NAME

Lingua::Stem::Ru - Porter's stemming algorithm for Russian (KOI8-R only)

SYNOPSIS

    use Lingua::Stem::Ru;
    my $stems = Lingua::Stem::Ru::stem({ -words => $word_list_reference,
                                         -locale => 'ru',
                                         -exceptions => $exceptions_hash,
                                      });

    my $stem = Lingua::Stem::Ru::stem_word( $word );

DESCRIPTION

This module applies the Porter Stemming Algorithm to its parameters, returning the stemmed words.

The algorithm is implemented exactly as described in:

    http://snowball.tartarus.org/russian/stemmer.html

The code is carefully crafted to work in conjunction with the the Lingua::Stem manpage module by Benjamin Franz. This stemmer is also based on the work of Aldo Capini, see the Lingua::Stem::It manpage.

METHODS

stem({ -words => \@words, -locale => 'ru', -exceptions => \%exceptions });

Stems a list of passed words. Returns an anonymous list reference to the stemmed words.

Example:

  my $stemmed_words = Lingua::Stem::Ru::stem({ -words => \@words,
                                              -locale => 'ru',
                                          -exceptions => \%exceptions,
                          });

stem_word( $word );

Stems a single word and returns the stem directly.

Example:

  my $stem = Lingua::Stem::Ru::stem_word( $word );

stem_caching({ -level => 0|1|2 });

Sets the level of stem caching.

'0' means 'no caching'. This is the default level.

'1' means 'cache per run'. This caches stemming results during a single call to 'stem'.

'2' means 'cache indefinitely'. This caches stemming results until either the process exits or the 'clear_stem_cache' method is called.

clear_stem_cache;

Clears the cache of stemmed words

EXPORT

None by default.

HISTORY

0.01 (2004-05-21)

AUTHOR

Aleksandr Guidrevitch <pillgrim@mail.ru>

COPYRIGHT

This software may be freely copied and distributed under the same terms and conditions as Perl itself, either Perl version 5.8.3 or, at your option, any later version of Perl 5 you may have available..

Lingua::Stem::Ru - Porter's stemming algorithm for Russian