这些元素可以让聚合feed的消费者能轻易通过程序判定一个聚合的每个组件的特征。

These elements allow consumers of Aggregate feeds an easy way to programmatically determine the characteristics of each component of an aggregate.

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Web 浏览器和其他客户机使用这些元数据决定如何处理该文件，比如判定本身能否显示它还是要传递给帮助器程序。

Web browsers and other clients use this metadata to decide how to process the file -- for example, to determine whether they can display it natively or have to pass it to a helper application.

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应用程序服务器作出基本内容判定，并且在不等待客户机请求的情况下将数据推到手持设备。

The application server makes basic content decisions and pushes data to the handheld device without waiting for the client s request.

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