这是一个定义每一种UML建模概念特性和这些特性与其他相关概念直接的关系的模型。
This is a model that defines the characteristics of each UML modeling concept, and its relationships to other modeling concepts.
用户、目标、处理过程、用户接口面板等概念都被放到一起，它们之间的关系通过一个模型来确定和描述。
Concepts like Users, goals, processes, User interface panels, and so on are put all together, and their relationships are identified and described using a model.
概念数据模型是在初始阶段创建的，通常只包括实体和它们最重要的关系。
The conceptual data model is created during the initial phases and typically includes only entities and their most important relationships.
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