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/*
 * This file is part of the OWL API.
 *
 * The contents of this file are subject to the LGPL License, Version 3.0.
 *
 * Copyright (C) 2011, The University of Manchester
 *
 * 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 3 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 program.  If not, see http://www.gnu.org/licenses/.
 *
 *
 * Alternatively, the contents of this file may be used under the terms of the Apache License, Version 2.0
 * in which case, the provisions of the Apache License Version 2.0 are applicable instead of those above.
 *
 * Copyright 2011, University of Manchester
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.semanticweb.owlapi.reasoner;
/**
 * Author: Matthew Horridge

 * The University of Manchester

 * Information Management Group

 * Date: 09-Dec-2009
 * 
 * The policy of how a reasoner will return NodeSets of individuals for queries that return node sets of
 * named individuals such as
 * {@link org.semanticweb.owlapi.reasoner.OWLReasoner#getTypes(org.semanticweb.owlapi.model.OWLNamedIndividual, boolean)} 
 * or {@link org.semanticweb.owlapi.reasoner.OWLReasoner#getInstances(org.semanticweb.owlapi.model.OWLClassExpression, boolean)}.
 */
public enum IndividualNodeSetPolicy {

    /**
     * Indicates that NodeSets of named individuals returned by the reasoner will contain Nodes
     * that group individuals which are entailed to be the same as each other.  For example, if i,
     * j and k are individuals, and they are instances of C, and i
     * is entailed to be the same as j then asking for the instances of A will return a
     * NodeSet containing two Nodes, one containing i and j and the
     * other containing k.
     */
    BY_SAME_AS,

    /**
     * Indicates that NodeSets of named individuals will always contain singleton Nodes and
     * individuals that are the same as each other will not be grouped together in one Node within the
     * NodeSet.For example, if i,
     * j and k are individuals, and they are instances of C, and i
     * is entailed to be the same as j then asking for the instances of A will return a
     * NodeSet containing three Nodes, one containing i, one containing
     * j and the third containing k.
     */
    BY_NAME,

}