Encyclopedia of Database Systems

2018 Edition
| Editors: Ling Liu, M. Tamer Özsu

Wrapper Induction

  • Max GoebelEmail author
  • Michal Ceresna
Reference work entry
DOI: https://doi.org/10.1007/978-1-4614-8265-9_1160


Information extraction; Wrapper generation


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 system 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 Ph.D thesis in 1997 in the context of semi-structured Web...

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Vienna University of TechnologyViennaAustria
  2. 2.Lixto Software GmbHViennaAustria

Section editors and affiliations

  • Georg Gottlob
    • 1
  1. 1.Computing Lab.Oxford Univ.OxfordUK