/// <summary>
        /// Updates the previously detected restrictions to their specific types
        /// </summary>
        internal static void RefineRestrictions(RDFGraph ontGraph, RDFOntology ontology) {
            var changeLog      = new Dictionary<Int64, RDFOntologyClass>();
            foreach (var c in ontology.Model.ClassModel) {
                if (c.IsRestrictionClass()) {

                    #region CardinalityRestriction
                    Int32 minC = 0;
                    var crMin  = ontGraph.SelectTriplesBySubject((RDFResource)c.Value)
                                         .SelectTriplesByPredicate(RDFVocabulary.OWL.MIN_CARDINALITY)
                                         .FirstOrDefault();
                    if (crMin != null && crMin.TripleFlavor == RDFModelEnums.RDFTripleFlavors.SPL) {
                        if (crMin.Object is RDFPlainLiteral) {
                            if (Regex.IsMatch(crMin.Object.ToString(), @"^[0-9]+$")) {
                                minC = Int32.Parse(crMin.Object.ToString());
                            }
                        }
                        else {
                            if (((RDFTypedLiteral)crMin.Object).Datatype.Category == RDFModelEnums.RDFDatatypeCategory.Numeric) {
                                if (Regex.IsMatch(((RDFTypedLiteral)crMin.Object).Value, @"^[0-9]+$")) {
                                    minC = Int32.Parse(((RDFTypedLiteral)crMin.Object).Value);
                                }
                            }
                        }
                    }

                    Int32 maxC = 0;
                    var crMax  = ontGraph.SelectTriplesBySubject((RDFResource)c.Value)
                                         .SelectTriplesByPredicate(RDFVocabulary.OWL.MAX_CARDINALITY)
                                         .FirstOrDefault();
                    if (crMax != null && crMax.TripleFlavor == RDFModelEnums.RDFTripleFlavors.SPL) {
                        if (crMax.Object is RDFPlainLiteral) {
                            if (Regex.IsMatch(crMax.Object.ToString(), @"^[0-9]+$")) {
                                maxC = Int32.Parse(crMax.Object.ToString());
                            }
                        }
                        else {
                            if (((RDFTypedLiteral)crMax.Object).Datatype.Category == RDFModelEnums.RDFDatatypeCategory.Numeric) {
                                if (Regex.IsMatch(((RDFTypedLiteral)crMax.Object).Value, @"^[0-9]+$")) {
                                    maxC = Int32.Parse(((RDFTypedLiteral)crMax.Object).Value);
                                }
                            }
                        }
                    }

                    if ((minC > 0 || maxC > 0) && !changeLog.ContainsKey(c.PatternMemberID)) {
                        var restr                = new RDFOntologyCardinalityRestriction(((RDFOntologyRestriction)c).OnProperty, minC, maxC);
                        restr.Value              = c.Value;
                        restr.PatternMemberID    = c.PatternMemberID;
                        restr.DirectSubClasses   = c.DirectSubClasses;
                        restr.DirectSuperClasses = c.DirectSuperClasses;
                        restr.DisjointClasses    = c.DisjointClasses;
                        restr.EquivalentClasses  = c.EquivalentClasses;
                        changeLog.Add(restr.PatternMemberID, restr);
                    }
                    #endregion

                    #region HasValueRestriction
                    var hvRes      = ontGraph.SelectTriplesBySubject((RDFResource)c.Value)
                                             .SelectTriplesByPredicate(RDFVocabulary.OWL.HAS_VALUE)
                                             .FirstOrDefault();
                    if (hvRes     != null) {
                        var hvFct  = ontology.Data.SelectFact(hvRes.Object.ToString());
                        if (hvFct != null) {
                            if (!changeLog.ContainsKey(c.PatternMemberID)) {
                                var restr                = new RDFOntologyHasValueRestriction(((RDFOntologyRestriction)c).OnProperty, hvFct);
                                restr.Value              = c.Value;
                                restr.PatternMemberID    = c.PatternMemberID;
                                restr.DirectSubClasses   = c.DirectSubClasses;
                                restr.DirectSuperClasses = c.DirectSuperClasses;
                                restr.DisjointClasses    = c.DisjointClasses;
                                restr.EquivalentClasses  = c.EquivalentClasses;
                                changeLog.Add(restr.PatternMemberID, restr);
                            }
                        }
                        else {
                            throw new RDFSemanticsException("Cannot create hasValue restriction '" + c.Value + "' from graph, because its required fact '" + hvRes.Object + "' has not been found in the ontology data.");
                        }
                    }
                    #endregion

                    #region ValuesFromRestriction
                    var avfRes      = ontGraph.SelectTriplesBySubject((RDFResource)c.Value)
                                              .SelectTriplesByPredicate(RDFVocabulary.OWL.ALL_VALUES_FROM)
                                              .FirstOrDefault();
                    if (avfRes     != null) {
                        var avfCls  = ontology.Model.ClassModel.SelectClass(avfRes.Object.ToString());
                        if (avfCls != null) {
                            if (!changeLog.ContainsKey(c.PatternMemberID)) {
                                var restr                = new RDFOntologyValuesFromRestriction(((RDFOntologyRestriction)c).OnProperty, RDFSemanticsEnums.RDFOntologyValuesFromRestrictionCategory.AllValuesFrom, avfCls);
                                restr.Value              = c.Value;
                                restr.PatternMemberID    = c.PatternMemberID;
                                restr.DirectSubClasses   = c.DirectSubClasses;
                                restr.DirectSuperClasses = c.DirectSuperClasses;
                                restr.DisjointClasses    = c.DisjointClasses;
                                restr.EquivalentClasses  = c.EquivalentClasses;
                                changeLog.Add(restr.PatternMemberID, restr);
                            }
                        }
                        else {
                            throw new RDFSemanticsException("Cannot create allValuesFrom restriction '" + c.Value + "' from graph, because its fromClass '" + avfRes.Object + "' has not been found in the ontology model.");
                        }
                    }

                    var svfRes      = ontGraph.SelectTriplesBySubject((RDFResource)c.Value)
                                              .SelectTriplesByPredicate(RDFVocabulary.OWL.SOME_VALUES_FROM)
                                              .FirstOrDefault();
                    if (svfRes     != null) {
                        var svfCls  = ontology.Model.ClassModel.SelectClass(svfRes.Object.ToString());
                        if (svfCls != null) {
                            if (!changeLog.ContainsKey(c.PatternMemberID)) {
                                var restr                = new RDFOntologyValuesFromRestriction(((RDFOntologyRestriction)c).OnProperty, RDFSemanticsEnums.RDFOntologyValuesFromRestrictionCategory.SomeValuesFrom, svfCls);
                                restr.Value              = c.Value;
                                restr.PatternMemberID    = c.PatternMemberID;
                                restr.DirectSubClasses   = c.DirectSubClasses;
                                restr.DirectSuperClasses = c.DirectSuperClasses;
                                restr.DisjointClasses    = c.DisjointClasses;
                                restr.EquivalentClasses  = c.EquivalentClasses;
                                changeLog.Add(restr.PatternMemberID, restr);
                            }
                        }
                        else {
                            throw new RDFSemanticsException("Cannot create someValuesFrom restriction '" + c.Value + "' from graph, because its fromClass '" + svfRes.Object + "' has not been found in the ontology model.");
                        }
                    }
                    #endregion

