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ICIRA '09 Proceedings of the 2nd International Conference on Intelligent Robotics and Applications
Tag tree template for Web information and schema extraction
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Bricolage: example-based retargeting for web design
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Intelligent self-repairable web wrappers
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RTED: a robust algorithm for the tree edit distance
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The main issue for effective Web information extraction is how to recognize similar patterns in a Web page. Tra- ditionally, it has been shown that pattern matching by us- ing the HTML DOM tree is more efficient than the sim- ple string matching approach. Nonetheless, previous tree- based pattern matching methods have problems by assum- ing that all HTML tags have the same values, assigning the same weight to each node in HTML trees. This paper proposes an enhanced tree matching algo- rithm that improves the tree edit distance method by con- sidering the characteristics of HTML features. We assign different values to different HTML tree nodes according to their weights for displaying the corresponding data objects in the browser. Pattern matching of HTML patterns is done by obtaining the maximum mapping values of two HTML trees that are constructed with weighted node values from HTML data objects. Experiments are done over several Web commerce sites to evaluate the effectiveness of the proposed HTML tree matching algorithm.