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 Lingua::Stem module by Benjamin Franz. This stemmer is also based on the work of Aldo Capini, see Lingua::Stem::It.

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>

SEE ALSO

Lingua::Stem

COPYRIGHT

Copyright (C) 2003 by Aldo Calpini <dada@perl.it>

Copyright (C) 2004 by Aleksandr Guidrevitch <pillgrim@mail.ru>

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..