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GUIs for Web Data Extraction

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Encyclopedia of Database Systems

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Synonyms

Visual web data extraction; Wrapper generator GUIs; Visual web information extraction

Definition

While content management systems (CMS) are geared towards adding presentational information to relational and structured data from database systems, thus dynamically generating HTML documents, the goal of GUIs for Web data extraction is diametrically opposed: The commonly semi-automatic Web data extraction tools intend to removeall presentational information from Web pages, so that only pure structured content remains. The extraction process itself does not address single documents, but template types, such as the product page of an online retailer or the news page template of an online journal. That is, for each template type, one set of extraction rules is generated. These extraction rules are defined in a graphical manner, by selecting the pieces of information that are relevant and by assigning labels to them. To this end, GUIs are used that largely resemble Web browsers,...

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Recommended Reading

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Author information

Authors and Affiliations

  1. Siemens AG, Munich, Germany

    Cai-Nicolas Ziegler

Authors
  1. Cai-Nicolas Ziegler
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Editor information

Editors and Affiliations

  1. College of Computing, Georgia Institute of Technology, 266 Ferst Drive, 30332-0765, Atlanta, GA, USA

    LING LIU (Professor) (Professor)

  2. Database Research Group David R. Cheriton School of Computer Science, University of Waterloo, 200 University Avenue West, N2L 3G1, Waterloo, ON, Canada

    M. TAMER ÖZSU (Professor and Director, University Research Chair) (Professor and Director, University Research Chair)

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© 2009 Springer Science+Business Media, LLC

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Ziegler, CN. (2009). GUIs for Web Data Extraction. In: LIU, L., ÖZSU, M.T. (eds) Encyclopedia of Database Systems. Springer, Boston, MA. https://doi.org/10.1007/978-0-387-39940-9_1163

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