Reconfigurable Web Wrapper Agents

Authors:
Chia-Hui Chang;Harianto Siek;Jiann-Jyh Lu;Chun-Nan Hsu;Jen-Jie Chiou
Affiliations:
National Central University, Taiwan;Institute of Information Science, Taiwan;Institute of Information Science, Taiwan;Institute of Information Science, Taiwan;Deepspot Intelligent Systems, Taiwan
Venue:
IEEE Intelligent Systems
Year:
2003

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Abstract

The DeepSpot Agent Toolbox exploits online Web data sources using reconfigurable Web wrapper agents. These agents are rapidly generated and executed on the basis of the XML-based Web Navigation Description Language and extraction rule generator IEPAD (information extraction based on pattern discovery). A WNDL script describes how to locate, extract, and combine data. By executing different WNDL scripts, users can automate all types of Web browsing sessions. They also describe IEPAD, a data extractor based on pattern discovery techniques. IEPAD lets software agents automatically discover the extraction rules to extract the contents of a structurally formatted Web page without the need to label a Web page to train a wrapper. With this programming-by-example authoring tool, users can generate a complete Web wrapper agent by browsing the target Web sites. Various applications demonstrate this approach's feasibility.