get_relationship_types.pl - Find all the relationship types in a given ontology.
This script retrieves all the relationship types in a given ontology.
Erick Antezana, <erick.antezana -@- gmail.com>
Copyright (c) 2006-2014 by Erick Antezana
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.8.7 or, at your option, any later version of Perl 5 you may have available.