Lingua::ConText - Perl extension for finding the context of a word in a sentence.
use Lingua::ConText qw( applyContext ); my $text = 'The patient denied a history of pneumonia.'; my $result = applyContext( 'pneumonia', $text ); print join "\n", @{$result}; # pneumonia # The patient denied a history of pneumonia. # negated # historical # patient
This is a perl implementation of the ConText algorithm which uses a list of phrases to determine the context of a given concept within a sentence.
This is a port from the java code authored by Stephane Meystre, Julien Charles Thibault, Oscar Ferrandez Escamez made available online.
None by default.
return [ $concept, $sentence, $negation_context, $temporality_context, $experiencer_context ]; $negation_context; # affirmed, negated, possible $temporality_context; # recent, hypothetical, historical $experiencer_context; # patient, other
The ConText documentation and downloads for java implementation can be found here:
http://code.google.com/p/negex/
Background information:
Chapman WW, Dowling JN, Chu DL. ConText: An algorithm for identifying contextual features from clinical text. In: BioNLP Workshop of the Association for Computational Linguistics Prague, Czech Republic; 2007. p. 81-88.
Harkema H, Thornblade T, Dowling J, Chapman WW. Portability of ConText: An Algorithm for determining Negation, Experiencer, and Temporal Status from Clinical Reports. J Biomed Inform. 2009;42(5):839-851.
http://www.ncbi.nlm.nih.gov/pubmed/21459155
Eduardo Iturrate, <ed@iturrate.com>
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.
To install Lingua::ConText, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Lingua::ConText
CPAN shell
perl -MCPAN -e shell install Lingua::ConText
For more information on module installation, please visit the detailed CPAN module installation guide.