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;
020
021import java.util.List;
022
023import org.semanticweb.owlapi.model.OWLClassExpression;
024
025/**
026 * Basic interface for algorithms learning OWL/DL class expressions.
027 * 
028 * @author Jens Lehmann
029 *
030 */
031public interface ClassExpressionLearningAlgorithm extends LearningAlgorithm {
032
033        /**
034         * @see #getCurrentlyBestEvaluatedDescriptions(int)
035         * @param nrOfDescriptions Limit for the number or returned descriptions.
036         * @return The best class descriptions found by the learning algorithm so far.
037         */
038        List<OWLClassExpression> getCurrentlyBestDescriptions(int nrOfDescriptions);
039                
040        /**
041         * Return the best currently found concepts up to some maximum
042         * count (no minimality filter used).
043         * @param nrOfDescriptions Maximum number of descriptions returned.
044         * @return Return value is getCurrentlyBestDescriptions(nrOfDescriptions, 0.0, false).
045         */
046        List<? extends EvaluatedDescription> getCurrentlyBestEvaluatedDescriptions(int nrOfDescriptions);
047        
048}