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Rule learning approaches

  • Rule learning can be seen as a search problem in the latice of possible rules

  • Depending on the starting point and on the direction of search we can distinguished three classes of rule learning approaches:
  1. Specialization – the search procedure starts at the top of the lattice and searches towards the bottom of the latice, towards the concrete descriptions. Specialization is top-down .
  2. Generalization – the search procedure starts at the bottom of the lattice and advances up the lattice towards the t o p element. Generalization is bottom-up .
  3. Combining of specialization and generalization – the search procedure can start at any arbitrary point in the lattice and can move freely up or down as needed.

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