逻辑数据模型用来创建设计数据库所需的蓝图。
Logical data models are used for creating the blueprint needed to design your database.
RDA中的逻辑数据模型对于数据库的意义，就如同设计草图对于建造房屋的意义。
The logical data model in RDA is to databases as sketches are to designing a house.
Rational Rose XDE软件提供了用于创建并维护描述项目体系架构、过程流、逻辑组件关系和数据库设计的uml模型的工具。
Rational Rose XDE software provides tools for creating and maintaining UML models that depict project architecture, process flow, logical component relationships, and database design.
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