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Field-Based Information Retrieval Models

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Encyclopedia of Database Systems

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Definition

A document D consists of a set of n document fields, and it is represented by a set of n vectors, where each vector corresponds to a document field. A field-based Information Retrieval (IR) model assigns a score or Retrieval Status Value (RSV) to a document D and a query Q by distinguishing the occurrences of query terms in the different field vectors, and by weighting the contribution of each field appropriately.

Historical Background

Textual documents, whether they are news wire items, scientific publications, or Web pages, are rich in structure. For example, depending on its length, a text can be organized in chapters, sections, paragraphs, and each of those can have a concise description in the form of a title. Shorter texts, such as emails, also consist of free text and formatted text. In information retrieval (IR), however, documents are usually represented as a single vector, the dimensions of which correspond to terms occurring in the document. Such a representation...

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Author information

Authors and Affiliations

  1. Yahoo Reasearch Barcelona, Barcelona, Spain

    Vassilis Plachouras

Authors
  1. Vassilis Plachouras
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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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Plachouras, V. (2009). Field-Based Information Retrieval Models. In: LIU, L., ÖZSU, M.T. (eds) Encyclopedia of Database Systems. Springer, Boston, MA. https://doi.org/10.1007/978-0-387-39940-9_927

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