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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 2011, Ulm University
*
* 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.
* 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.krss2.renderer;
import static org.semanticweb.owlapi.krss2.renderer.KRSS2Vocabulary.*;
import static org.semanticweb.owlapi.model.parameters.Imports.*;
import static org.semanticweb.owlapi.search.EntitySearcher.*;
import static org.semanticweb.owlapi.search.Searcher.*;
import static org.semanticweb.owlapi.util.CollectionFactory.sortOptionally;
import static org.semanticweb.owlapi.util.OWLAPIStreamUtils.*;
import java.io.Writer;
import java.util.Collection;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
import java.util.stream.Stream;
import org.semanticweb.owlapi.model.*;
import org.semanticweb.owlapi.search.Filters;
/**
* {@code KRSS2ObjectRenderer} is an extension of {@link KRSSObjectRenderer
* KRSSObjectRenderer} which uses the extended vocabulary.
* Abbreviations
*
*
*
CN
*
concept name
*
*
*
C,D,E
*
concept expression
*
*
*
RN
*
role name
*
*
*
R, R1, R2,...
*
role expressions, i.e. role name or inverse role
*
*
*
* KRSS concept language
*
*
*
KRSS
*
OWLClassExpression
*
*
*
(at-least n R C)
*
(OWLObjectMinCardinality R n C)
*
*
*
(at-most n R C)
*
(OWLObjectMaxCardinality R n C)
*
*
*
(exactly n R C)
*
(OWLObjectExactCardinality R n C)
*
*
*
(some R C)
*
(OWLObjectSomeValuesFrom R C)
*
*
*
(all R C)
*
(OWLObjectAllValuesFrom R C)
*
*
*
(not C)
*
(OWLObjectComplementOf C)
*
*
*
(and C D E)
*
(OWLObjectIntersectionOf C D E)
*
*
*
(or C D E)
*
(OWLObjectUnionOf C D E)
*
*
*
* KRSS role language
*
*
*
KRSS
*
OWLObjectPropertyExpression
*
*
*
(inv R)
*
(OWLInverseObjectPropertiesAxiom R)
*
*
*
* Each referenced class, object property as well as individual is defined using
* define-concept resp. define-primitive-concept,
* define-role and define-individual. In addition, axioms are
* translated as follows.
*
*
*
KRSS2
*
OWLAxiom
*
KRSS syntax
*
Remarks
*
*
*
OWLEquivalentClasses
*
(define-concept C D)
*
OWLEquivalentClasses C D1 D2...Dn will be translated to:
* (define-concept C (and D1 D2...Dn))
* Only applicable if there is no OWLSubClassOf axiom.
*
OWLSubClassOfAxiom C D1...Dn (n > 1) will be translated to:
* (define-primitive-concept C (and D1...Dn))
* Only applicable if there is no OWLEquivalentClasses axiom. In that case the
* class will be introduced via (define-concept...) and all subclass axioms are
* handled via implies
*
*
*
OWLSubClassOfAxiom
*
(implies D C)
*
Only in case of GCIs with concept expression (not named class) D, or in
* case that D is a non-primitive concept. Otherwise superclasses are introduced
* via (define-primitive-concept D ...)
*
*
*
OWLEquivalentObjectPropertiesAxiom
*
(roles-equivalent r s)
*
All roles are explicitly introduced via define-primitive-role.
*
*
*
OWLSubPropertyChainOfAxiom
*
(role-inclusion (compose r s) t)
*
Role inclusions of the kind (role-inclusion (compose r s) r) resp.
* (role-inclusion (compose s r) r) are handled within the
* (define-primitive-role) statement as right- resp. left-identities iff it is
* the only role-inclusion wrt. the super property.
*
*
*
OWLSubObjectPropertyAxiom
*
(define-primitive-role R :parent S)
* (define-primitive-role R :parents S T U)
* Additional attributes:
*
*
:transitive t
*
:symmetric t
*
:reflexive t
*
:inverse I
*
:domain C resp. :domain (and C C1...Cn)
*
:range D resp. :range (and D D1..Dn)
*
*
*
This will be only used if there is no OWLEquivalentClasses axiom
* containing R (see define-role). The additional attributes are added if there
* is an OWLTransitiveObjectProperyAxiom, OWLSymmetricObjectPropertyAxiom,
* OWLReflexiveObjectPropertyAxiom, OWLObjectPropertyDomainAxiom,
* OWLObjectPropertyRangeAxiom resp. OWLInverseObjectPropertiesAxiom. If there
* are multiple OWLInverseObjectPropertiesAxioms only one inverse is handled
* here, all others are handled via (inverse) statements. Domains/ranges of
* multiple domain/range axioms are handled as (and C C1...Cn).