                }
            }
            foreach (var cl in changeLog) {
                ontology.Model.ClassModel.Classes[cl.Key] = cl.Value;
            }
        }
Ejemplo n.º 2
0
        /// <summary>
        /// Gets an ontology representation of the given graph
        /// </summary>
        internal static RDFOntology FromRDFGraph(RDFGraph ontGraph) {
            RDFOntology ontology  = null;
            if (ontGraph         != null) {
                ontology          = new RDFOntology(new RDFResource(ontGraph.Context));

                #region Prefetch
                var versionInfo   = ontGraph.SelectTriplesByPredicate(RDFVocabulary.OWL.VERSION_INFO);
                var comment       = ontGraph.SelectTriplesByPredicate(RDFVocabulary.RDFS.COMMENT);
                var label         = ontGraph.SelectTriplesByPredicate(RDFVocabulary.RDFS.LABEL);
                var seeAlso       = ontGraph.SelectTriplesByPredicate(RDFVocabulary.RDFS.SEE_ALSO);
                var isDefinedBy   = ontGraph.SelectTriplesByPredicate(RDFVocabulary.RDFS.IS_DEFINED_BY);
                var imports       = ontGraph.SelectTriplesByPredicate(RDFVocabulary.OWL.IMPORTS);
                var bcwcompWith   = ontGraph.SelectTriplesByPredicate(RDFVocabulary.OWL.BACKWARD_COMPATIBLE_WITH);
                var incompWith    = ontGraph.SelectTriplesByPredicate(RDFVocabulary.OWL.INCOMPATIBLE_WITH);
                var priorVersion  = ontGraph.SelectTriplesByPredicate(RDFVocabulary.OWL.PRIOR_VERSION);

                var rdfType       = ontGraph.SelectTriplesByPredicate(RDFVocabulary.RDF.TYPE);
                var subclassOf    = ontGraph.SelectTriplesByPredicate(RDFVocabulary.RDFS.SUB_CLASS_OF);
                var subpropOf     = ontGraph.SelectTriplesByPredicate(RDFVocabulary.RDFS.SUB_PROPERTY_OF);
                var equivclassOf  = ontGraph.SelectTriplesByPredicate(RDFVocabulary.OWL.EQUIVALENT_CLASS);
                var equivpropOf   = ontGraph.SelectTriplesByPredicate(RDFVocabulary.OWL.EQUIVALENT_PROPERTY);
                var disjclassWith = ontGraph.SelectTriplesByPredicate(RDFVocabulary.OWL.DISJOINT_WITH);
                var domain        = ontGraph.SelectTriplesByPredicate(RDFVocabulary.RDFS.DOMAIN);
                var range         = ontGraph.SelectTriplesByPredicate(RDFVocabulary.RDFS.RANGE);
                var onProperty    = ontGraph.SelectTriplesByPredicate(RDFVocabulary.OWL.ON_PROPERTY);
                var oneOf         = ontGraph.SelectTriplesByPredicate(RDFVocabulary.OWL.ONE_OF);
                var unionOf       = ontGraph.SelectTriplesByPredicate(RDFVocabulary.OWL.UNION_OF);
                var intersectionOf= ontGraph.SelectTriplesByPredicate(RDFVocabulary.OWL.INTERSECTION_OF);
                var complementOf  = ontGraph.SelectTriplesByPredicate(RDFVocabulary.OWL.COMPLEMENT_OF);
                var inverseOf     = ontGraph.SelectTriplesByPredicate(RDFVocabulary.OWL.INVERSE_OF);
                var allvaluesFrom = ontGraph.SelectTriplesByPredicate(RDFVocabulary.OWL.ALL_VALUES_FROM);
                var somevaluesFrom= ontGraph.SelectTriplesByPredicate(RDFVocabulary.OWL.SOME_VALUES_FROM);
                var hasvalue      = ontGraph.SelectTriplesByPredicate(RDFVocabulary.OWL.HAS_VALUE);
                var cardinality   = ontGraph.SelectTriplesByPredicate(RDFVocabulary.OWL.CARDINALITY);
                var mincardinality= ontGraph.SelectTriplesByPredicate(RDFVocabulary.OWL.MIN_CARDINALITY);
                var maxcardinality= ontGraph.SelectTriplesByPredicate(RDFVocabulary.OWL.MAX_CARDINALITY);
                var sameAs        = ontGraph.SelectTriplesByPredicate(RDFVocabulary.OWL.SAME_AS);
                var differentFrom = ontGraph.SelectTriplesByPredicate(RDFVocabulary.OWL.DIFFERENT_FROM);
                #endregion

                #region Load

                #region Ontology
                if (!rdfType.ContainsTriple(new RDFTriple((RDFResource)ontology.Value, RDFVocabulary.RDF.TYPE, RDFVocabulary.OWL.ONTOLOGY))) {
                     var ont     = rdfType.SelectTriplesByObject(RDFVocabulary.OWL.ONTOLOGY).FirstOrDefault();
                     if (ont    != null) {
                         ontology.Value           = ont.Subject;
                         ontology.PatternMemberID = ontology.Value.PatternMemberID;
                     }
                }
                #endregion

                #region OntologyModel

                #region PropertyModel

                #region AnnotationProperty
                foreach (var ap in rdfType.SelectTriplesByObject(RDFVocabulary.OWL.ANNOTATION_PROPERTY)) {
                    ontology.Model.PropertyModel.AddProperty(new RDFOntologyAnnotationProperty((RDFResource)ap.Subject));
                }
                #endregion

                #region DatatypeProperty
                foreach (var dp in rdfType.SelectTriplesByObject(RDFVocabulary.OWL.DATATYPE_PROPERTY)) {
                    var dtp   = new RDFOntologyDatatypeProperty((RDFResource)dp.Subject);
                    ontology.Model.PropertyModel.AddProperty(dtp);

