When you expand the XForms (input) section, you see that the ref USES an XPath expression to point to the id element in the data instance (see figure 8).

当展开XForms(输入)部分时，将看到ref使用XPath表达式指向数据实例中的id元素(参见图8)。

youdao

The homepage ref attribute is specifically used to point to a Web URL so that a user may go to a Web page that provides more information about the application.

homepage ref属性是专门用于指向Web URL从而用户可以去提供了关于应用程序的更多的信息的web页面。

youdao

For example, an external ejb reference (an ejb-ref in the deployment descriptor) in a Web application is tied to an actual deployed ejb component at this point — and no sooner.

例如，Web应用程序中的外部ejb引用(部署描述符中的ejb - ref)就是在此时被绑定到实际部署的ejb组件——而且是立即绑定。

youdao