The Double Metaphone algorithm is copied from the Perl library that
holds the following copyright notice. To the best of our knowledge the
Perl license is compatible to the SWI-Prolog license schema and
therefore including this module poses no additional license conditions.
Copyright 2000, Maurice Aubrey <maurice@hevanet.com>.
All rights reserved.
This code is based heavily on the C++ implementation by Lawrence
Philips and incorporates several bug fixes courtesy of Kevin Atkinson
<kevina@users.sourceforge.net>.
This module is free software; you may redistribute it and/or modify
it under the same terms as Perl itself.
