Defining the Dynamicity and Diversity of Text Collections

  • Ilya Markov
  • Fabio Crestani
Part of the Lecture Notes in Computer Science book series (LNCS, volume 6273)


In Information Retrieval collections are often considered to be relatively dynamic or diverse, but no general definition has been given for these notions and no actual measure has been proposed to quantify them. We give intuitive definitions of the dynamicity and diversity properties of text collections and present measures for calculating them based on the notion of novelty. Experimental results show that the proposed measures are consistent with the definitions and can distinguish collections effectively according to their dynamicity and diversity properties.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • Ilya Markov
    • 1
  • Fabio Crestani
    • 1
  1. 1.Faculty of InformaticsUniversity of LuganoLuganoSwitzerland

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