org.semanticweb.owlapi.model

Interface OWLEquivalentClassesAxiom

All Superinterfaces:

Comparable<OWLObject>, HasAnnotationPropertiesInSignature, HasAnnotations, HasAnonymousIndividuals, HasClassesInSignature, HasContainsEntityInSignature, HasDataPropertiesInSignature, HasDatatypesInSignature, HasIndividualsInSignature, HasObjectPropertiesInSignature, HasSignature, IsAnonymous, OWLAxiom, OWLClassAxiom, OWLLogicalAxiom, OWLNaryAxiom<OWLClassExpression>, OWLNaryClassAxiom, OWLObject, OWLSubClassOfAxiomSetShortCut, Serializable

All Known Implementing Classes:

OWLEquivalentClassesAxiomImpl

public interface OWLEquivalentClassesAxiom
extends OWLNaryClassAxiom

Represents an EquivalentClasses axiom in the OWL 2 Specification.

Since:

2.0.0

Author:

Matthew Horridge, The University Of Manchester, Bio-Health Informatics Group

Method Summary

Modifier and Type	Method and Description
Set<OWLEquivalentClassesAxiom>	asPairwiseAxioms() Gets this axiom as a set of pairwise axioms; if the axiom contains only two operands, the axiom itself is returned unchanged, including its annotations.
boolean	containsNamedEquivalentClass() Determines if this equivalent classes axiom contains at least one named class (excluding owl:Thing or owl:Nothing).
boolean	containsOWLNothing() Determines if this class axiom makes a class expression equivalent to nothing.
boolean	containsOWLThing() Determines if this class axiom makes a class expression equivalent to thing.
OWLEquivalentClassesAxiom	getAxiomWithoutAnnotations() Gets an axiom that is structurally equivalent to this axiom without annotations.
Set<OWLClass>	getNamedClasses() Gets the named classes (excluding owl:Thing and owl:Nothing) that are in this equivalent classes axiom.
Set<OWLEquivalentClassesAxiom>	splitToAnnotatedPairs() Splits this axiom to pairs, including annotations.

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

contains, getClassExpressions, getClassExpressionsAsList, getClassExpressionsMinus

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

accept, accept, equalsIgnoreAnnotations, getAnnotatedAxiom, getAnnotations, getAnnotations, getAxiomType, getNNF, isAnnotated, isAnnotationAxiom, isLogicalAxiom, isOfType, isOfType

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

accept, accept, getNestedClassExpressions, isBottomEntity, isIndividual, isIRI, isTopEntity, toString

Methods inherited from interface java.lang.Comparable

compareTo

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

getSignature

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

containsEntityInSignature

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

getAnonymousIndividuals

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

getClassesInSignature

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

getObjectPropertiesInSignature

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

getDataPropertiesInSignature

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

getIndividualsInSignature

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

getDatatypesInSignature

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

getAnnotationPropertiesInSignature

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

isAnonymous, isNamed

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

walkPairwise

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

asOWLSubClassOfAxioms

Method Detail

containsNamedEquivalentClass

boolean containsNamedEquivalentClass()

Determines if this equivalent classes axiom contains at least one named class (excluding owl:Thing or owl:Nothing).

Returns:

true if the axiom contains at least one named class otherwise false. Note that this method will return false if the only named classes are owl:Thing or owl:Nothing.

getNamedClasses

@Nonnull
Set<OWLClass> getNamedClasses()

Gets the named classes (excluding owl:Thing and owl:Nothing) that are in this equivalent classes axiom.

Returns:

A set of classes that represents the named classes that are specified to be equivalent to some other class (expression), excluding the built in classes owl:Thing and owl:Nothing

containsOWLNothing

boolean containsOWLNothing()

Determines if this class axiom makes a class expression equivalent to nothing.

Returns:

true if this axiom contains owl:Nothing as an equivalent class.

containsOWLThing

boolean containsOWLThing()

Determines if this class axiom makes a class expression equivalent to thing.

Returns:

true if this axioms contains owl:Thing as an equivalent class.

asPairwiseAxioms

@Nonnull
Set<OWLEquivalentClassesAxiom> asPairwiseAxioms()

Description copied from interface: OWLNaryAxiom

Gets this axiom as a set of pairwise axioms; if the axiom contains only two operands, the axiom itself is returned unchanged, including its annotations. Note that, aside from this exception, annotations on this axiom will not be copied to each axiom returned in the set of pairwise axioms.
Note: This will contain all pairs, i.e., for the set "a, b, c" the pairs "a, b", "a, c", "b, c" will be returned. For some applications, only "a, b", "b, c" are required.

Specified by:

asPairwiseAxioms in interface OWLNaryAxiom<OWLClassExpression>

Returns:

This axiom as a set of pairwise axioms.

splitToAnnotatedPairs

@Nonnull
Set<OWLEquivalentClassesAxiom> splitToAnnotatedPairs()

Description copied from interface: OWLNaryAxiom

Splits this axiom to pairs, including annotations. This method implements the process described at http://www.w3.org/TR/owl2-mapping-to-rdf/# Axioms_that_are_Translated_to_Multiple_Triples which is used, for example, in serializing EquivalentProperty axioms with three operands. Note that annotations on this axiom will be copied to each axiom returned in the set of pairwise axioms. Note: This will contain only the "An, An+1" pairs, i.e., for the set "a, b, c" the pairs "a, b" and "b, c" will be returned, but not "a, c".

Specified by:

splitToAnnotatedPairs in interface OWLNaryAxiom<OWLClassExpression>

Returns:

This axiom as a set of pairwise axioms, annotations included.

getAxiomWithoutAnnotations

@Nonnull
OWLEquivalentClassesAxiom getAxiomWithoutAnnotations()

Description copied from interface: OWLAxiom

Gets an axiom that is structurally equivalent to this axiom without annotations. This essentially returns a version of this axiom stripped of any annotations

Specified by:

getAxiomWithoutAnnotations in interface OWLAxiom

Returns:

the axiom deprived of annotations