Save the three entity sets (xhtml-lat1.ent, xhtml-special.ent, and xhtml-symbol.ent)
将这三个实体集（xhtml-lat1.ent、xhtml-special.ent和 xhtml-symbol.ent）保存到与 DTD 相同的子目录中。
Association sets (and entity sets) are logically grouped in an entity container.
关联集(和实体集)均在逻辑上群组于实体容器中。
The topic describes how to create a conceptual model with multiple entity sets per type (MEST).
本主题描述如何创建每种类型多个实体集(MEST)的概念模型。
An entity set is defined within an entity container, which is a logical grouping of entity sets and association sets.
实体集在实体容器中定义，后者是实体集和关联集的逻辑分组。
An association set is defined within an entity container, which is a logical grouping of entity sets and association sets.
关联集在实体容器中定义，后者是实体集和关联集的逻辑分组。
Entity sets (and association sets) are logically grouped in an entity container.
实体集(和关联集)均在逻辑上群组于实体容器中。
Entity sets (and association sets) are logically grouped in an entity container.
实体集(和关联集)均在逻辑上群组于实体容器中。
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