最有意思的是，XHTML规范指出，用户代理“应该”以某种方式支持这种链接。
The interesting part is that the XHTML specification says that user agents "should" make this link available somehow.
该链接提供一个针对各种服务的最新资源代理列表。
The link provides a list of the current resource agents for a wide variety of services.
这些可能需要在未来才能实现，虽然需要数年的努力，通过大量的链接，执法和智能代理数据库则不需要。
There’s much further to go. Despite years of effort, law-enforcement and intelligence agencies’ databases are not, by and large, linked.
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