*
*
*
OWLSubObjectPropertyAxiom
*
(implies-role r s)
*
Only applicable if r is an inverse property, otherwise superproperties
* are handled within the define-primitive-role statement.
*
*
*
OWLInverseObjectPropertiesAxiom
*
(inverse r s)
*
Only inverse properties which are not introduced via
* define-primitive-role.
*
*
*
OWLObjectPropertyRangeAxiom
*
*
see define-primitive-role
*
*
*
OWLObjectPropertyDomainAxiom
*
*
see define-primitive-role
*
*
*
OWLSymmetricObjectPropertyAxiom
*
*
see define-primitive-role
*
*
*
OWLTransitiveObjectPropertyAxiom
*
*
see define-primitive-role
*
*
*
OWLReflexiveObjectPropertyAxiom
*
*
see define-primitive-role
*
*
*
OWLClassAssertionAxiom
*
(instance i D)
*
*
*
OWLDifferentIndividualsAxiom
*
(distinct i1 i2)
*
OWLDifferentIndividualsAxiom i1 i2 ... in will be splitted into:
*
* { (distinct i(j) i(j+k)) | 1 <= j <=n, j<k<=n, j=|=k}
*
*
*
*
OWLObjectPropertyAssertionAxiom
*
(related i1 P i2)
*
i1: subject, i2: object
*
*
*
OWLSameIndividualsAxiom
*
(equal i1 i2)
*
OWLSameIndividual i1 i2 ...i(n-1) in in will be splitted into:
* { (equal i(j) i(j+k)) | 1 <= j <=n, j<k<=n, j=|=k}
* (equal i1 i2)
* (equal i1 i3)
* ...
* (equal i(n-1) in)
*
*
*
* @author Olaf Noppens, Ulm University, Institute of Artificial Intelligence
*/
public class KRSS2ObjectRenderer extends KRSSObjectRenderer {
private final Set leftRightIdentityUsed;
/**
* If declarations are ignored, entities which are only referenced in a
* declaration are not rendered.
*/
protected boolean ignoreDeclarations = false;
/**
* @param ontology
* ontology to render
* @param writer
* writer to render to
*/
public KRSS2ObjectRenderer(OWLOntology ontology, Writer writer) {
super(ontology, writer);
leftRightIdentityUsed = new HashSet<>();
}
/**
* @param ignoreDeclarations
* true if declarations should be ignored
*/
public void setIgnoreDeclarations(boolean ignoreDeclarations) {
this.ignoreDeclarations = ignoreDeclarations;
}
@Override
protected void write(KRSS2Vocabulary v) {
write(v.toString());
}
@Override
public void visit(OWLOntology ontology) {
reset();
for (OWLClass eachClass : asList(ontology.classesInSignature())) {
if (ignoreDeclarations && ontology.axioms(eachClass).count() == 1 && ontology.declarationAxioms(eachClass)
.count() == 1) {
continue;
}
boolean primitive = !isDefined(eachClass, ontology);
writeOpenBracket();
if (primitive) { // there is no equivalentclasses axiom!
