NAME

Lingua::NegEx - Perl extension for finding negated phrases in text.

SYNOPSIS

 use Lingua::NegEx;

 my $scope = negation_scope( 'There is no pulmonary embolism.' );
 print $scope; # prints '3 - 4'

DESCRIPTION

This is a perl implementation of Wendy Chapman's NegEx algorithm which uses a list of phrases to determine whether clinical conditions are negated in a sentence.

EXPORT

negation_scope( $text );

SEE ALSO

The NegEx documentation and downloads for java implementation can be found here:

http://code.google.com/p/negex/

The one exported function, negation_scope(), takes a sentence as inuput and returns '-1' if no negation is found or returns the index of the words that make up the scope of the negation.

AUTHOR

Eduardo Iturrate, <ed@iturrate.com>

COPYRIGHT AND LICENSE

Copyright (C) 2013 by Eduardo Iturrate

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.8.8 or, at your option, any later version of Perl 5 you may have available.