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Information retrieval on the Web

  • Modern information retrieval applies the same principles
    • In information retrieval, the notion of completeness (recall) becomes more and more meaningless in the context of Web scale information infrastructures.
    • It is very unlikely that a user requests all the information relevant to a certain topic that exists on a worldwide scale, since this could easily go far beyond the amount of information processing he or she is investing in achieving a certain goal. 
    • Therefore, instead of investigating the full space of precision and recall, information retrieval is starting to focus more around improving precision and proper ranking of results.

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