package it.unibz.inf.ontop.spec.ontology;

/*
 * #%L
 * ontop-obdalib-core
 * %%
 * Copyright (C) 2009 - 2014 Free University of Bozen-Bolzano
 * %%
 * 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%
 */

/**
 * Represents the following from OWL 2 QL Specification:
 * 
 * for T = ClassExpression: 
 * 			SubClassOf, EquivalentClasses, 
 *          ObjectPropertyDomain, ObjectPropertyRange, 
 *          DataPropertyDomain 
 *        
 * for T = DataRangeExpression:
 * 			DataPropertyRange 
 *          (sub is DataPropertyRangeExpression; super is Datatype)  
 *          
 * for T = ObjectPropertyExpression:
 *      SubObjectPropertyOf, EquivalentObjectProperties, SymmetricObjectProperties
 *      
 * for T = DataPropertyExpression:      
 *      SubDataPropertyOf, EquivalentDataProperties 
 * 
 * @author roman
 *
 */

public interface BinaryAxiom<T> {

	T getSub();

	T getSuper();
}