                    #region DeprecatedProperty
                    if (ontGraph.ContainsTriple(new RDFTriple((RDFResource)dtp.Value, RDFVocabulary.RDF.TYPE, RDFVocabulary.OWL.DEPRECATED_PROPERTY))) {
                        dtp.SetDeprecated(true);
                    }
                    #endregion

                    #region FunctionalProperty
                    if (ontGraph.ContainsTriple(new RDFTriple((RDFResource)dtp.Value, RDFVocabulary.RDF.TYPE, RDFVocabulary.OWL.FUNCTIONAL_PROPERTY))) {
                        dtp.SetFunctional(true);
                    }
                    #endregion

                }
                #endregion

                #region ObjectProperty
                foreach (var op in rdfType.SelectTriplesByObject(RDFVocabulary.OWL.OBJECT_PROPERTY)) {
                    var obp  = new RDFOntologyObjectProperty((RDFResource)op.Subject);
                    ontology.Model.PropertyModel.AddProperty(obp);

                    #region DeprecatedProperty
                    if (ontGraph.ContainsTriple(new RDFTriple((RDFResource)obp.Value, RDFVocabulary.RDF.TYPE, RDFVocabulary.OWL.DEPRECATED_PROPERTY))) {
                        obp.SetDeprecated(true);
                    }
                    #endregion

                    #region FunctionalProperty
                    if (ontGraph.ContainsTriple(new RDFTriple((RDFResource)obp.Value, RDFVocabulary.RDF.TYPE, RDFVocabulary.OWL.FUNCTIONAL_PROPERTY))) {
                        obp.SetFunctional(true);
                    }
                    #endregion

                    #region SymmetricProperty
                    if (ontGraph.ContainsTriple(new RDFTriple((RDFResource)obp.Value, RDFVocabulary.RDF.TYPE, RDFVocabulary.OWL.SYMMETRIC_PROPERTY))) {
                        obp.SetSymmetric(true);
                    }
                    #endregion

                    #region TransitiveProperty
                    if (ontGraph.ContainsTriple(new RDFTriple((RDFResource)obp.Value, RDFVocabulary.RDF.TYPE, RDFVocabulary.OWL.TRANSITIVE_PROPERTY))) {
                        obp.SetTransitive(true);
                    }
                    #endregion

                    #region InverseFunctionalProperty
                    if (ontGraph.ContainsTriple(new RDFTriple((RDFResource)obp.Value, RDFVocabulary.RDF.TYPE, RDFVocabulary.OWL.INVERSE_FUNCTIONAL_PROPERTY))) {
                        obp.SetInverseFunctional(true);
                    }
                    #endregion

                }

                #region SymmetricProperty
                foreach (var sp in rdfType.SelectTriplesByObject(RDFVocabulary.OWL.SYMMETRIC_PROPERTY)) {
                    var syp  = ontology.Model.PropertyModel.SelectProperty(sp.Subject.ToString());
                    if (syp == null) {
                        syp  = new RDFOntologyObjectProperty((RDFResource)sp.Subject);
                        ontology.Model.PropertyModel.AddProperty(syp);

                        #region DeprecatedProperty
                        if (ontGraph.ContainsTriple(new RDFTriple((RDFResource)syp.Value, RDFVocabulary.RDF.TYPE, RDFVocabulary.OWL.DEPRECATED_PROPERTY))) {
                            syp.SetDeprecated(true);
                        }
                        #endregion

                        #region FunctionalProperty
                        if (ontGraph.ContainsTriple(new RDFTriple((RDFResource)syp.Value, RDFVocabulary.RDF.TYPE, RDFVocabulary.OWL.FUNCTIONAL_PROPERTY))) {
                            syp.SetFunctional(true);
                        }
                        #endregion

                    }
                    ((RDFOntologyObjectProperty)syp).SetSymmetric(true);
                }
                #endregion

                #region TransitiveProperty
                foreach (var tp in rdfType.SelectTriplesByObject(RDFVocabulary.OWL.TRANSITIVE_PROPERTY)) {
                    var trp  = ontology.Model.PropertyModel.SelectProperty(tp.Subject.ToString());
                    if (trp == null) {
                        trp  = new RDFOntologyObjectProperty((RDFResource)tp.Subject);
                        ontology.Model.PropertyModel.AddProperty(trp);

                        #region DeprecatedProperty
                        if (ontGraph.ContainsTriple(new RDFTriple((RDFResource)trp.Value, RDFVocabulary.RDF.TYPE, RDFVocabulary.OWL.DEPRECATED_PROPERTY))) {
                            trp.SetDeprecated(true);
                        }
                        #endregion

                        #region FunctionalProperty
                        if (ontGraph.ContainsTriple(new RDFTriple((RDFResource)trp.Value, RDFVocabulary.RDF.TYPE, RDFVocabulary.OWL.FUNCTIONAL_PROPERTY))) {
                            trp.SetFunctional(true);
                        }
                        #endregion

                    }
                    ((RDFOntologyObjectProperty)trp).SetTransitive(true);
                }
                #endregion

                #region InverseFunctionalProperty
                foreach (var ip in rdfType.SelectTriplesByObject(RDFVocabulary.OWL.INVERSE_FUNCTIONAL_PROPERTY)) {
                    var ifp  = ontology.Model.PropertyModel.SelectProperty(ip.Subject.ToString());
                    if (ifp == null) {
                        ifp  = new RDFOntologyObjectProperty((RDFResource)ip.Subject);
                        ontology.Model.PropertyModel.AddProperty(ifp);

                        #region DeprecatedProperty
                        if (ontGraph.ContainsTriple(new RDFTriple((RDFResource)ifp.Value, RDFVocabulary.RDF.TYPE, RDFVocabulary.OWL.DEPRECATED_PROPERTY))) {
                            ifp.SetDeprecated(true);
                        }
                        #endregion

                        #region FunctionalProperty
                        if (ontGraph.ContainsTriple(new RDFTriple((RDFResource)ifp.Value, RDFVocabulary.RDF.TYPE, RDFVocabulary.OWL.FUNCTIONAL_PROPERTY))) {
                            ifp.SetFunctional(true);
                        }
                        #endregion

                    }
                    ((RDFOntologyObjectProperty)ifp).SetInverseFunctional(true);
                }
                #endregion
                #endregion

