001/**
002 * Copyright (C) 2007 - 2016, Jens Lehmann
003 *
004 * This file is part of DL-Learner.
005 *
006 * DL-Learner is free software; you can redistribute it and/or modify
007 * it under the terms of the GNU General Public License as published by
008 * the Free Software Foundation; either version 3 of the License, or
009 * (at your option) any later version.
010 *
011 * DL-Learner is distributed in the hope that it will be useful,
012 * but WITHOUT ANY WARRANTY; without even the implied warranty of
013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
014 * GNU General Public License for more details.
015 *
016 * You should have received a copy of the GNU General Public License
017 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
018 */
019package org.dllearner.core.fuzzydll;
020
021import java.util.SortedSet;
022
023import org.dllearner.core.owl.fuzzydll.FuzzyIndividual;
024import org.semanticweb.owlapi.model.OWLClassExpression;
025
026/**
027 * Reasoning requests/queries related to fuzzy reasoning over individuals in the knowledge base.
028 * 
029 * @author Josue Iglesias
030 *
031 */
032public interface FuzzyIndividualReasoner {
033        
034        /**
035         * Checks the fuzzy membership degree of <code>individual</code> over <code>description</code>.
036         * For instance, "Peter" may be an instance of "TallPerson" with fuzzy membership degree = 0.8.
037         * individual
038         * @param description An OWL class description.
039         * @param individual An individual.
040         * @return fuzzy membership degree of <code>individual</code> satisfying <code>description</code> [0-1].
041         */
042        double hasTypeFuzzyMembership(OWLClassExpression description, FuzzyIndividual individual);
043        
044        SortedSet<FuzzyIndividual> getFuzzyIndividuals(OWLClassExpression concept);
045}