1.1 Origin and Copyright

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.