org.semanticweb.owlapi.model

Interface OWLClassExpression

All Superinterfaces:

AsOWLClass, Comparable<OWLObject>, HasAnnotationPropertiesInSignature, HasAnonymousIndividuals, HasClassesInSignature, HasComponents, HasContainsEntityInSignature, HasDataPropertiesInSignature, HasDatatypesInSignature, HasHashIndex, HasIndex, HasIndividualsInSignature, HasObjectPropertiesInSignature, HasSignature, IsAnonymous, OWLObject, OWLPropertyRange, Serializable, SWRLPredicate

All Known Subinterfaces:

OWLAnonymousClassExpression, OWLBooleanClassExpression, OWLCardinalityRestriction<F>, OWLClass, OWLDataAllValuesFrom, OWLDataCardinalityRestriction, OWLDataExactCardinality, OWLDataHasValue, OWLDataMaxCardinality, OWLDataMinCardinality, OWLDataRestriction, OWLDataSomeValuesFrom, OWLHasValueRestriction<V>, OWLNaryBooleanClassExpression, OWLObjectAllValuesFrom, OWLObjectCardinalityRestriction, OWLObjectComplementOf, OWLObjectExactCardinality, OWLObjectHasSelf, OWLObjectHasValue, OWLObjectIntersectionOf, OWLObjectMaxCardinality, OWLObjectMinCardinality, OWLObjectOneOf, OWLObjectRestriction, OWLObjectSomeValuesFrom, OWLObjectUnionOf, OWLQuantifiedDataRestriction, OWLQuantifiedObjectRestriction, OWLQuantifiedRestriction<F>, OWLRestriction

All Known Implementing Classes:

OWLAnonymousClassExpressionImpl, OWLCardinalityRestrictionImpl, OWLClassExpressionImpl, OWLClassImpl, OWLDataAllValuesFromImpl, OWLDataCardinalityRestrictionImpl, OWLDataExactCardinalityImpl, OWLDataHasValueImpl, OWLDataMaxCardinalityImpl, OWLDataMinCardinalityImpl, OWLDataSomeValuesFromImpl, OWLNaryBooleanClassExpressionImpl, OWLObjectAllValuesFromImpl, OWLObjectCardinalityRestrictionImpl, OWLObjectComplementOfImpl, OWLObjectExactCardinalityImpl, OWLObjectHasSelfImpl, OWLObjectHasValueImpl, OWLObjectIntersectionOfImpl, OWLObjectMaxCardinalityImpl, OWLObjectMinCardinalityImpl, OWLObjectOneOfImpl, OWLObjectSomeValuesFromImpl, OWLObjectUnionOfImpl, OWLQuantifiedDataRestrictionImpl, OWLQuantifiedObjectRestrictionImpl, OWLQuantifiedRestrictionImpl, OWLValueRestrictionImpl

public interface OWLClassExpression
extends OWLObject, OWLPropertyRange, SWRLPredicate, AsOWLClass

Represents Class Expressions in the OWL 2 specification. This interface covers named and anonymous classes.

Since:

2.0.0

Author:

Matthew Horridge The University Of Manchester Bio-Health Informatics Group

Method Summary

Modifier and Type	Method and Description
void	accept(OWLClassExpressionVisitor visitor) Accepts a visit from an OWLExpressionVisitor.
<O> O	accept(OWLClassExpressionVisitorEx<O> visitor)
Set<OWLClassExpression>	asConjunctSet() Interprets this expression as a conjunction and returns the conjuncts.
Set<OWLClassExpression>	asDisjunctSet() Interprets this expression as a disjunction and returns the disjuncts.
default java.util.stream.Stream<OWLClassExpression>	conjunctSet() Interprets this expression as a conjunction and returns the conjuncts.
boolean	containsConjunct(OWLClassExpression ce) Determines if this class expression contains a particular conjunct.
default java.util.stream.Stream<OWLClassExpression>	disjunctSet() Interprets this expression as a disjunction and returns the disjuncts.
ClassExpressionType	getClassExpressionType() Gets the class expression type for this class expression.
OWLClassExpression	getComplementNNF() Gets the negation normal form of the complement of this expression.
OWLClassExpression	getNNF() Gets this expression in negation normal form.
OWLClassExpression	getObjectComplementOf() Gets the object complement of this class expression.
default boolean	isClassExpressionLiteral() Determines if this class is a literal.
boolean	isOWLNothing() Determines if this expression is the built in class owl:Nothing.
boolean	isOWLThing() Determines if this expression is the built in class owl:Thing.

