Query and Document Models

• Vector Space Model (VSM)

  D = < w1, w2, ….., wm> m= total # of terms
  
  (or) wi = weight of term ti
  D = set of pairs < ti, wi > , wi > 0

• Queries represented similarly

• Similarity measure like dot product to match documents to queries

• Relevance Threshold to guarantee recall and precision

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