lingua::stopwords(3pm) [debian man page]

Lingua::StopWords(3pm)					User Contributed Perl Documentation				    Lingua::StopWords(3pm)

NAME

       Lingua::StopWords - Stop words for several languages.

SYNOPSIS

	   use Lingua::StopWords qw( getStopWords );
	   my $stopwords = getStopWords('en');

	   my @words = qw( i am the walrus goo goo g'joob );

	   # prints "walrus goo goo g'joob"
	   print join ' ', grep { !$stopwords->{$_} } @words;

DESCRIPTION

       In keyword search, it is common practice to suppress a collection of "stopwords": words such as "the", "and", "maybe", etc. which exist in
       in a large number of documents and do not tell you anything important about any document which contains them.  This module provides such
       "stoplists" in several languages.

   Supported Languages
	   |-----------------------------------------------------------|
	   | Language	| ISO code | default encoding | also available |
	   |-----------------------------------------------------------|
	   | Danish	| da	   | ISO-8859-1       | UTF-8	       |
	   | Dutch	| nl	   | ISO-8859-1       | UTF-8	       |
	   | English	| en	   | ISO-8859-1       | UTF-8	       |
	   | Finnish	| fi	   | ISO-8859-1       | UTF-8	       |
	   | French	| fr	   | ISO-8859-1       | UTF-8	       |
	   | German	| de	   | ISO-8859-1       | UTF-8	       |
	   | Hungarian	| hu	   | ISO-8859-1       | UTF-8	       |
	   | Italian	| it	   | ISO-8859-1       | UTF-8	       |
	   | Norwegian	| no	   | ISO-8859-1       | UTF-8	       |
	   | Portuguese | pt	   | ISO-8859-1       | UTF-8	       |
	   | Spanish	| es	   | ISO-8859-1       | UTF-8	       |
	   | Swedish	| sv	   | ISO-8859-1       | UTF-8	       |
	   | Russian	| ru	   | KOI8-R	      | UTF-8	       |
	   |-----------------------------------------------------------|

FUNCTIONS

   getStopWords
	   my $stoplist      = getStopWords('en');
	   my $utf8_stoplist = getStopWords('en', 'UTF-8');

       Retrieve a stoplist in the form of a hashref where the keys are all stopwords and the values are all 1.

	   $stoplist = {
	       and => 1,
	       if  => 1,
	       # ...
	   };

       getStopWords() expects 1-2 arguments.  The first, which is required, is an ISO code representing a supported language.  If the ISO code
       cannot be found, getStopWords returns undef.

       The second argument should be 'UTF-8' if you want the stopwords encoded in UTF-8.  The UTF-8 flag will be turned on, so make sure you
       understand all the implications of that.

SEE ALSO

       The stoplists supplied by this module were created as part of the Snowball project (see <http://snowball.tartarus.org>,
       Lingua::Stem::Snowball).

       Lingua::EN::StopWords provides a different stoplist for English.

AUTHOR

       Maintained by Marvin Humphrey <marvin at rectangular dot com>.  Original author Fabien Potencier, <fabpot at cpan dot org>.

COPYRIGHT AND LICENSE

       Copyright 2004-2008 Fabien Potencier, Marvin Humphrey

       This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.8.3 or,
       at your option, any later version of Perl 5 you may have available.

perl v5.10.0							    2009-02-23						    Lingua::StopWords(3pm)

Check Out this Related Man Page

KinoSearch1::Analysis::Stopalizer(3pm)			User Contributed Perl Documentation		    KinoSearch1::Analysis::Stopalizer(3pm)

NAME

       KinoSearch1::Analysis::Stopalizer - suppress a "stoplist" of common words

SYNOPSIS

	   my $stopalizer = KinoSearch1::Analysis::Stopalizer->new(
	       language => 'fr',
	   );
	   my $polyanalyzer = KinoSearch1::Analysis::PolyAnalyzer->new(
	       analyzers => [ $lc_normalizer, $tokenizer, $stopalizer, $stemmer ],
	   );

DESCRIPTION

       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
	   @token_texts = ('i', 'am', 'the', 'walrus');

	   # after
	   @token_texts = ('',	'',   '',    'walrus');

CONSTRUCTOR

   new
	   my $stopalizer = KinoSearch1::Analysis::Stopalizer->new(
	       language => 'de',
	   );

	   # or...
	   my $stopalizer = KinoSearch1::Analysis::Stopalizer->new(
	       stoplist => \%stoplist,
	   );

       new() takes two possible parameters, "language" and "stoplist".	If "stoplist" is supplied, it will be used, overriding the behavior
       indicated by the value of "language".

       o   stoplist - must be a hashref, with stopwords as the keys of the hash and values set to 1.

       o   language - must be the ISO code for a language.  Loads a default stoplist supplied by Lingua::StopWords.

SEE ALSO

       Lingua::StopWords

COPYRIGHT

       Copyright 2005-2010 Marvin Humphrey

LICENSE, DISCLAIMER, BUGS, etc.
       See KinoSearch1 version 1.00.

perl v5.14.2							    2011-11-15				    KinoSearch1::Analysis::Stopalizer(3pm)

Linux and UNIX Man Pages

lingua::stopwords(3pm) [debian man page]

Check Out this Related Man Page