                #endregion

                #region ClassModel

                #region Class
                foreach (var c   in rdfType.SelectTriplesByObject(RDFVocabulary.OWL.CLASS)) {
                    var ontClass  = new RDFOntologyClass((RDFResource)c.Subject);
                    ontology.Model.ClassModel.AddClass(ontClass);
                    if   (ontGraph.ContainsTriple(new RDFTriple((RDFResource)ontClass.Value, RDFVocabulary.RDF.TYPE, RDFVocabulary.OWL.DEPRECATED_CLASS))) {
                          ontClass.SetDeprecated(true);
                    }
                }
                #endregion

                #region DeprecatedClass
                foreach (var dc  in rdfType.SelectTriplesByObject(RDFVocabulary.OWL.DEPRECATED_CLASS)) {
                    var ontClass  = new RDFOntologyClass((RDFResource)dc.Subject);
                    ontClass.SetDeprecated(true);
                    ontology.Model.ClassModel.AddClass(ontClass);
                }
                #endregion

                #region Restriction
                foreach (var r in rdfType.SelectTriplesByObject(RDFVocabulary.OWL.RESTRICTION)) {

                    #region OnProperty
                    var op   = onProperty.SelectTriplesBySubject((RDFResource)r.Subject).FirstOrDefault();
                    if (op  != null) {
                        var onProp     = ontology.Model.PropertyModel.SelectProperty(op.Object.ToString());
                        if (onProp    != null) {
                            var restr  = new RDFOntologyRestriction((RDFResource)r.Subject, onProp);
                            ontology.Model.ClassModel.AddClass(restr);
                        }
                        else {

                            //Raise warning event to inform the user: restriction cannot be imported from 
                            //graph, because definition of its applied property is not found in the model
                            RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("Restriction '{0}' cannot be imported from graph, because definition of its applied property '{1}' is not found in the model.", r.Subject, op.Object));

                        }
                    }
                    #endregion

                }
                #endregion

                #region DataRange
                foreach (var dr  in rdfType.SelectTriplesByObject(RDFVocabulary.OWL.DATA_RANGE)) {
                    ontology.Model.ClassModel.AddClass(new RDFOntologyDataRangeClass((RDFResource)dr.Subject));
                }
                #endregion

                #region Composite

                #region Union
                foreach (var u in unionOf) {
                    if  (u.TripleFlavor == RDFModelEnums.RDFTripleFlavors.SPO) {
                         var uc          = ontology.Model.ClassModel.SelectClass(u.Subject.ToString());
                         if (uc         != null) {

                            #region ClassToUnionClass
                            if (!(uc    is RDFOntologyUnionClass)) {
                                  uc     = new RDFOntologyUnionClass((RDFResource)u.Subject);
                                  ontology.Model.ClassModel.Classes[uc.PatternMemberID] = uc;
                            }
                            #endregion

                            #region DeserializeUnionCollection
                            var nilFound = false;
                            var itemRest = (RDFResource)u.Object;
                            while (!nilFound) {

                                #region rdf:first
                                var first  = ontGraph.SelectTriplesBySubject(itemRest)
                                                     .SelectTriplesByPredicate(RDFVocabulary.RDF.FIRST)
                                                     .FirstOrDefault();
                                if (first != null   && first.TripleFlavor == RDFModelEnums.RDFTripleFlavors.SPO) {
                                    var compClass    = ontology.Model.ClassModel.SelectClass(first.Object.ToString());
                                    if (compClass   != null) {
                                        ontology.Model.ClassModel.AddUnionOfRelation((RDFOntologyUnionClass)uc, compClass);
                                    }
                                    else {

                                        //Raise warning event to inform the user: union class cannot be completely imported
                                        //from graph, because definition of its compositing class is not found in the model
                                        RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("UnionClass '{0}' cannot be completely imported from graph, because definition of its compositing class '{1}' is not found in the model.", u.Subject, first.Object));
                                    
                                    }

                                    #region rdf:rest
                                    var rest         = ontGraph.SelectTriplesBySubject(itemRest)
                                                               .SelectTriplesByPredicate(RDFVocabulary.RDF.REST)
                                                               .FirstOrDefault();
                                    if (rest        != null) {
                                        if (rest.Object.Equals(RDFVocabulary.RDF.NIL)) {
                                            nilFound = true;
                                        }
                                        else {
                                            itemRest = (RDFResource)rest.Object;
                                        }
                                    }
                                    #endregion

                                }
                                else {
                                    nilFound = true;
                                }
                                #endregion

                            }
                            #endregion

                         }
                    }
                }
                #endregion

                #region Intersection
                foreach (var i in intersectionOf) {
                    if  (i.TripleFlavor == RDFModelEnums.RDFTripleFlavors.SPO) {
                         var ic          = ontology.Model.ClassModel.SelectClass(i.Subject.ToString());
                         if (ic         != null) {

                            #region ClassToIntersectionClass
                            if (!(ic    is RDFOntologyIntersectionClass)) {
                                  ic     = new RDFOntologyIntersectionClass((RDFResource)i.Subject);
                                  ontology.Model.ClassModel.Classes[ic.PatternMemberID] = ic;
                            }
                            #endregion

                            #region DeserializeIntersectionCollection
                            var nilFound   = false;
                            var itemRest   = (RDFResource)i.Object;
                            while (!nilFound) {

                                #region rdf:first
                                var first  = ontGraph.SelectTriplesBySubject(itemRest)
                                                     .SelectTriplesByPredicate(RDFVocabulary.RDF.FIRST)
                                                     .FirstOrDefault();
                                if (first != null   && first.TripleFlavor == RDFModelEnums.RDFTripleFlavors.SPO) {
                                    var compClass    = ontology.Model.ClassModel.SelectClass(first.Object.ToString());
                                    if (compClass   != null) {
                                        ontology.Model.ClassModel.AddIntersectionOfRelation((RDFOntologyIntersectionClass)ic, compClass);
                                    }
                                    else {

                                        //Raise warning event to inform the user: intersection class cannot be completely imported
                                        //from graph, because definition of its compositing class is not found in the model
                                        RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("IntersectionClass '{0}' cannot be completely imported from graph, because definition of its compositing class '{1}' is not found in the model.", i.Subject, first.Object));
                                    
                                    }


                                    #region rdf:rest
                                    var rest         = ontGraph.SelectTriplesBySubject(itemRest)
                                                               .SelectTriplesByPredicate(RDFVocabulary.RDF.REST)
                                                               .FirstOrDefault();
                                    if (rest        != null) {
                                        if (rest.Object.Equals(RDFVocabulary.RDF.NIL)) {
                                            nilFound = true;
                                        }
                                        else {
                                            itemRest = (RDFResource)rest.Object;
                                        }
                                    }
                                    #endregion

