Author image Marvin Humphrey
and 1 contributors


KinoSearch::Analysis::Stopalizer - Suppress a "stoplist" of common words.


    my $stopalizer = KinoSearch::Analysis::Stopalizer->new(
        language => 'fr',
    my $polyanalyzer = KinoSearch::Analysis::PolyAnalyzer->new(
        analyzers => [ $case_folder, $tokenizer, $stopalizer, $stemmer ],

This class uses Lingua::StopWords for its default stoplists, so it supports the same set of languages.


Suppress a "stoplist" of common words.

A "stoplist" is collection of "stopwords": words which are common enough to be of little value when determining search results. For example, so many documents in English contain "the", "if", and "maybe" that it may improve both performance and relevance to block them.

Before filtering stopwords:

    ( "i", "am", "the", "walrus" ) 

After filtering stopwords:

    ( "walrus" );

Stopalizer provides default stoplists for several languages, courtesy of the Snowball project (<>), or you may supply your own.


new( [labeled params] )

    my $stopalizer = KinoSearch::Analysis::Stopalizer->new(
        language => 'de',
    # or...
    my $stopalizer = KinoSearch::Analysis::Stopalizer->new(
        stoplist => \%stoplist,
  • stoplist - A hash with stopwords as the keys.

  • language - The ISO code for a supported language.


KinoSearch::Analysis::Stopalizer isa KinoSearch::Analysis::Analyzer isa KinoSearch::Obj.


Copyright 2005-2009 Marvin Humphrey

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