001    /**
002     * Copyright (C) 2007-2011, 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     */
019    
020    package org.dllearner.core.owl;
021    
022    import java.io.Serializable;
023    import java.util.Map;
024    
025    /**
026     * Interface for all elements of the knowledge base.
027     * 
028     * @author Jens Lehmann
029     *
030     */
031    public interface KBElement extends Serializable{
032            
033            /**
034             * Gets the length of this knowledge base element. For instance,
035             * A AND B should have length 3 (as three constructs are involved).
036             * There are different ways to define the length of an axiom,
037             * class description etc., but this method provides a straightforward
038             * definition of it.
039             * 
040             * @return The syntactic length of the KB element, defined as the
041             * number of syntactic constructs not including brackets.
042             */
043            public int getLength();
044            
045        public String toString(String baseURI, Map<String,String> prefixes);
046        
047        public String toKBSyntaxString(String baseURI, Map<String,String> prefixes);
048        
049            public String toManchesterSyntaxString(String baseURI, Map<String, String> prefixes);
050            
051        public void accept(KBElementVisitor visitor);
052    
053    }