一种XML概念模型-XUML

由于XML已成为Web上表示结构化和半结构化数据的标准。设计XML模式的方法变得更加重要。为了设计或集成XML模式，常常需要基于合适的概念模型。本文分析了对XML概念模型的需求；提出了一种新的XML概念模型：XUML，并说明了XUML的主要特征和优点：能更明确地表示“包含”语义，支持“业务组件”概念，能在多级上下文中说明数据依赖，基于UML2标准；最后结合实例介绍了一种实现XUML的方法。

An XML Conceptual Model: XUML

As XML has become the standard for representing structured and semi-structured data on the Web, the methods for designing XML schemas is becoming more and more important. In order to design or integrate XML schemas, it is necessary to first design the conceptual structures with a proper conceptual model. The requirement to XML conceptual model is analyzed. Then a new XML conceptual model, XUML, has been introduced, which has following characteristics and advantages: expressing the containment semantics more explicitly, supporting the concept of Business Components, specifying the data dependencies in multiple contexts, and based on the UML2 standard. Lastly an approach to the implementation of XUML is explained by using an example.