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Bayes Nets in IR

  • Flexible ways of combining term weights, which can generalize previous approaches

    • Boolean model

    • Binary independence model

    • Probabilistic models with weaker assumptions

  • Efficient large-scale implementation

    • InQuery text retrieval system from U Mass

      • Turtle and Croft (1990) [Commercial version defunct?]

  • Need approximations to avoid intractable inference

  • Need to estimate all the probabilities by some means (whether more or less ad hoc)

  • Much new Bayes net technology yet to be applied?

Speaker notes:

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