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Example for index construction

  • Map:

  • d1 : C came, C c’ed.

  • d2 : C died. →

  • (C,d1>, <came,d1>, <C,d1>, <c'ed, d1>, >C, d2>, <died, d2>

  • Reduce:

  • (<C,(d1,d2,d1)>, <died,(d2)>, <came, (d1)>, <c'ed,(d1)>) 

    → <C,(d1:2,d2:1)>, <died,(d2:1)>,  <came, (d1:1)>, <c'ed,(d1:1)>) 

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