编写回调方法，从XML文档中提取信息。
Write callback methods to fetch the information from an XML document.
正则表达式通过捕获来提取信息。
提取信息的方法必须小心慎用。
Methods of drawing out information have to be carefully monitored.
提取信息。
并提出了一种简单提取信息的方法：三角形法。
At last a kind of simple way was formed. It is the way of triangle.
文本挖掘就是用于从文本中提取信息的数据挖掘技术。
Text mining is data mining applied to information extracted from text.
例如，产品描述页面可能会从电子商务目录数据库中提取信息。
For example, a product description page might draw information from your e-commerce catalog database.
例如，产品描述页面可能会从电子商务目录数据库中提取信息。
For example, a product description page might draw information from your e-commerce catalog database.
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