                                }
                                else {
                                    nilFound = true;
                                }
                                #endregion

                            }
                            #endregion

                         }
                    }
                }
                #endregion

                #region Complement
                foreach (var c in complementOf) {
                    if  (c.TripleFlavor == RDFModelEnums.RDFTripleFlavors.SPO) {
                         var cc  = ontology.Model.ClassModel.SelectClass(c.Subject.ToString());
                         if (cc != null) {
                             var compClass  = ontology.Model.ClassModel.SelectClass(c.Object.ToString());
                             if (compClass != null) {
                                 cc         = new RDFOntologyComplementClass((RDFResource)c.Subject, compClass);
                                 ontology.Model.ClassModel.Classes[cc.PatternMemberID] = cc;
                             }
                             else {

                                 //Raise warning event to inform the user: complement class cannot be imported
                                 //from graph, because definition of its complemented class is not found in the model
                                 RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("Class '{0}' cannot be imported from graph, because definition of its complement class '{1}' is not found in the model.", c.Subject, c.Object));

                             }
                         }
                         else {

                             //Raise warning event to inform the user: complement class cannot be imported 
                             //from graph, because its definition is not found in the model
                             RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("Class '{0}' cannot be imported from graph, because its definition is not found in the model.", c.Subject));

                         }
                    }
                }
                #endregion

                #endregion

                #endregion

                #endregion

                #region OntologyData

                #region Fact
                foreach (var c  in ontology.Model.ClassModel) {
                    foreach (var t in rdfType.SelectTriplesByObject((RDFResource)c.Value)) {
                        var f    = ontology.Data.SelectFact(t.Subject.ToString());
                        if (f   == null) {
                            f    = new RDFOntologyFact((RDFResource)t.Subject);
                            ontology.Data.AddFact(f);
                        }
                        ontology.Data.AddClassTypeRelation(f, c);
                    }
                }
                #endregion

                #endregion

                #region Finalization

                #region Restriction
                var restrictions = ontology.Model.ClassModel.Where(c => c.IsRestrictionClass()).ToList();
                foreach (var     r in restrictions) {

                    #region Cardinality
                    Int32 exC    = 0;
                    var  crEx    = cardinality.SelectTriplesBySubject((RDFResource)r.Value).FirstOrDefault();
                    if (crEx    != null   && crEx.TripleFlavor == RDFModelEnums.RDFTripleFlavors.SPL) {
                        if (crEx.Object   is RDFPlainLiteral) {
                            if (Regex.IsMatch(crEx.Object.ToString(), @"^[0-9]+$")) {
                                exC        = Int32.Parse(crEx.Object.ToString());
                            }
                        }
                        else {
                            if (((RDFTypedLiteral)crEx.Object).Datatype.Category == RDFModelEnums.RDFDatatypeCategory.Numeric) {
                                if (Regex.IsMatch(((RDFTypedLiteral)crEx.Object).Value, @"^[0-9]+$")) {
                                    exC    = Int32.Parse(((RDFTypedLiteral)crEx.Object).Value);
                                }
                            }
                        }
                    }
                    if (exC > 0) {
                        var cardRestr      = new RDFOntologyCardinalityRestriction((RDFResource)r.Value, ((RDFOntologyRestriction)r).OnProperty, exC, exC);
                        ontology.Model.ClassModel.Classes[r.PatternMemberID] = cardRestr;
                        continue;
                    }

                    Int32 minC   = 0;
                    var  crMin   = mincardinality.SelectTriplesBySubject((RDFResource)r.Value).FirstOrDefault();
                    if (crMin   != null   && crMin.TripleFlavor == RDFModelEnums.RDFTripleFlavors.SPL) {
                        if (crMin.Object  is RDFPlainLiteral) {
                            if (Regex.IsMatch(crMin.Object.ToString(), @"^[0-9]+$")) {
                                minC       = Int32.Parse(crMin.Object.ToString());
                            }
                        }
                        else {
                            if (((RDFTypedLiteral)crMin.Object).Datatype.Category == RDFModelEnums.RDFDatatypeCategory.Numeric) {
                                if (Regex.IsMatch(((RDFTypedLiteral)crMin.Object).Value, @"^[0-9]+$")) {
                                    minC   = Int32.Parse(((RDFTypedLiteral)crMin.Object).Value);
                                }
                            }
                        }
                    }

                    Int32 maxC   = 0;
                    var  crMax   = maxcardinality.SelectTriplesBySubject((RDFResource)r.Value).FirstOrDefault();
                    if (crMax   != null   && crMax.TripleFlavor == RDFModelEnums.RDFTripleFlavors.SPL) {
                        if (crMax.Object  is RDFPlainLiteral) {
                            if (Regex.IsMatch(crMax.Object.ToString(), @"^[0-9]+$")) {
                                maxC       = Int32.Parse(crMax.Object.ToString());
                            }
                        }
                        else {
                            if (((RDFTypedLiteral)crMax.Object).Datatype.Category == RDFModelEnums.RDFDatatypeCategory.Numeric) {
                                if (Regex.IsMatch(((RDFTypedLiteral)crMax.Object).Value, @"^[0-9]+$")) {
                                    maxC   = Int32.Parse(((RDFTypedLiteral)crMax.Object).Value);
                                }
                            }
                        }
                    }
                    if (minC > 0  ||  maxC > 0) {
                        var cardRestr      = new RDFOntologyCardinalityRestriction((RDFResource)r.Value, ((RDFOntologyRestriction)r).OnProperty, minC, maxC);
                        ontology.Model.ClassModel.Classes[r.PatternMemberID] = cardRestr;
                        continue;
                    }
                    #endregion

                    #region HasValue
                    var hvRes    = hasvalue.SelectTriplesBySubject((RDFResource)r.Value).FirstOrDefault();
                    if (hvRes   != null) {
                        if (hvRes.TripleFlavor   == RDFModelEnums.RDFTripleFlavors.SPO) {
                            var hvFct             = ontology.Data.SelectFact(hvRes.Object.ToString());
                            if (hvFct            != null) {
                                var hasvalueRestr = new RDFOntologyHasValueRestriction((RDFResource)r.Value, ((RDFOntologyRestriction)r).OnProperty, hvFct);
                                ontology.Model.ClassModel.Classes[r.PatternMemberID] = hasvalueRestr;
                                continue;
                            }
                            else {

                                //Raise warning event to inform the user: hasvalue restriction cannot be imported
                                //from graph, because definition of its required fact is not found in the data
                                RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("Restriction '{0}' cannot be imported from graph, because definition of its required fact '{1}' is not found in the data.", r.Value, hvRes.Object));

