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information retrieval

Information retrieval, according to  [IR], deals with the representation, storage, organisation of, and access to information items.

To see what is involved, imagine that we have a (user) query like:

find me the pages containg information on ...

information retrieval models

• boolean or set-theoretic models
• vector or algebraic models
• probabilistic models

vector models

• attribute term weighting scheme improves performance
• partial matching strategy allows retrieval of approximate material
• metric distance allows for sorting according to degree of similarity