Lingua::Stem::EnBroken - Porter's stemming algorithm for 'generic' English

         Jim Richardson, University of Sydney
         jimr@maths.usyd.edu.au or http://www.maths.usyd.edu.au:8000/jimr.html

         Integration in Lingua::Stem by
         Jerilyn Franz, FreeRun Technologies,
         <cpan@jerilyn.info>

        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.

       Jim Richardson, University of Sydney Jerilyn Franz, FreeRun Technologies

       This code is freely available under the same terms as Perl.

       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.

       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

       Lingua::Stem::EnBroken - Porter's stemming algorithm for 'generic' English

       This code is almost entirely derived from the Porter 2.1 module written by Jim Richardson.

        Lingua::Stem

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

perl v5.38.2                                       2024-05-16                        Lingua::Stem::EnBroken(3pm)