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/* Part of SWI-Prolog
Author: Giorgos Stoilos and Jan Wielemaker
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
As a special exception, if you link this library with other files,
compiled with a Free Software compiler, to produce an executable, this
library does not by itself cause the resulting executable to be covered
by the GNU General Public License. This exception does not however
invalidate any other reasons why the executable file might be covered by
the GNU General Public License.
*/
:- module(isub,
[ isub/4 % +Text1, +Text2, +Normalize, -Distance
]).
:- use_foreign_library(foreign(isub)).
/** <module> isub: a string similarity measure
The library(isub) implements a similarity measure between strings, i.e.,
something similar to the _|Levenshtein distance|_. This method is based
on the length of common substrings.
@author Giorgos Stoilos
@see _|A string metric for ontology alignment|_ by Giorgos Stoilos,
2005.
*/
%% isub(+Text1:atomic, +Text2:atomic, +Normalize:bool,
%% -Similarity:float) is det.
%
% Similarity is a measure for the distance between Text1 and
% Text2. E.g.
%
% ==
% ?- isub('E56.Language', 'languange', true, D).
% D = 0.711348.
% ==
%
% If Normalize is =true=, isub/4 applies string normalization as
% implemented by the original authors: Text1 and Text2 are mapped
% to lowercase and the characters "._ " are removed. Lowercase
% mapping is done with the C-library function towlower(). In
% general, the required normalization is domain dependent and is
% better left to the caller. See e.g., unaccent_atom/2.
%
% @param Similarity is a float in the range [0.0..1.0], where 1.0
% means _|most similar|_
:- multifile sandbox:safe_primitive/1.
sandbox:safe_primitive(isub:isub(_,_,_,_)).
|
