它还包含一些不用于结构上的项目管理信息，比如版本号、名称、ID和源储存库的位置。
It also contains nonstructural project management information, such as version number, name, ID, and source repository location.
它提供了一整套正规的格式用于描述对象的结构，而不管语言上如何执行及这些数据的具体指代，也不用去管到底是什么样的应用程序。- A SN。
It provides a set of formal format for describing the structure of the object, regardless of language and how to refer to these specific data, do not take up tube in the end what kind of applications.
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