Marvin Humphrey > KinoSearch-0.315 > KinoSearch::Analysis::Tokenizer

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NAME ^

KinoSearch::Analysis::Tokenizer - Split a string into tokens.

DEPRECATED ^

The KinoSearch code base has been assimilated by the Apache Lucy project. The "KinoSearch" namespace has been deprecated, but development continues under our new name at our new home: http://lucy.apache.org/

SYNOPSIS ^

    my $whitespace_tokenizer
        = KinoSearch::Analysis::Tokenizer->new( pattern => '\S+' );

    # or...
    my $word_char_tokenizer
        = KinoSearch::Analysis::Tokenizer->new( pattern => '\w+' );

    # or...
    my $apostrophising_tokenizer = KinoSearch::Analysis::Tokenizer->new;

    # Then... once you have a tokenizer, put it into a PolyAnalyzer:
    my $polyanalyzer = KinoSearch::Analysis::PolyAnalyzer->new(
        analyzers => [ $case_folder, $word_char_tokenizer, $stemmer ], );

DESCRIPTION ^

Generically, "tokenizing" is a process of breaking up a string into an array of "tokens". For instance, the string "three blind mice" might be tokenized into "three", "blind", "mice".

KinoSearch::Analysis::Tokenizer decides where it should break up the text based on a regular expression compiled from a supplied pattern matching one token. If our source string is...

    "Eats, Shoots and Leaves."

... then a "whitespace tokenizer" with a pattern of "\\S+" produces...

    Eats, 
    Shoots 
    and 
    Leaves.

... while a "word character tokenizer" with a pattern of "\\w+" produces...

    Eats 
    Shoots 
    and 
    Leaves

... the difference being that the word character tokenizer skips over punctuation as well as whitespace when determining token boundaries.

CONSTRUCTORS ^

new( [labeled params] )

    my $word_char_tokenizer = KinoSearch::Analysis::Tokenizer->new(
        pattern => '\w+',    # required
    );

INHERITANCE ^

KinoSearch::Analysis::Tokenizer isa KinoSearch::Analysis::Analyzer isa KinoSearch::Object::Obj.

COPYRIGHT AND LICENSE ^

Copyright 2005-2011 Marvin Humphrey

This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

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