write(DEFINE_PRIMITIVE_CONCEPT);
write(eachClass);
writeSpace();
flatten(sortOptionally(sup(ontology.axioms(Filters.subClassWithSub, eachClass, INCLUDED),
OWLClassExpression.class)));
writeCloseBracket();
writeln();
Collection classes = asList(equivalent(ontology.equivalentClassesAxioms(eachClass),
OWLClassExpression.class));
for (OWLClassExpression description : classes) {
writeOpenBracket();
write(eachClass);
write(EQUIVALENT);
write(description);
writeCloseBracket();
writeln();
}
} else {
writeOpenBracket();
write(DEFINE_CONCEPT);
write(eachClass);
flatten(sortOptionally(equivalent(ontology.equivalentClassesAxioms(eachClass),
OWLClassExpression.class)));
writeCloseBracket();
writeln();
Collection supclasses = asList(sup(ontology.subClassAxiomsForSubClass(eachClass),
OWLClassExpression.class));
for (OWLClassExpression description : supclasses) {
writeOpenBracket();
write(eachClass);
write(IMPLIES);
write(description);
writeCloseBracket();
writeln();
}
}
}
for (OWLObjectProperty property : sortOptionally(ontology.objectPropertiesInSignature())) {
if (ignoreDeclarations && ontology.axioms(property, EXCLUDED).count() == 1 && ontology.declarationAxioms(
property).count() == 1) {
continue;
}
writeOpenBracket();
Stream streamp = equivalent(ontology.equivalentObjectPropertiesAxioms(
property));
Collection properties = asList(streamp);
boolean isPrimitive = properties.isEmpty();
if (isPrimitive) {
write(DEFINE_PRIMITIVE_ROLE);
write(property);
List superProperties = sortOptionally(sup(ontology.axioms(
Filters.subObjectPropertyWithSub, property, INCLUDED), OWLObjectPropertyExpression.class));
int superSize = superProperties.size();
if (superSize == 1) {
writeSpace();
write(PARENT_ATTR);
writeSpace();
write(superProperties.iterator().next());
} else if (superSize > 1) {
writeSpace();
write(PARENTS_ATTR);
writeSpace();
flattenProperties(superProperties, null);
} else {
// right/left identity?
// we only allow for either right or left identity axiom,
// otherwise it is
// expressed via role-inclusion axioms
Collection chainAxioms = getPropertyChainSubPropertyAxiomsFor(property);
if (chainAxioms.size() == 1) {
OWLSubPropertyChainOfAxiom axiom = chainAxioms.iterator().next();
if (isLeftIdentityAxiom(axiom, property)) {
leftRightIdentityUsed.add(axiom);
writeSpace();
write(LEFTIDENTITY_ATTR);
write(axiom.getPropertyChain().get(0));
} else if (isRightIdentityAxiom(axiom, property)) {
leftRightIdentityUsed.add(axiom);
writeSpace();
write(RIGHTIDENTITY_ATTR);
write(axiom.getPropertyChain().get(1));
}
}
}
} else {
if (properties.isEmpty()) {
write(DEFINE_PRIMITIVE_ROLE);
write(property);
writeSpace();
} else {
write(DEFINE_ROLE);
write(property);
OWLObjectPropertyExpression expr = properties.iterator().next();
write(expr);
properties.remove(expr);
writeSpace();
}
}
if (isTransitive(property, ontology)) {
writeSpace();
write(TRANSITIVE_ATTR);
writeSpace();
write(TRUE);
}
if (isSymmetric(property, ontology)) {
writeSpace();
write(SYMMETRIC_ATTR);
writeSpace();
write(TRUE);
}
if (isReflexive(property, ontology)) {
writeSpace();
write(REFLEXIVE_ATTR);
writeSpace();
write(TRUE);
}
Iterator inverses = inverse(ontology.inverseObjectPropertyAxioms(property),
property).iterator();
if (!inverses.hasNext()) {
writeSpace();
write(INVERSE_ATTR);
write(inverses.next());
}
List stream = sortOptionally(domain(ontology.objectPropertyDomainAxioms(property)));
if (!stream.isEmpty()) {
writeSpace();
write(DOMAIN_ATTR);
flatten(stream);
}
stream = sortOptionally(range(ontology.objectPropertyRangeAxioms(property)));
if (!stream.isEmpty()) {
writeSpace();
write(RANGE_ATTR);
flatten(stream);
}
writeCloseBracket();
writeln();
while (inverses.hasNext()) {
writeOpenBracket();
write(INVERSE);
write(property);
write(inverses.next());
writeOpenBracket();
writeln();
}
for (OWLObjectPropertyExpression expr : properties) {
