Also, look at the use of the UI: define tag in two places.

看一下ui： define标记在两个地方的用法。

youdao

In a moment, you'll see an example of a page that USES the define tag to clarify how this works.

一会儿，您将看到一个使用define标记的页面示例，用来说明其工作方式。

youdao

For example, a page that wants to use this template file needs to use the define tag, specifying for its name attribute the same name value referenced in the insert tag.

例如，一个准备使用该模板的页面需要使用define标记，将其name属性指定为insert标记中所引用的同一name值。

youdao

The tag names, and what they mean, are left for the author to define depending on the subject matter.

ECONOMIST: The Internet