                            }
                        }
                        else {
                            var hasvalueRestr     = new RDFOntologyHasValueRestriction((RDFResource)r.Value, ((RDFOntologyRestriction)r).OnProperty, new RDFOntologyLiteral((RDFLiteral)hvRes.Object));
                            ontology.Model.ClassModel.Classes[r.PatternMemberID] = hasvalueRestr;
                            continue;
                        }
                    }
                    #endregion

                    #region AllValuesFrom
                    var avfRes       = allvaluesFrom.SelectTriplesBySubject((RDFResource)r.Value).FirstOrDefault();
                    if (avfRes      != null   && avfRes.TripleFlavor == RDFModelEnums.RDFTripleFlavors.SPO) {
                        var avfCls   = ontology.Model.ClassModel.SelectClass(avfRes.Object.ToString());
                        if (avfCls  != null) {
                            var allvaluesfromRestr = new RDFOntologyAllValuesFromRestriction((RDFResource)r.Value, ((RDFOntologyRestriction)r).OnProperty, avfCls);
                            ontology.Model.ClassModel.Classes[r.PatternMemberID] = allvaluesfromRestr;
                            continue;
                        }
                        else {

                            //Raise warning event to inform the user: allvaluesfrom restriction cannot be imported
                            //from graph, because definition of its required class is not found in the model
                            RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("Restriction '{0}' cannot be imported from graph, because definition of its required class '{1}' is not found in the model.", r.Value, avfRes.Object));

                        }
                    }
                    #endregion

                    #region SomeValuesFrom
                    var svfRes      = somevaluesFrom.SelectTriplesBySubject((RDFResource)r.Value).FirstOrDefault();
                    if (svfRes     != null   && svfRes.TripleFlavor == RDFModelEnums.RDFTripleFlavors.SPO) {
                        var svfCls  = ontology.Model.ClassModel.SelectClass(svfRes.Object.ToString());
                        if (svfCls != null) {
                            var somevaluesfromRestr = new RDFOntologySomeValuesFromRestriction((RDFResource)r.Value, ((RDFOntologyRestriction)r).OnProperty, svfCls);
                            ontology.Model.ClassModel.Classes[r.PatternMemberID] = somevaluesfromRestr;
                            continue;
                        }
                        else {

                            //Raise warning event to inform the user: somevaluesfrom restriction cannot be imported
                            //from graph, because definition of its required class is not found in the model
                            RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("Restriction '{0}' cannot be imported from graph, because definition of its required class '{1}' is not found in the model.", r.Value, svfRes.Object));

                        }
                    }
                    #endregion

                }
                #endregion

                #region Enumerate
                foreach (var e  in  oneOf) {
                    if  (e.TripleFlavor == RDFModelEnums.RDFTripleFlavors.SPO) {
                         var ec          = ontology.Model.ClassModel.SelectClass(e.Subject.ToString());
                         if (ec         != null && !ec.IsDataRangeClass()) {

                            #region ClassToEnumerateClass
                            if (!ec.IsEnumerateClass()) {
                                 ec      = new RDFOntologyEnumerateClass((RDFResource)e.Subject);
                                 ontology.Model.ClassModel.Classes[ec.PatternMemberID] = ec;
                            }
                            #endregion

                            #region DeserializeEnumerateCollection
                            var nilFound   = false;
                            var itemRest   = (RDFResource)e.Object;
                            while (!nilFound) {

                                #region rdf:first
                                var first  = ontGraph.SelectTriplesBySubject(itemRest)
                                                     .SelectTriplesByPredicate(RDFVocabulary.RDF.FIRST)
                                                     .FirstOrDefault();
                                if (first != null   && first.TripleFlavor == RDFModelEnums.RDFTripleFlavors.SPO) {
                                    var enumMember   = ontology.Data.SelectFact(first.Object.ToString());
                                    if (enumMember  != null) {
                                        ontology.Model.ClassModel.AddOneOfRelation((RDFOntologyEnumerateClass)ec, enumMember);
                                    }
									else {

                                        //Raise warning event to inform the user: enumerate class cannot be completely imported
                                        //from graph, because definition of its fact member is not found in the data
                                        RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("EnumerateClass '{0}' cannot be completely imported from graph, because definition of its fact member '{1}' is not found in the data.", e.Subject, first.Object));

			                        }

                                    #region rdf:rest
                                    var rest         = ontGraph.SelectTriplesBySubject(itemRest)
                                                               .SelectTriplesByPredicate(RDFVocabulary.RDF.REST)
                                                               .FirstOrDefault();
                                    if (rest        != null) {
                                        if (rest.Object.Equals(RDFVocabulary.RDF.NIL)) {
                                            nilFound = true;
                                        }
                                        else {
                                            itemRest = (RDFResource)rest.Object;
                                        }
                                    }
                                    #endregion

                                }
                                else {
                                    nilFound = true;
                                }
                                #endregion

                            }
                            #endregion

                         }
                         else {
                             if (ec     == null) {

                                 //Raise warning event to inform the user: enumerate class cannot be imported
                                 //from graph, because its definition is not found in the model
                                 RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("EnumerateClass '{0}' cannot be imported from graph, because its definition is not found in the model.", e.Subject));

                             }
                         }
                    }
                }
                #endregion

                #region DataRange
                foreach (var d in oneOf) {
                    if  (d.TripleFlavor == RDFModelEnums.RDFTripleFlavors.SPO) {
                         var dr          = ontology.Model.ClassModel.SelectClass(d.Subject.ToString());
                         if (dr         != null && !dr.IsEnumerateClass()) {

                            #region ClassToDataRangeClass
                            if (!dr.IsDataRangeClass()) {
                                 dr      = new RDFOntologyDataRangeClass((RDFResource)d.Subject);
                                 ontology.Model.ClassModel.Classes[dr.PatternMemberID] = dr;
                            }
                            #endregion

                            #region DeserializeDataRangeCollection
                            var nilFound   = false;
                            var itemRest   = (RDFResource)d.Object;
                            while (!nilFound) {

                                #region rdf:first
                                var first  = ontGraph.SelectTriplesBySubject(itemRest)
                                                     .SelectTriplesByPredicate(RDFVocabulary.RDF.FIRST)
                                                     .FirstOrDefault();
                                if (first != null   && first.TripleFlavor == RDFModelEnums.RDFTripleFlavors.SPL) {
                                    ontology.Model.ClassModel.AddOneOfRelation((RDFOntologyDataRangeClass)dr, new RDFOntologyLiteral((RDFLiteral)first.Object));

