖关系的静态模型向关系型数据库的映射。更多还原

【Abstract】 Existence Dependency Relationship is advanced for object-oriented modeling in this paper.Its use method and express method in object-oriented modeling is studied.According to object life cycle,the concept ,definition and specialty of existence dependency relationship are advanced.Then constrain relationship of existence dependency relation-ship in static and dynamic models is indicated.It is introduced how to apply it in to RDB and proposes a kind of ob-ject operating model based on existence dependency relationship.更多还原