UML is a universal language, so although it supports many modeling concepts it lacks some concepts that are specific to XML.

UML是一种通用语言，因此虽然支持很多建模概念，但是缺乏针对XML的一些概念。

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Classes are often represented in diagrams using the Universal Modeling Language (UML).

类通常使用通用建模语言(Universal Modeling Language, UML)表示在图表中。

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UML is an universal visual modeling language. It is used to describe software, visual process, construct and build software document.

UML是一种通用的可视化建模语言，用于对软件进行描述、可视化处理、构造和建立软件系统的文档。

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