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Front coding

  • Front-coding:

    • Sorted words commonly have long common prefix – store differences only

    • (for last k-1 in a block of k)

    • 8automata8automate9automatic10automation

                        → 8automat*a1♦e2ic3ion


               Encodes automat          Extra length beyond automat.

  • Begins to resemble general string compression.

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