org.semanticweb.elk.reasoner.saturation.conclusions.model.BackwardLink Maven / Gradle / Ivy
package org.semanticweb.elk.reasoner.saturation.conclusions.model;
/*
* #%L
* ELK Reasoner
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* $HeadURL:$
* %%
* Copyright (C) 2011 - 2016 Department of Computer Science, University of Oxford
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* 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.
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import org.semanticweb.elk.reasoner.indexing.model.IndexedContextRoot;
import org.semanticweb.elk.reasoner.indexing.model.IndexedObjectProperty;
/**
* A {@link ClassConclusion} representing an inclusion between an axiom and an
* existential restriction.
*
* Notation:
*
* {@code
* C ⊑ <∃P>.[D]
* }
*
* It is logically equivalent to axiom
* {@code SubClassOf(C ObjectSomeValuesFrom(P D))}
*
* The parameters can be obtained as follows:
*
* C = {@link #getSource()}
* P = {@link #getRelation()}
* D = {@link #getDestination()}
*
* @author Frantisek Simancik
* @author "Yevgeny Kazakov"
*/
public interface BackwardLink extends SubClassConclusion {
public static final String NAME = "Backward Link";
/**
* @return the property expression of the existential relation between
* {@link #getSource()} and {@link #getDestination()}
*/
public IndexedObjectProperty getRelation();
/**
* @return the representation of the concept from which the existential
* restriction corresponding to this {@link BackwardLink} follows
*/
public IndexedContextRoot getSource();
public O accept(Visitor visitor);
/**
* A factory for creating instances
*
* @author Yevgeny Kazakov
*
*/
interface Factory {
BackwardLink getBackwardLink(IndexedContextRoot destination,
IndexedObjectProperty relation, IndexedContextRoot source);
}
/**
* The visitor pattern for instances
*
* @author Yevgeny Kazakov
*
* @param
* the type of the output
*/
interface Visitor {
public O visit(BackwardLink conclusion);
}
}