Metamodels are relatively easy to understand; they are similar to an entity-relationship model.
元模型相对容易理解；它们与实体关系模型非常相似。
The entity-relationship model has gained acceptance in database design and is widely used in practice.
实质- 联系的模型已经得到数据库的接收设计并且广泛地被用于练习。
For each CompositeData, an entity model element is also created in order to capture conceptual entity-relationship models.
为了捕获概念性的实体-关系模型，为每一个复合数据建立一个关系模型元素。
The object-oriented model includes many of the concepts of the entity-relationship model, but represents executable code as well as data.
物件定向的模型含实质- 联系的模型许多观念，但是表现可运行的码和数据。
If, however, the majority of your data fits better in a highly structured entity-relationship model and is less document-like and more intertwined, then choosing an NXD might not help your situation.
但是，如果大多数数据更适合采用高度结构化的实体-关系模型，数据不太像文档并且关系更复杂，那么选择NXD可能并不合适。
Each class in the relationship model can be mapped to an entity EJB component.
关系模型中的每个类均可以映射一个实体e JB组件。
In addition, like CWM, ODM provides an entity relationship that could be used to model business functions decomposition, business information needs, and organization, decomposition.
另外，类似于CWM,ODM提供了可以在业务功能模型分解，业务信息需求以及组织分解中使用的实体关系。
Certain forms of rules are implicit in the definition of the business types in the model, and manifest in UML and entity relationship (er) models of the business types of the modeled domain.
有些形式的规则在模型中的业务类型定义中是隐式的，它们出现在被建模领域的业务类型的UML和实体关系(ER)模型中。
Figure 6: Reverse engineered meta-model for entity relationship models.
图6：实体关系模型的反向工程元模型。
In this model, we use an entity bean named PBUser which represents a user in the Personal Budget database. PBUser has one-to-one relationship reference with the following entity beans.
在此模型中，我们使用一个名为pbuser的实体Bean来代表PersonalBudget数据库中的一个用户。
Database model: Includes an entity relationship diagram for the databases the SOA USES.
数据库模型：包括SOA使用的数据库的实体关系图。
The OrderItems table is a link table in a many-to-many relationship between Orders and Products. As such, it does not represent an entity from the business model.
OrderItems表是多对多关系中Orders和Products的连接表，这样也不能代表对象模型中的一个实体。
Familiarity with a variety of model forms, such as entity-relationship diagrams (ERDs), UML, and other system-oriented modeling approaches, will provide you with a wide range of modeling options.
熟悉各种模型形式，如实体关系图(Entity - Relationship Diagram,ERD)、UML和其他面向系统的建模方法，将提供广泛的建模选项。
The conceptual model of the discipline architecture is represented through an extended entity-relationship approach.
用扩展的实体—联系方法描述学科体系结构的概念模型。
The final ERD (entity relationship model diagram) and system datum dictionary are given through data sheets normalization during logic design and physical design.
在逻辑设计与物理设计过程中通过数据规范化后得出最终的ER模型图并给出系统数据字典。
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 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。
The entity-relationship(E-R) data model is based on a perception of a real world that consists of a collection of basic objects, called entities, and of relationships among these objects.
实质-联系 （电子半径）数据模型以有一个基本物件的集合物件，叫做了实质的真正世界的一个知觉为基础，和在这些物件之中的联系。
Database design: an OLTP system usually adopts an entity-relationship (ER) data model and an application -oriented database design.
数据库设计：通常，OLTP系统采用实体-联系(ER)模型和面向应用的数据库设计。
Every aggregation type corresponds to a data structure diagram and an entity relationship model.
每种聚合类型对应一种数据结构图和ER模型。
Every aggregation type corresponds to a data structure diagram and an entity relationship model.
每种聚合类型对应一种数据结构图和ER模型。
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