                                    #region rdf:rest
                                    var rest         = ontGraph.SelectTriplesBySubject(itemRest)
                                                               .SelectTriplesByPredicate(RDFVocabulary.RDF.REST)
                                                               .FirstOrDefault();
                                    if (rest        != null) {
                                        if (rest.Object.Equals(RDFVocabulary.RDF.NIL)) {
                                            nilFound = true;
                                        }
                                        else {
                                            itemRest = (RDFResource)rest.Object;
                                        }
                                    }
                                    #endregion

                                }
                                else {
                                    nilFound = true;
                                }
                                #endregion

                            }
                            #endregion

                         }
                         else {
                             if (dr     == null) {

                                 //Raise warning event to inform the user: datarange class cannot be imported from
                                 //graph, because its definition is not found in the model
                                 RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("DataRangeClass '{0}' cannot be imported from graph, because its definition is not found in the model.", d.Subject));

                             }
                         }
                    }
                }
                #endregion

                #region Domain/Range
                foreach (var p in ontology.Model.PropertyModel) {
                    
                    #region Domain
                    var d   = domain.SelectTriplesBySubject((RDFResource)p.Value).FirstOrDefault();
                    if (d  != null   && d.TripleFlavor == RDFModelEnums.RDFTripleFlavors.SPO) {
                        var domainClass  = ontology.Model.ClassModel.SelectClass(d.Object.ToString());
                        if (domainClass != null) {
                            p.SetDomain(domainClass);
                        }
                        else {

                            //Raise warning event to inform the user: domain constraint cannot be imported from graph, 
                            //because definition of required class is not found in the model
                            RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("Domain constraint on property '{0}' cannot be imported from graph, because definition of required class '{1}' is not found in the model.", p.Value, d.Object));

                        }
                    }
                    #endregion

                    #region Range
                    var r   = range.SelectTriplesBySubject((RDFResource)p.Value).FirstOrDefault();
                    if (r  != null  && r.TripleFlavor == RDFModelEnums.RDFTripleFlavors.SPO) {
                        var rangeClass  = ontology.Model.ClassModel.SelectClass(r.Object.ToString());
                        if (rangeClass != null) {
                            p.SetRange(rangeClass);
                        }
                        else {

                            //Raise warning event to inform the user: range constraint cannot be imported from graph, 
                            //because definition of required class is not found in the model
                            RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("Range constraint on property '{0}' cannot be imported from graph, because definition of required class '{1}' is not found in the model.", p.Value, r.Object));

                        }
                    }
                    #endregion

                }
                #endregion

                #region PropertyModel Relations
                foreach (var p in ontology.Model.PropertyModel) {
                    
                    #region SubPropertyOf
                    foreach (var spof in subpropOf.SelectTriplesBySubject((RDFResource)p.Value)) {
                        if  (spof.TripleFlavor   == RDFModelEnums.RDFTripleFlavors.SPO) {
                             var superProp        = ontology.Model.PropertyModel.SelectProperty(spof.Object.ToString());
                             if (superProp       != null) {
                                 if (p.IsObjectProperty()        && superProp.IsObjectProperty()) {
                                     ontology.Model.PropertyModel.AddSubPropertyOfRelation((RDFOntologyObjectProperty)p,   (RDFOntologyObjectProperty)superProp);
                                 }
                                 else if (p.IsDatatypeProperty() && superProp.IsDatatypeProperty()) {
                                     ontology.Model.PropertyModel.AddSubPropertyOfRelation((RDFOntologyDatatypeProperty)p, (RDFOntologyDatatypeProperty)superProp);
                                 }
                             }
                             else {

                                 //Raise warning event to inform the user: subpropertyof relation cannot be imported
                                 //from graph, because definition of property is not found in the model
                                 RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("SubPropertyOf relation on property '{0}' cannot be imported from graph, because definition of property '{1}' is not found in the model.", p.Value, spof.Object));

                             }
                        }
                    }
                    #endregion

                    #region EquivalentProperty
                    foreach (var eqpr in equivpropOf.SelectTriplesBySubject((RDFResource)p.Value)) {
                        if  (eqpr.TripleFlavor   == RDFModelEnums.RDFTripleFlavors.SPO) {
                             var equivProp        = ontology.Model.PropertyModel.SelectProperty(eqpr.Object.ToString());
                             if (equivProp       != null) {
                                 if (p.IsObjectProperty()        && equivProp.IsObjectProperty()) {
                                     ontology.Model.PropertyModel.AddEquivalentPropertyRelation((RDFOntologyObjectProperty)p,   (RDFOntologyObjectProperty)equivProp);
                                 }
                                 else if (p.IsDatatypeProperty() && equivProp.IsDatatypeProperty()) {
                                     ontology.Model.PropertyModel.AddEquivalentPropertyRelation((RDFOntologyDatatypeProperty)p, (RDFOntologyDatatypeProperty)equivProp);
                                 }
                             }
                             else {

                                 //Raise warning event to inform the user: equivalentproperty relation cannot be imported
                                 //from graph, because definition of property is not found in the model
                                 RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("EquivalentProperty relation on property '{0}' cannot be imported from graph, because definition of property '{1}' is not found in the model.", p.Value, eqpr.Object));

                             }
                        }
                    }
                    #endregion

                    #region InverseOf
                    if (p.IsObjectProperty()) {
                        foreach (var inof in inverseOf.SelectTriplesBySubject((RDFResource)p.Value)) {
                            if  (inof.TripleFlavor   == RDFModelEnums.RDFTripleFlavors.SPO) {
                                 var invProp          = ontology.Model.PropertyModel.SelectProperty(inof.Object.ToString());
                                 if (invProp != null && invProp.IsObjectProperty()) {
                                     ontology.Model.PropertyModel.AddInverseOfRelation((RDFOntologyObjectProperty)p, (RDFOntologyObjectProperty)invProp);
                                 }
                                 else {

                                     //Raise warning event to inform the user: inverseof relation cannot be imported
                                     //from graph, because definition of property is not found in the model
                                     RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("InverseOf relation on property '{0}' cannot be imported from graph, because definition of property '{1}' is not found in the model.", p.Value, inof.Object));

                                 }
                            }
                        }
                    }
                    #endregion

                }
                #endregion

                #region ClassModel Relations
                foreach (var c in ontology.Model.ClassModel) {

                    #region SubClassOf
                    foreach (var scof in subclassOf.SelectTriplesBySubject((RDFResource)c.Value)) {
                        if  (scof.TripleFlavor   == RDFModelEnums.RDFTripleFlavors.SPO) {
                             var superClass       = ontology.Model.ClassModel.SelectClass(scof.Object.ToString());
                             if (superClass      != null) {
                                 ontology.Model.ClassModel.AddSubClassOfRelation(c, superClass);
                             }
                             else {

