Encyclopedia of Social Network Analysis and Mining

Living Edition
| Editors: Reda Alhajj, Jon Rokne

Retrieval Models

  • Benno Stein
  • Tim Gollub
  • Maik Anderka
Living reference work entry
DOI: https://doi.org/10.1007/978-1-4614-7163-9_117-1

Synonyms

Glossary

Feature

A characteristic property of a document. Usually, a document’s terms are used as features, but virtually every measurable document property can be chosen, such as word classes, average sentence lengths, principal components of term-document-occurrence matrices, or term synonyms.

Information need

Specifically here: A lack of information or knowledge that can be satisfied by a set of text documents.

Query

Specifically here: A small set of terms that expresses a user’s information need.

Relevance

The extent to which a document is capable to satisfy an information need. Within probabilistic retrieval models, relevance is modeled as a binary random variable.

Definition

A retrieval model provides a formal means to address (information) retrieval tasks with the aid of a computer.

Introduction

A retrieval task is given if an information need is to be satisfied by exploiting an information resource. More...

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References

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Copyright information

© Springer Science+Business Media LLC 2017

Authors and Affiliations

  1. 1.Bauhaus-Universität WeimarWeimarGermany
  2. 2.Bad ArolsenGermany

Section editors and affiliations

  • Thomas Gottron
    • 1
  • Stefan Schlobach
    • 2
  • Steffen Staab
    • 3
  1. 1.Institute for Web Science and TechnologiesUniversität Koblenz-LandauKoblenzGermany
  2. 2.YUAmsterdamThe Netherlands
  3. 3.Institute for Web Science and TechnologiesUniversität Koblenz-LandauKoblenzGermany