/// <summary> /// SymmetricPropertyEntailment implements data entailments based on 'owl:SymmetricProperty' axiom: /// ((F1 P F2) AND (P TYPE SYMMETRICPROPERTY)) => (F2 P F1) /// </summary> internal static RDFOntologyReasonerReport SymmetricPropertyEntailmentExec(RDFOntology ontology) { var report = new RDFOntologyReasonerReport(); //Calculate the set of available properties on which to perform the reasoning (exclude BASE properties and not-symmetric properties) var availableprops = ontology.Model.PropertyModel.Where(prop => !RDFOntologyChecker.CheckReservedProperty(prop) && prop.IsSymmetricProperty()).ToList(); foreach (var p in availableprops) { //Filter the assertions using the current property (F1 P F2) var pAsns = ontology.Data.Relations.Assertions.SelectEntriesByPredicate(p); //Iterate those assertions foreach (var pAsn in pAsns) { //Taxonomy-check for securing inference consistency if (pAsn.TaxonomyObject.IsFact()) { //Create the inference as a taxonomy entry var sem_inf = new RDFOntologyTaxonomyEntry(pAsn.TaxonomyObject, p, pAsn.TaxonomySubject).SetInference(RDFSemanticsEnums.RDFOntologyInferenceType.Reasoner); //Add the inference to the ontology and to the report if (ontology.Data.Relations.Assertions.AddEntry(sem_inf)) { report.AddEvidence(new RDFOntologyReasonerEvidence(RDFSemanticsEnums.RDFOntologyReasonerEvidenceCategory.Data, "SymmetricPropertyEntailment", sem_inf)); } } } } return(report); }
/// <summary> /// EquivalentPropertyTransitivity implements structural entailments based on 'owl:EquivalentProperty' taxonomy: /// ((P1 EQUIVALENTPROPERTY P2) AND (P2 EQUIVALENTPROPERTY P3)) => (P1 EQUIVALENTPROPERTY P3) /// </summary> internal static RDFOntologyReasonerReport EquivalentPropertyTransitivityExec(RDFOntology ontology) { var report = new RDFOntologyReasonerReport(); var equivProperty = RDFVocabulary.OWL.EQUIVALENT_PROPERTY.ToRDFOntologyObjectProperty(); //Calculate the set of available properties on which to perform the reasoning (exclude BASE properties and annotation properties) var availableprops = ontology.Model.PropertyModel.Where(prop => !RDFOntologyChecker.CheckReservedProperty(prop) && !prop.IsAnnotationProperty()).ToList(); foreach (var p in availableprops) { //Enlist the equivalent properties of the current property var equivprops = ontology.Model.PropertyModel.GetEquivalentPropertiesOf(p); foreach (var ep in equivprops) { //Create the inference as a taxonomy entry var sem_infA = new RDFOntologyTaxonomyEntry(p, equivProperty, ep).SetInference(RDFSemanticsEnums.RDFOntologyInferenceType.Reasoner); var sem_infB = new RDFOntologyTaxonomyEntry(ep, equivProperty, p).SetInference(RDFSemanticsEnums.RDFOntologyInferenceType.Reasoner); //Add the inference to the ontology and to the report if (ontology.Model.PropertyModel.Relations.EquivalentProperty.AddEntry(sem_infA)) { report.AddEvidence(new RDFOntologyReasonerEvidence(RDFSemanticsEnums.RDFOntologyReasonerEvidenceCategory.PropertyModel, "EquivalentPropertyTransitivity", sem_infA)); } if (ontology.Model.PropertyModel.Relations.EquivalentProperty.AddEntry(sem_infB)) { report.AddEvidence(new RDFOntologyReasonerEvidence(RDFSemanticsEnums.RDFOntologyReasonerEvidenceCategory.PropertyModel, "EquivalentPropertyTransitivity", sem_infB)); } } } return(report); }
