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Table 2 Total and average values of each feature extraction approach selected for the ML-100k and HetRec2011-ML2k databases

From: Exploiting feature extraction techniques on users’ reviews for movies recommendation

  Total Average occurrence
ML-100k Heuristic terms 3085 223.32
  Classification terms 8433 401.07
  Heuristic aspects 78 22.59
  Hierarchy aspects 933 236.65
HetRec ML Heuristic terms 33,618 840.89
  Classification terms 17,864 1469.43
  Heuristic aspects 55 41.59
  Hierarchy aspects 5428 2097.93