Partial Word

A partial word is a string that may contain a number of "do not know" or "do not care" symbols i.e. placeholders in the string where the symbol value is not known or not specified. More formally, a partial word is a partial function where is some finite alphabet. If u(k) is not defined for some then the unknown element at place k in the string is called a "hole". In regular expressions (following the POSIX standard) a hole is represented by the metacharacter ".". For example, aab.ab.b is a partial word of length 8 over the alphabet A ={a,b} in which the fourth and seventh characters are holes.

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Famous quotes containing the words word and/or partial:

    Every word is a prejudice.
    Friedrich Nietzsche (1844–1900)

    And meanwhile we have gone on living,
    Living and partly living,
    Picking together the pieces,
    Gathering faggots at nightfall,
    Building a partial shelter,
    For sleeping and eating and drinking and laughter.
    —T.S. (Thomas Stearns)