实体联系模型 meaning in English
e/r model
entity relatio hip model
entity relationship model
entity-relationship model
Examples
- The entity related data model to implement the pdm is introduced . the development method of evolving and increasing pdm database , developing procedure and its design are put forward . in the third chapter , the evolving and increasing of the pdm system is analyzed from view of the user and designer
第二章，阐述了pdm数据库的递增进化过程，递增进化的pdm系统数据模型，对数据对象实体联系模型进行了分类，介绍了pdm系统实现的数据对象实体联系模型，提出了pdm数据库递增进化开发方法、步骤和设计过程。