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/*
 * #%L
 * ELK Reasoner
 * $Id:$
 * $HeadURL:$
 * %%
 * Copyright (C) 2011 - 2016 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%
 */
package org.semanticweb.elk.reasoner.taxonomy.model;

import java.util.Set;

import org.semanticweb.elk.owl.interfaces.ElkEntity;

/**
 * A taxonomy node that is not a bottom node.
 * 
 * @author Peter Skocovsky
 *
 * @param 
 *            The type of members of this node.
 */
public interface NonBottomTaxonomyNode
		extends TaxonomyNode {

	/**
	 * Returns immutable set of direct super-nodes.
	 * 
	 * @return immutable set of direct super-nodes.
	 * @see TaxonomyNode#getDirectSuperNodes()
	 */
	Set> getDirectNonBottomSuperNodes();

	/**
	 * Returns immutable set of direct sub-nodes that does not
	 * contain the bottom node.
	 * 
	 * @return immutable set of direct sub-nodes that does not
	 * contain the bottom node.
	 */
	Set> getDirectNonBottomSubNodes();

}