Searching for web information more efficiently using presentational layout analysis Online publication date: Wed, 23-Jul-2003
by Milos Kovacevic, Michelangelo Diligenti, Marco Gori, Veljko Milutinovic
International Journal of Electronic Business (IJEB), Vol. 1, No. 3, 2003
Abstract: Extracting and processing information from web pages is an important task in many areas such as constructing search engines, information retrieval, and data mining from the web. A common approach in the extraction process is to represent a page as a bag of words and then to perform additional processing on such a flat representation. In this paper, we propose a new, hierarchical representation that includes browser screen coordinates for every HTML object on a page. Using visual information one is able to define heuristics for recognition of common page areas such as a header, left and right menu, footer and the centre of a page. Initial experiments have shown that, using our heuristics, defined areas are recognised properly in 73% of cases. Finally, we introduce a classification system which, taking into account the proposed document layout analysis clearly outperforms standard systems by 10% or more.
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