使用该快捷方式，您能够以更加简洁的方法创建清单5中的元素。
Armed with this shortcut, you can create the in Listing 5 in a much more compact way.
“添加文件”命令添加现有的快捷方式时，将会添加该快捷方式所指向的文件，而不是添加快捷方式本身。
Add Files command will add the file that the shortcut points to rather than the shortcut itself.
这些声明的作用在于将名称空间前缀与作为快捷方式的特定uri相关联，以后您就可以在XML消息中重用该快捷方式。
The purpose of these declarations is to associate a namespace prefix with a particular URI as a shortcut, which you can then reuse later in the XML message.
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