In this paper, we give a temporal er - method - based data model, that is the temporal Entity Relationship model (TER).
本文给出了一个基于E- R方法的时态数据模型，即时态实体-关系(TER)模型。
In this paper, we analyze the shortcomings of hierarchical structure, and build product model with extended entity relationship (EER) approach. A product model of fuel pump is shown as an example.
该文分析了递阶结构表达方式的不足，利用扩展的实体关联(eer)表达方式建立了产品的数据模型，并以油泵产品为例建立了产品数据模型的展开结构。
In this paper, we analyze the shortcomings of hierarchical structure, and build product model with extended entity relationship (EER) approach. A product model of fuel pump is shown as an example.
该文分析了递阶结构表达方式的不足，利用扩展的实体关联(eer)表达方式建立了产品的数据模型，并以油泵产品为例建立了产品数据模型的展开结构。
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