清单3：单元类型定义代码片段。

Listing 3: Unit type definition snippet.

youdao

这种类型定义引用了数据库域之中的单元，所以您必须为数据库域，从代码清单4向xsd添加名字域声明以及导入声明。

This type definition refers to a unit in the database domain, so you must add the namespace declaration and the import declaration for the database domain from Listing 4 to your XSD.

youdao

在定义自己的拓扑元素，集成uml模型，部署单元类型支持，以及使用拓扑来指导自动化方面也有较大的改进。

There have also been significant improvements for defining your own topology elements, integration with UML models, support for deployment unit types, and using the topology to guide automation.

youdao