Manual Reference Pages - TEXT::METAPHONE (3)
Text::Metaphone - A modern soundex. Phonetic encoding of words.
my $phoned_word = Metaphone(Schwern);
Metaphone() is a function whereby a string/word is broken down into
a rough approximation of its english phonetic pronunciation. Very
similar in concept and purpose to soundex, but much more
comprehensive in its approach.
$phoned_word = Metaphone($word, $max_phone_len);
Takes a word and encodes it according to the Metaphone algorithm.
The algorithm only deals with alphabetical characters, all else is ignored.
If $max_phone_len is provided, Metaphone will only encode up to that many
characters for each word.
sh is encoded as X, th is encoded as 0. This can be changed
in the metaphone.h header file.
Metaphone algorithm changes
I have made a few minor changes to the traditional metaphone algorithm found
in the books. The most significant one is that it will differenciate between
SCH and SCHW making the former K (As in School) and the latter sh (as in
Schwartz and Schwern).
My changes can be turned off by defining the USE_TRADITIONAL_METAPHONE
flag in metaphone.h.
Due to these changes, any users of Metaphone v1.00 or earlier which have stored
metaphonetic encodings, they should recalculate those with the new verison.
Michael G Schwern <firstname.lastname@example.org>
Text::Soundex - A simpler word hashing algorithm
Text::DoubleMetaphone - Improved metaphone
Text::Phonetic - A collection of phonetic algorithms
Books, Journals and Magazines
Binstock, Andrew & Rex, John. Metaphone: A Modern Soundex. Practical Algorithms For Programmers. Reading, Mass: Addion-Wesley, 1995 pp160-169
Contains an explaination of the basic metaphone concept & algorithm and C code
from which I learned of Metaphone and ported this module.
Parker, Gary. A Better Phonetic Search. C Gazette, Vol. 5, No. 4 (June/July), 1990.
This is the public-domain C version of metaphone from which Binstock & Rex
based their own.. I havent actually read it.
Philips, Lawrence. Computer Language, Vol. 7, No. 12 (December), 1990.
And heres the original Metaphone algorithm as presented in Pick BASIC.
COPYRIGHT and LICENSE
Copyright (c) 1997, 1999, 2007-2008 Michael G Schwern. All Rights Reserved.
This program is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
|perl v5.20.3 ||METAPHONE (3) ||2008-10-17 |
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