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Wrapper Induction

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Encyclopedia of Database Systems

Synonyms

Wrapper Generation; Information Extraction

Definition

Wrapper induction (or query induction) is a subfield of wrapper generation, which itself belongs to the broader field of information extraction (IE). In IE, wrappers transform unstructured input into structured output formats, and a wrapper generation systems describes the transformation rules involved in such transformations. Wrapper induction is a solution to wrapper generation where transformation rules are learned from examples and counterexamples (inductive learning). The induced wrapper subsequently is applied to unseen input documents to collect further label relations of interest. To ease annotation of examples by the user, the learning framework is often implemented within a visual annotation environment, where the user selects and deselects elements visually.

The term “wrapper induction” was first conceptualized by Nicholas Kushmerick in his influential PhD thesis in 1997 in the context of semi-structured Web...

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Author information

Authors and Affiliations

  1. Vienna University of Technology, Vienna, Austria

    Max Goebel

  2. Lixto Software GmbH, Vienna, Austria

    Michal Ceresna

Authors
  1. Max Goebel
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  2. Michal Ceresna
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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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Goebel, M., Ceresna, M. (2009). Wrapper Induction. In: LIU, L., ÖZSU, M.T. (eds) Encyclopedia of Database Systems. Springer, Boston, MA. https://doi.org/10.1007/978-0-387-39940-9_1160

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