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Handling Multiple Constraints

  • Different constraints may require different or even conflicting item-ordering
  • If there exists an order R s.t. both C1 and C2 are convertible w.r.t. R, then there is no conflict between the two convertible constraints
  • If there exists conflict on order of items
    • Try to satisfy one constraint first
    • Then using the order for the other constraint to mine frequent itemsets in the corresponding projected database

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