These techniques are designed for situations where the structure or content of a Web page is highly predictable and unlikely to change.
这些技术是专门为网页的结构或内容具有高度可预测性、不太可能出现变化的情况而设计的。
These techniques begin with an HTML Web page and derive semantics from the content of that page.
这些技术从一个 HTML 网页开始，从页面的内容导出语义。
With these two techniques, content consumers can choose among a variety of different formats of the data on a Web page.
通过这两种技术，内容消费者可以在网页上各种不同的数据格式之间作出选择。
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