/// <summary> /// "DomainEntailment (rdfs2) implements structural entailments based on 'rdfs:domain' taxonomy:" /// "((F1 P F2) AND (P RDFS:DOMAIN C)) => (F1 RDF:TYPE C)" /// </summary> internal static RDFOntologyReasonerReport DomainEntailmentExec(RDFOntology ontology) { var report = new RDFOntologyReasonerReport(); var type = RDFVocabulary.RDF.TYPE.ToRDFOntologyObjectProperty(); //Calculate the set of available properties on which to perform the reasoning (exclude BASE properties and annotation properties) var availableprops = ontology.Model.PropertyModel.Where(prop => !RDFOntologyChecker.CheckReservedProperty(prop) && !prop.IsAnnotationProperty()).ToList(); foreach (var p in availableprops) { if (p.Domain != null) { //Filter the assertions using the current property (F1 P1 F2) var pAsns = ontology.Data.Relations.Assertions.SelectEntriesByPredicate(p); //Iterate the related assertions foreach (var pAsn in pAsns) { //Create the inference as a taxonomy entry var sem_inf = new RDFOntologyTaxonomyEntry(pAsn.TaxonomySubject, type, p.Domain).SetInference(RDFSemanticsEnums.RDFOntologyInferenceType.Reasoner); //Add the inference to the ontology and to the report if (ontology.Data.Relations.ClassType.AddEntry(sem_inf)) { report.AddEvidence(new RDFOntologyReasonerEvidence(RDFSemanticsEnums.RDFOntologyReasonerEvidenceCategory.Data, "DomainEntailment", sem_inf)); } } } } return(report); }
/// <summary> /// ClassTypeEntailment (rdfs9) implements structural entailments based on 'rdf:type' taxonomy: /// ((F TYPE C1) AND (C1 SUBCLASSOF C2)) => (F TYPE C2) /// ((F TYPE C1) AND (C1 EQUIVALENTCLASS C2)) => (F TYPE C2) /// </summary> internal static RDFOntologyReasonerReport ClassTypeEntailmentExec(RDFOntology ontology) { var report = new RDFOntologyReasonerReport(); var type = RDFVocabulary.RDF.TYPE.ToRDFOntologyObjectProperty(); //Calculate the set of available classes on which to perform the reasoning (exclude BASE classes and literal-compatible classes) var availableclasses = ontology.Model.ClassModel.Where(cls => !RDFOntologyChecker.CheckReservedClass(cls) && !ontology.Model.ClassModel.CheckIsLiteralCompatible(cls)); foreach (var c in availableclasses) { //Enlist the members of the current class var clsMembers = ontology.GetMembersOfNonLiteralCompatibleClass(c); foreach (var f in clsMembers) { //Create the inference as a taxonomy entry var sem_inf = new RDFOntologyTaxonomyEntry(f, type, c).SetInference(RDFSemanticsEnums.RDFOntologyInferenceType.Reasoner); //Add the inference to the ontology and to the report if (ontology.Data.Relations.ClassType.AddEntry(sem_inf)) { report.AddEvidence(new RDFOntologyReasonerEvidence(RDFSemanticsEnums.RDFOntologyReasonerEvidenceCategory.Data, "ClassTypeEntailment", sem_inf)); } } } return(report); }
/// <summary> /// SubPropertyTransitivity (rdfs5) implements structural entailments based on 'rdfs:subPropertyOf' taxonomy: /// ((P1 SUBPROPERTYOF P2) AND (P2 SUBPROPERTYOF P3)) => (P1 SUBPROPERTYOF P3) /// ((P1 SUBPROPERTYOF P2) AND (P2 EQUIVALENTPROPERTY P3)) => (P1 SUBPROPERTYOF P3) /// ((P1 EQUIVALENTPROPERTY P2) AND (P2 SUBPROPERTYOF P3)) => (P1 SUBPROPERTYOF P3) /// </summary> internal static RDFOntologyReasonerReport SubPropertyTransitivityExec(RDFOntology ontology) { var report = new RDFOntologyReasonerReport(); var subPropertyOf = RDFVocabulary.RDFS.SUB_PROPERTY_OF.ToRDFOntologyObjectProperty(); //Calculate the set of available properties on which to perform the reasoning (exclude BASE properties and annotation properties) var availableprops = ontology.Model.PropertyModel.Where(prop => !RDFOntologyChecker.CheckReservedProperty(prop) && !prop.IsAnnotationProperty()).ToList(); foreach (var p in availableprops) { //Enlist the superproperties of the current property var superprops = ontology.Model.PropertyModel.GetSuperPropertiesOf(p); foreach (var sp in superprops) { //Create the inference as a taxonomy entry var sem_inf = new RDFOntologyTaxonomyEntry(p, subPropertyOf, sp).SetInference(RDFSemanticsEnums.RDFOntologyInferenceType.Reasoner); //Add the inference to the ontology and to the report if (ontology.Model.PropertyModel.Relations.SubPropertyOf.AddEntry(sem_inf)) { report.AddEvidence(new RDFOntologyReasonerEvidence(RDFSemanticsEnums.RDFOntologyReasonerEvidenceCategory.PropertyModel, "SubPropertyTransitivity", sem_inf)); } } } return(report); }
