Lectures on information retrieval

Authors:
Maristella Agosti;Fabio Crestani;Gabriella Pasi
Affiliations:
Univ. di Padova, Padova, Italy;Univ. of Strathclyde, Glasgow, Scotland;ITIM, Milan, Italy
Venue:
Lectures on information retrieval
Year:
2001

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Abstract

Information Retrieval (IR) is concerned with the effective and efficient retrieval of information based on its semantic content. The central problem in IR is the quest to find the set of relevant documents, among a large collection containing the information sought, satisfying a user's information need usually expressed in a natural language query. Documents may be objects or items in any medium: text, image, audio, or indeed a mixture of all three.