writeOpenBracket();
write(ROLES_EQUIVALENT);
write(property);
write(expr);
writeCloseBracket();
writeln();
}
}
for (OWLNamedIndividual individual : sortOptionally(ontology.individualsInSignature())) {
if (ignoreDeclarations && ontology.axioms(individual, EXCLUDED).count() == 1 && ontology.declarationAxioms(
individual).count() == 1) {
continue;
}
writeOpenBracket();
write(DEFINE_INDIVIDUAL);
write(individual);
writeCloseBracket();
writeln();
}
ontology.axioms().forEach(a -> a.accept(this));
writer.flush();
}
@Override
public void visit(OWLSubClassOfAxiom axiom) {
// we only handle GCIs
if (!(axiom.getSubClass() instanceof OWLClass)) {
writeOpenBracket();
write(IMPLIES);
write(axiom.getSubClass());
write(axiom.getSuperClass());
writeCloseBracket();
writeln();
}
}
@Override
public void visit(OWLEquivalentObjectPropertiesAxiom axiom) {
pairs(axiom.properties()).forEach(v -> {
writeOpenBracket();
write(ROLES_EQUIVALENT);
write(v.i);
write(v.j);
writeCloseBracket();
writeln();
});
}
@Override
public void visit(OWLDisjointObjectPropertiesAxiom axiom) {
pairs(axiom.properties()).forEach(v -> {
writeOpenBracket();
write(DISJOINT_ROLES);
write(v.i);
write(v.j);
writeCloseBracket();
writeln();
});
}
@Override
public void visit(OWLSubObjectPropertyOfAxiom axiom) {
if (!axiom.getSubProperty().isOWLObjectProperty()) {
writeOpenBracket();
write(IMPLIES_ROLE);
write(axiom.getSubProperty());
write(axiom.getSuperProperty());
writeCloseBracket();
writeln();
}
}
@Override
public void visit(OWLEquivalentClassesAxiom axiom) {
pairs(axiom.classExpressions()).forEach(v -> {
writeOpenBracket();
write(EQUIVALENT);
write(v.i);
write(v.j);
writeCloseBracket();
writeln();
});
}
@Override
public void visit(OWLSubPropertyChainOfAxiom axiom) {
if (leftRightIdentityUsed.contains(axiom)) {
return;
}
writeOpenBracket();
write(ROLE_INCLUSTION);
writeSpace();
writeChain(axiom.getPropertyChain(), 0);
writeSpace();
write(axiom.getSuperProperty());
writeCloseBracket();
writeln();
}
protected void writeChain(List expressions, int i) {
if (i == expressions.size() - 1) {
write(expressions.get(i));
} else {
writeOpenBracket();
write(COMPOSE);
write(expressions.get(i));
writeChain(expressions, i + 1);
writeCloseBracket();
}
}
@Override
public void visit(OWLInverseObjectPropertiesAxiom axiom) {
writeOpenBracket();
write(INVERSE);
axiom.getFirstProperty().accept(this);
axiom.getSecondProperty().accept(this);
writeCloseBracket();
writeln();
}
@Override
public void visit(OWLObjectOneOf ce) {
writeOpenBracket();
write(ONE_OF);
ce.individuals().forEach(this::write);
writeCloseBracket();
}
@Override
public void visit(OWLObjectInverseOf property) {
writeOpenBracket();
write(INV);
writeSpace();
property.getInverseProperty();
property.getInverse().accept(this);
writeCloseBracket();
}
protected static boolean isLeftIdentityAxiom(OWLSubPropertyChainOfAxiom axiom, OWLObjectProperty property) {
if (axiom.getSuperProperty().equals(property)) {
List propertyChain = axiom.getPropertyChain();
if (propertyChain.size() < 3) {
return false;
}
if (propertyChain.get(0).isOWLObjectProperty() && propertyChain.get(1).equals(property)) {
return propertyChain.size() > 2;
}
}
return false;
}
protected static boolean isRightIdentityAxiom(OWLSubPropertyChainOfAxiom axiom, OWLObjectProperty property) {
if (axiom.getSuperProperty().equals(property)) {
List propertyChain = axiom.getPropertyChain();
if (propertyChain.size() < 2) {
return false;
}
if (propertyChain.get(0).equals(property)) {
return propertyChain.size() > 2;
}
}
return false;
}
protected Collection getPropertyChainSubPropertyAxiomsFor(
OWLPropertyExpression property) {
return asList(ont.axioms(AxiomType.SUB_PROPERTY_CHAIN_OF).filter(a -> a.getSuperProperty().equals(property)));
}
protected void reset() {
leftRightIdentityUsed.clear();
}
}