/// <summary> /// TransitivePropertyEntailment implements data entailments based on 'owl:TransitiveProperty' axiom: /// ((F1 P F2) AND (F2 P F3) AND (P TYPE TRANSITIVEPROPERTY)) => (F1 P F3) /// </summary> internal static RDFOntologyReasonerReport TransitivePropertyEntailmentExec(RDFOntology ontology) { var report = new RDFOntologyReasonerReport(); var transPropCache = new Dictionary <Int64, RDFOntologyData>(); //Calculate the set of available properties on which to perform the reasoning (exclude BASE properties and not-transitive properties) var availableprops = ontology.Model.PropertyModel.Where(prop => !RDFOntologyChecker.CheckReservedProperty(prop) && prop.IsTransitiveProperty()).ToList(); foreach (var p in availableprops) { //Filter the assertions using the current property (F1 P F2) var pAsns = ontology.Data.Relations.Assertions.SelectEntriesByPredicate(p); //Iterate those assertions foreach (var pAsn in pAsns) { //Taxonomy-check for securing inference consistency if (pAsn.TaxonomyObject.IsFact()) { if (!transPropCache.ContainsKey(pAsn.TaxonomySubject.PatternMemberID)) { transPropCache.Add(pAsn.TaxonomySubject.PatternMemberID, ontology.Data.GetTransitiveAssertionsOf((RDFOntologyFact)pAsn.TaxonomySubject, (RDFOntologyObjectProperty)p)); } foreach (var te in transPropCache[pAsn.TaxonomySubject.PatternMemberID]) { //Create the inference as a taxonomy entry var sem_inf = new RDFOntologyTaxonomyEntry(pAsn.TaxonomySubject, p, te).SetInference(RDFSemanticsEnums.RDFOntologyInferenceType.Reasoner); //Add the inference to the ontology and to the report if (ontology.Data.Relations.Assertions.AddEntry(sem_inf)) { report.AddEvidence(new RDFOntologyReasonerEvidence(RDFSemanticsEnums.RDFOntologyReasonerEvidenceCategory.Data, "TransitivePropertyEntailment", sem_inf)); } } } } transPropCache.Clear(); } return(report); }
/// <summary> /// InverseOfEntailment implements data entailments based on 'owl:inverseOf' taxonomy: /// ((F1 P1 F2) AND (P1 INVERSEOF P2)) => (F2 P2 F1) /// </summary> internal static RDFOntologyReasonerReport InverseOfEntailmentExec(RDFOntology ontology) { var report = new RDFOntologyReasonerReport(); //Calculate the set of available properties on which to perform the reasoning (exclude BASE properties and annotation/datatype properties) var availableprops = ontology.Model.PropertyModel.Where(prop => !RDFOntologyChecker.CheckReservedProperty(prop) && prop.IsObjectProperty()).ToList(); foreach (var p1 in availableprops) { //Filter the assertions using the current property (F1 P1 F2) var p1Asns = ontology.Data.Relations.Assertions.SelectEntriesByPredicate(p1); //Enlist the inverse properties of the current property var inverseprops = ontology.Model.PropertyModel.GetInversePropertiesOf((RDFOntologyObjectProperty)p1); foreach (var p2 in inverseprops) { //Iterate the compatible assertions foreach (var p1Asn in p1Asns) { //Taxonomy-check for securing inference consistency if (p2.IsObjectProperty() && p1Asn.TaxonomyObject.IsFact()) { //Create the inference as a taxonomy entry var sem_inf = new RDFOntologyTaxonomyEntry(p1Asn.TaxonomyObject, p2, p1Asn.TaxonomySubject).SetInference(RDFSemanticsEnums.RDFOntologyInferenceType.Reasoner); //Add the inference to the ontology and to the report if (ontology.Data.Relations.Assertions.AddEntry(sem_inf)) { report.AddEvidence(new RDFOntologyReasonerEvidence(RDFSemanticsEnums.RDFOntologyReasonerEvidenceCategory.Data, "InverseOfEntailment", sem_inf)); } } } } } return(report); }