reference in attribute value的意思|示意

In addition, since the Tiles framework is only providing the value of the SRC attribute for the frame, you could also use a frameset layout to reference other Web applications within a tile.

此外，由于Tiles框架只提供了框架的src属性的值，还可以使用框架集布局在tile中引用其他Web应用程序。

Without a value for the context attribute, such an absolute URL is assumed to reference a resource in the current servlet context.

如果没有为contex t属性指定值，那么就认为这样的绝对URL引用当前servlet上下文内的资源。