We will define hierarchical-based web pages and how we can perform data extraction using the minimal code of the Struts 2 OGNL framework.

我们将定义一些基于层级的 web 页面，并展示如何使用最少的 Struts 2 OGNL 框架代码执行数据提取。

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Therefore, you can facilitate extraction of data from the web using a query language for XML such as XQuery.

因此，您可以使用针对XML的查询语言(比如XQuery)，促进从web抽取数据。

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Forum structured data extraction is the meta-data extraction from web forums such as post title, post author, post time and post content. It is the foundation of processing forum data.

论坛的结构化数据抽取是对论坛中帖子的标题、作者、发表时间和内容文本块等论坛元数据的抽取，它是处理论坛数据的基础。

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Mr. Singhal said Google and the Metaweb team, which then numbered around 50 software engineers, have since expanded the size of the index to more than 200 million entities, partly by developing "extraction algorithms, " or mathematical formulas that can organize data scattered across the Web.

WSJ: Google Gives Search a Refresh