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Permuterm index

  • For term hello, index under:

    • hello$, ello$h, llo$he, lo$hel, o$hell

    • where $ is a special symbol.

  • Queries:

    • X lookup on X$                    X* lookup on $X*

    • *X lookup on X$*              *X* lookup on X*

    • X*Y lookup on Y$X*           X*Y*Z ??? Exercise!


                                         Query = hel*o

                                             X=hel, Y=o

                                         Lookup o$hel*

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