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Lingua::Stem::EnBroken(3pm) User Contributed Perl Documentation Lingua::Stem::EnBroken(3pm)
NAME
Lingua::Stem::EnBroken - Porter's stemming algorithm for 'generic' English
SYNOPSIS
use Lingua::Stem::EnBroken;
my $stems = Lingua::Stem::EnBroken::stem({ -words => $word_list_reference,
-locale => 'en',
-exceptions => $exceptions_hash,
});
DESCRIPTION
This routine MIS-applies the Porter Stemming Algorithm to its parameters, returning the
stemmed words. It is an intentionally broken version of Lingua::Stem::En for people
needing backwards compatibility with Lingua::Stem 0.30 and Lingua::Stem 0.40. Do not use
it if you aren't one of those people.
It is derived from the C program "stemmer.c" as found in freewais and elsewhere, which
contains these notes:
Purpose: Implementation of the Porter stemming algorithm documented
in: Porter, M.F., "An Algorithm For Suffix Stripping,"
Program 14 (3), July 1980, pp. 130-137.
Provenance: Written by B. Frakes and C. Cox, 1986.
I have re-interpreted areas that use Frakes and Cox's "WordSize" function. My version may
misbehave on short words starting with "y", but I can't think of any examples.
The step numbers correspond to Frakes and Cox, and are probably in Porter's article (which
I've not seen). Porter's algorithm still has rough spots (e.g current/currency, -ings
words), which I've not attempted to cure, although I have added support for the British
-ise suffix.
CHANGES
2003.09.28 - Documentation fix
2000.09.14 - Forked from the Lingua::Stem::En.pm module to provide
a backward compatibly broken version for people needing
consistent behavior with 0.30 and 0.40 more than accurate
stemming.
METHODS
stem({ -words => \@words, -locale => 'en', -exceptions => \%exceptions });
Stems a list of passed words using the rules of US English. Returns an anonymous array
reference to the stemmed words.
Example:
my $stemmed_words = Lingua::Stem::EnBroken::stem({ -words => \@words,
-locale => 'en',
-exceptions => \%exceptions,
});
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
NOTES
This code is almost entirely derived from the Porter 2.1 module written by Jim Richardson.
SEE ALSO
Lingua::Stem
AUTHOR
Jim Richardson, University of Sydney
jimr AT maths.au or http://www.maths.usyd.edu.au:8000/jimr.html
Integration in Lingua::Stem by
Jerilyn Franz, FreeRun Technologies,
<cpan AT jerilyn.info>
COPYRIGHT
Jim Richardson, University of Sydney Jerilyn Franz, FreeRun Technologies
This code is freely available under the same terms as Perl.
BUGS
TODO
perl v5.30.3 2020-08-23 Lingua::Stem::EnBroken(3pm)
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Under GNU General Public License
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