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Numbers

  • 3/12/91                Mar. 12, 1991                     12/3/91

  • 55 B.C.

  • B-52

  • My PGP key is 324a3df234cb23e

  • (800) 234-2333

    • Often have embedded spaces

    • Older IR systems may not index numbers

      • But often very useful: think about things like looking up error codes/stacktraces on the web

      • (One answer is using n-grams: Lecture 3)

    • Will often index “meta-data” separately

      • Creation date, format, etc.


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