预定义：Compass内置支持在文档之间创建预定义类型的关系。
Predefined: Compass has built-in support for creating relationships of predefined types between documents.
他们并不知道如何用上面这些预定义类型表示他们希望的数据类型。
They will not know how to define the notation of what they want based on the above pre-defined types.
为了使构建插件变得更方便，pde自带了多种模板，其中包括预定义类型的插件。
To make building plug-ins easier, the PDE comes with a variety of templates, including pre-defined types of plug-ins.
应用推荐