org.semanticweb.elk.reasoner.indexing.model.HasPositiveOccurrence Maven / Gradle / Ivy
package org.semanticweb.elk.reasoner.indexing.model;
/*-
* #%L
* ELK Reasoner Core
* $Id:$
* $HeadURL:$
* %%
* Copyright (C) 2011 - 2021 Department of Computer Science, University of Oxford
* %%
* 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.
* #L%
*/
/**
* An object that may occur positively in the ontology.
*
* @author Yevgeny Kazakov
*/
public interface HasPositiveOccurrence {
/**
* @return {@code true} if this object occurs with the positive polarity in
* the current ontology, for example, in the right-hand side of
* concept inclusions or in complex equivalences
*/
boolean occursPositively();
}