Methods inherited from interface org.semanticweb.owlapi.model.OWLObject

accept, accept, getNestedClassExpressions, hasSharedStructure, isAnonymousExpression, isAxiom, isBottomEntity, isIndividual, isIRI, isOntology, isTopEntity, nestedClassExpressions

Methods inherited from interface java.lang.Comparable

compareTo

Methods inherited from interface org.semanticweb.owlapi.model.HasSignature

getSignature, signature

Methods inherited from interface org.semanticweb.owlapi.model.HasContainsEntityInSignature

containsEntityInSignature

Methods inherited from interface org.semanticweb.owlapi.model.HasAnonymousIndividuals

anonymousIndividuals, getAnonymousIndividuals

Methods inherited from interface org.semanticweb.owlapi.model.HasClassesInSignature

classesInSignature, getClassesInSignature

Methods inherited from interface org.semanticweb.owlapi.model.HasObjectPropertiesInSignature

getObjectPropertiesInSignature, objectPropertiesInSignature

Methods inherited from interface org.semanticweb.owlapi.model.HasDataPropertiesInSignature

dataPropertiesInSignature, getDataPropertiesInSignature

Methods inherited from interface org.semanticweb.owlapi.model.HasIndividualsInSignature

getIndividualsInSignature, individualsInSignature

Methods inherited from interface org.semanticweb.owlapi.model.HasDatatypesInSignature

datatypesInSignature, getDatatypesInSignature

Methods inherited from interface org.semanticweb.owlapi.model.HasAnnotationPropertiesInSignature

annotationPropertiesInSignature, getAnnotationPropertiesInSignature

Methods inherited from interface org.semanticweb.owlapi.model.HasIndex

typeIndex

Methods inherited from interface org.semanticweb.owlapi.model.HasHashIndex

hashIndex

Methods inherited from interface org.semanticweb.owlapi.model.HasComponents

components, componentsAnnotationsFirst, componentsWithoutAnnotations

Methods inherited from interface org.semanticweb.owlapi.model.IsAnonymous

isAnonymous

Methods inherited from interface org.semanticweb.owlapi.model.AsOWLClass

asOWLClass, isOWLClass

Method Detail

getClassExpressionType

ClassExpressionType getClassExpressionType()

Gets the class expression type for this class expression.

Returns:

The class expression type

isClassExpressionLiteral

default boolean isClassExpressionLiteral()

Determines if this class is a literal. A literal being either a named class or the negation of a named class (i.e. A or not(A)).

Returns:

true if this is a literal, or false if this is not a literal.

isOWLThing

boolean isOWLThing()

Determines if this expression is the built in class owl:Thing. This method does not determine if the class is equivalent to owl:Thing.

Returns:

true if this expression is owl:Thing, or false if this expression is not owl:Thing

isOWLNothing

boolean isOWLNothing()

Determines if this expression is the built in class owl:Nothing. This method does not determine if the class is equivalent to owl:Nothing.

Returns:

true if this expression is owl:Nothing, or false if this expression is not owl:Nothing.

getNNF

OWLClassExpression getNNF()

Gets this expression in negation normal form.

Returns:

The expression in negation normal form.

getComplementNNF

OWLClassExpression getComplementNNF()

Gets the negation normal form of the complement of this expression.

Returns:

A expression that represents the NNF of the complement of this expression.

getObjectComplementOf

OWLClassExpression getObjectComplementOf()

Gets the object complement of this class expression.

Returns:

A class expression that is the complement of this class expression.

conjunctSet

default java.util.stream.Stream<OWLClassExpression> conjunctSet()

Interprets this expression as a conjunction and returns the conjuncts. This method does not normalise the expression (full CNF is not computed).

Returns:

The conjucts of this expression if it is a conjunction (object intersection of), or otherwise a singleton set containing this expression. Note that nested conjunctions will be flattened, for example, calling this method on (A and B) and C will return the set {A, B, C}

asConjunctSet

Set<OWLClassExpression> asConjunctSet()

Interprets this expression as a conjunction and returns the conjuncts. This method does not normalise the expression (full CNF is not computed).

Returns:

The conjucts of this expression if it is a conjunction (object intersection of), or otherwise a singleton set containing this expression. Note that nested conjunctions will be flattened, for example, calling this method on (A and B) and C will return the set {A, B, C}

containsConjunct

boolean containsConjunct(OWLClassExpression ce)

Determines if this class expression contains a particular conjunct. This method does not do any normalisation such as applying DeMorgans rules.

Parameters:

ce - The conjunct to test for

Returns:

true if this class expression is equal to ce or if this class expression is an ObjectIntersectionOf (possibly nested withing another ObjectIntersectionOf) that contains ce, otherwise false.

disjunctSet

default java.util.stream.Stream<OWLClassExpression> disjunctSet()

Interprets this expression as a disjunction and returns the disjuncts. This method does not normalise the expression (full DNF is not computed).

Returns:

The disjuncts of this expression if it is a disjunction (object union of), or otherwise a singleton set containing this expression. Note that nested disjunctions will be flattened, for example, calling this method on (A or B) or C will return the set {A, B, C}

asDisjunctSet

Set<OWLClassExpression> asDisjunctSet()

Interprets this expression as a disjunction and returns the disjuncts. This method does not normalise the expression (full DNF is not computed).

Returns:

The disjuncts of this expression if it is a disjunction (object union of), or otherwise a singleton set containing this expression. Note that nested disjunctions will be flattened, for example, calling this method on (A or B) or C will return the set {A, B, C}

accept

void accept(OWLClassExpressionVisitor visitor)

Accepts a visit from an OWLExpressionVisitor.

Parameters:

visitor - The visitor that wants to visit

accept

<O> O accept(OWLClassExpressionVisitorEx<O> visitor)

Type Parameters:

O - visitor return type

Parameters:

visitor - visitor

Returns:

visitor return value