Because HTTP is a stateless protocol, there is no inherent information about the page a user looked at previously before he or she looks at another one.

由于HTTP是无状态的协议，不存在有关用户在查看另一个页面之前所查看的页面的固有信息。

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And by adding a simple metadata feature, we see how easy it can be to give the user direct access to information on the server, without worrying about protocol.

通过添加简单的元数据，我们看到让用户直接访问服务器上的信息是多么简单，无需担心协议的问题。

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This information is for statistical purposes, for tracing protocol violations, and for automated user agent recognition so you can tailor responses to avoid particular user agent limitations.

此信息用于统计目的，用来跟踪协议违规和自动执行的用户代理识别，因此，您可以自定义响应以避免特定的用户代理限制。

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