Encyclopedia of Social Network Analysis and Mining

2014 Edition
| Editors: Reda Alhajj, Jon Rokne

Retrieval Models

  • Benno Stein
  • Tim Gollub
  • Maik Anderka
Reference work entry
DOI: https://doi.org/10.1007/978-1-4614-6170-8_117




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 text document


Specifically here, a small set of words that expresses a user’s information need


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


Retrieval models provide the formal means to address (information) retrieval taskswith the aid of a computer. A retrieval task is given if an information need is to be satisfied against an information source. More specifically, the information need...

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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • Benno Stein
    • 1
  • Tim Gollub
    • 1
  • Maik Anderka
    • 1
  1. 1.Bauhaus-Universität WeimarWeimarGermany