它们由逻辑数据模型转换而来，其中实体和关系转换为表、列、主键、外键以及约束。
They are transformations of logical data model where the entities and relationships are transformed into tables, columns, primary keys, foreign keys, and constraints.
那么，让我们为每个实体Bean来定义约束吧。
So, let's define the constraints for each of our entity beans.
对于每个实体Bean，我们仅需增加一个Groovy脚本来定义合适的约束。
For each of our entity beans, we simply need to add a Groovy script to define the appropriate constraints.
我们在Speaker实体中加入一个约束，年龄应在25到60之间，但测试套件对此约束不予考虑。
We added a constraint in our Speaker entity that age should be between 25 and 60, but the test suite does not take that constraint into consideration.
实体表示实际的对象，它具有约束条件并且关联到另一个实体，如图4所示。
Entities are representation of real world objects which can have constraints and relationship with another entity, as shown in Figure 4.
还有两项工作：在实体间建立他们之间的关系和检查实体的每一个属性和属性的约束。
Two tasks remain: establishing the relationships between these entities, and reviewing each entity's attributes and constraints.
关系型数据库的逻辑模型进一步规范化这些实体和关系，并形成带有主外键约束的表。
The logical model for a relational database normalizes the entities and relationships into tables with foreign key constraints.
第二步，模拟实验条件，对模型施加边界约束，把实体模型转换为有限元的数学模型，并利用屈曲分析，对瓦楞纸板竖向边压的临界载荷进行计算。
Second, Simulating experiment condition, putting constraint on boundary of model, changing entity model to finite element model and using buckled analysis to calculate the CD critical load.
信任协商利用信任策略对信任实体本地资源进行约束，既可以用于建立信任也可以用于获取服务。
Trust negotiation USES trust policy to restrict accessing local resources, and trust negotiation could be used in either trust establishment or accessing service.
高校后勤经济实体稳健经营的意义深远，但要实现其稳定、健康、持续经营还存在许多约束因素。
The steady operation of the rear service economic entities in universities and colleges is of profound significance.
第(2)款范围之外的实体应自其交存批准书或加入书之日起三个月之后受本条约约束。
Any entity not covered by paragraph (2) shall become bound by this Treaty three months after the date on which it has deposited its instrument of ratification or accession.
提出了以实体模型、测量要素、定形尺寸、定位尺寸、行为约束为构造成份的特征模型；
The feature model presented here is consisted ot five components: solid model, measure elements, size dimensions, and location dimensions as well as constrains behaviour.
您可以建置您的实体和它们的属性、定义关联性和其条件约束，并在设计工具建立继承阶层架构权限。
You can build your entities and their properties, define relationships and their constraints, and create inheritance hierarchies right in the designer.
本文提出了包含组织纵向和横向结构的组织元模型，并采用UML对象约束语言(ocl)描述了元模型中实体与实体之间的联系和约束关系。
In this paper, an organization meta-model including both hierarchy and teamwork structure is presented and then UML object constraint language (OCL) is adopted to formalize the meta-model.
本文提出了包含组织纵向和横向结构的组织元模型，并采用UML对象约束语言(ocl)描述了元模型中实体与实体之间的联系和约束关系。
In this paper, an organization meta-model including both hierarchy and teamwork structure is presented and then UML object constraint language (OCL) is adopted to formalize the meta-model.
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