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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.modularity;
import java.util.Set;
import org.semanticweb.owlapi.model.IRI;
import org.semanticweb.owlapi.model.OWLAxiom;
import org.semanticweb.owlapi.model.OWLEntity;
import org.semanticweb.owlapi.model.OWLOntology;
import org.semanticweb.owlapi.model.OWLOntologyChangeException;
import org.semanticweb.owlapi.model.OWLOntologyCreationException;
import org.semanticweb.owlapi.reasoner.OWLReasoner;
/**
* An interface for any class implementing ontology segmentation or modularisation.
* @author Thomas Schneider
* @author School of Computer Science
* @author University of Manchester
*/
public interface OntologySegmenter {
/**
* Returns a set of axioms that is a segment of the ontology associated with this segmenter.
* This segment is determined by the specified seed signature (set of entities).
* @param signature the seed signature
* @return the segment as a set of axioms
*/
public abstract Set extract(Set signature);
/**
* Returns a set of axioms that is a segment of the ontology associated with this segmenter.
* This segment is determined by a seed signature (set of entities),
* which is the specified signature plus possibly all superclasses and/or subclasses of the classes therein.
* Sub-/superclasses are determined using the specified reasoner.
* @param signature the seed signature
* @param superClassLevel determines whether superclasses are added to the signature before segment extraction, see below for admissible values
* @param subClassLevel determines whether subclasses are added to the signature before segment extraction, see below for admissible values
* @param reasoner the reasoner to determine super-/subclasses
* @return the segment as a set of axioms
* Meaning of the value of superClassLevel, subClassLevel:
* Let this value be k. If k > 0, then all classes are included that are (direct or indirect) super-/subclasses of some class in signature,
* with a distance of at most k to this class in the class hierarchy computed by reasoner. If k = 0, then no
* super-/subclasses are added. If k < 0, then all direct and indirect super-/subclasses of any class in the signature
* are added.
*/
public abstract Set extract(Set signature, int superClassLevel, int subClassLevel, OWLReasoner reasoner);
/**
* Returns an ontology that is a segment of the ontology associated with this segmenter.
* @param signature the seed signature (set of entities) for the module
* @param iri the URI for the module
* @return the module, having the specified URI
* @throws OWLOntologyChangeException if adding axioms to the module fails
* @throws OWLOntologyCreationException if the module cannot be created
*/
public abstract OWLOntology extractAsOntology(Set signature, IRI iri) throws OWLOntologyCreationException;
/**
* Returns an ontology that is a segment of the ontology associated with this segmenter.
* This segment is determined by a seed signature (set of entities),
* which is the specified signature plus possibly all superclasses and/or subclasses of the classes therein.
* Sub-/superclasses are determined using the specified reasoner.
* @param signature the seed signature
* @param iri the URI for the module
* @param superClassLevel determines whether superclasses are added to the signature before segment extraction, see below for admissible values
* @param subClassLevel determines whether subclasses are added to the signature before segment extraction, see below for admissible values
* @param reasoner the reasoner to determine super-/subclasses
* @return the segment as a set of axioms
* @throws OWLOntologyChangeException if adding axioms to the module fails
* @throws OWLOntologyCreationException if the module cannot be created
* Meaning of the value of superClassLevel, subClassLevel:
* Let this value be k. If k > 0, then all classes are included that are (direct or indirect) super-/subclasses of some class in signature,
* with a distance of at most k to this class in the class hierarchy computed by reasoner. If k = 0, then no
* super-/subclasses are added. If k < 0, then all direct and indirect super-/subclasses of any class in the signature
* are added.
*/
public abstract OWLOntology extractAsOntology(Set signature, IRI iri, int superClassLevel, int subClassLevel, OWLReasoner reasoner) throws OWLOntologyCreationException;
}
