According to one embodiment, the Web pages that match a user's designated collection condition are collected from a plurality of Web sites. The collected Web pages are divided into a plurality of clusters, based on URL information of the Web pages. A date expression is extracted from Web pages included...http://www.google.fr/patents/US7526462?utm_source=gb-gplus-shareBrevet US7526462 - Method and apparatus for generating time-series data from web pages
Method and apparatus for generating time-series data from web pages