                                 //Raise warning event to inform the user: subclassof relation cannot be imported
                                 //from graph, because definition of class is not found in the model
                                 RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("SubClassOf relation on class '{0}' cannot be imported from graph, because definition of class '{1}' is not found in the model.", c.Value, scof.Object));

                             }
                        }
                    }
                    #endregion

                    #region EquivalentClass
                    foreach (var eqcl in equivclassOf.SelectTriplesBySubject((RDFResource)c.Value)) {
                        if  (eqcl.TripleFlavor   == RDFModelEnums.RDFTripleFlavors.SPO) {
                             var equivClass       = ontology.Model.ClassModel.SelectClass(eqcl.Object.ToString());
                             if (equivClass      != null) {
                                 ontology.Model.ClassModel.AddEquivalentClassRelation(c, equivClass);
                             }
                             else {

                                 //Raise warning event to inform the user: equivalentclass relation cannot be imported
                                 //from graph, because definition of class is not found in the model
                                 RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("EquivalentClass relation on class '{0}' cannot be imported from graph, because definition of class '{1}' is not found in the model.", c.Value, eqcl.Object));

                             }
                        }
                    }
                    #endregion

                    #region DisjointWith
                    foreach (var djwt in disjclassWith.SelectTriplesBySubject((RDFResource)c.Value)) {
                        if  (djwt.TripleFlavor   == RDFModelEnums.RDFTripleFlavors.SPO) {
                             var disjWith         = ontology.Model.ClassModel.SelectClass(djwt.Object.ToString());
                             if (disjWith        != null) {
                                 ontology.Model.ClassModel.AddDisjointWithRelation(c, disjWith);
                             }
                             else {

                                 //Raise warning event to inform the user: disjointwith relation cannot be imported
                                 //from graph, because definition of class is not found in the model
                                 RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("DisjointWith relation on class '{0}' cannot be imported from graph, because definition of class '{1}' is not found in the model.", c.Value, djwt.Object));

                             }
                        }
                    }
                    #endregion

                }
                #endregion

                #region Data Relations

                #region SameAs
                foreach (var t in sameAs) {
                    if  (t.TripleFlavor   == RDFModelEnums.RDFTripleFlavors.SPO) {
                         var subjFct       = ontology.Data.SelectFact(t.Subject.ToString());
                         if (subjFct      != null) {
                             var objFct    = ontology.Data.SelectFact(t.Object.ToString());
                             if (objFct   != null) {
                                 ontology.Data.AddSameAsRelation(subjFct, objFct);
                             }
                             else {

                                 //Raise warning event to inform the user: sameas relation cannot be imported
                                 //from graph, because definition of fact is not found in the data
                                 RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("SameAs relation on fact '{0}' cannot be imported from graph, because definition of fact '{1}' is not found in the data.", t.Subject, t.Object));

                             }
                         }
                         else {

                             //Raise warning event to inform the user: sameas relation cannot be imported
                             //from graph, because definition of fact is not found in the data
                             RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("SameAs relation on fact '{0}' cannot be imported from graph, because its definition is not found in the data.", t.Subject));

                         }
                    }
                }
                #endregion

                #region DifferentFrom
                foreach (var t in differentFrom) {
                    if  (t.TripleFlavor   == RDFModelEnums.RDFTripleFlavors.SPO) {
                         var subjFct       = ontology.Data.SelectFact(t.Subject.ToString());
                         if (subjFct      != null) {
                             var objFct    = ontology.Data.SelectFact(t.Object.ToString());
                             if (objFct   != null) {
                                 ontology.Data.AddDifferentFromRelation(subjFct, objFct);
                             }
                             else {

                                 //Raise warning event to inform the user: differentfrom relation cannot be imported
                                 //from graph, because definition of fact is not found in the data
                                 RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("DifferentFrom relation on fact '{0}' cannot be imported from graph, because definition of fact '{1}' is not found in the data.", t.Subject, t.Object));

                             }
                         }
                         else {

                             //Raise warning event to inform the user: differentfrom relation cannot be imported
                             //from graph, because its definition is not found in the data
                             RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("DifferentFrom relation on fact '{0}' cannot be imported from graph, because its definition is not found in the data.", t.Subject));

                         }
                    }
                }
                #endregion

                #region Assertion
                foreach (var p      in ontology.Model.PropertyModel) {
                    foreach (var t  in ontGraph.SelectTriplesByPredicate((RDFResource)p.Value)) {
                        var subjFct  = ontology.Data.SelectFact(t.Subject.ToString());
                        if (subjFct != null) {
                            if (p.IsObjectProperty()) {
                                if (t.TripleFlavor  == RDFModelEnums.RDFTripleFlavors.SPO) {
                                    var objFct       = ontology.Data.SelectFact(t.Object.ToString());
                                    if (objFct      != null) {
                                        ontology.Data.AddAssertionRelation(subjFct, (RDFOntologyObjectProperty)p, objFct);
                                    }
                                    else {

                                        //Raise warning event to inform the user: assertion relation cannot be imported
                                        //from graph, because definition of fact is not found in the data
                                        RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("Assertion relation on fact '{0}' cannot be imported from graph, because definition of fact '{1}' is not found in the data.", t.Subject, t.Object));

                                    }
                                }
                                else {

                                    //Raise warning event to inform the user: assertion relation cannot be imported
                                    //from graph, because object property links to a literal
                                    RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("Assertion relation on fact '{0}' cannot be imported from graph, because object property '{1}' links to a literal.", t.Subject, p));

                                }
                            }
                            else if (p.IsDatatypeProperty()) {
                                 if (t.TripleFlavor == RDFModelEnums.RDFTripleFlavors.SPL) {
                                     ontology.Data.AddAssertionRelation(subjFct, (RDFOntologyDatatypeProperty)p, new RDFOntologyLiteral((RDFLiteral)t.Object));
                                 }
                                 else {

                                     //Raise warning event to inform the user: assertion relation cannot be imported
                                     //from graph, because datatype property links to a fact
                                     RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("Assertion relation on fact '{0}' cannot be imported from graph, because datatype property '{1}' links to a fact.", t.Subject, p));

                                 }
                            }
                        }
                        else {

                            //Raise warning event to inform the user: assertion relation cannot be imported
                            //from graph, because definition of fact is not found in the data
                            RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("Assertion relation on fact '{0}' cannot be imported from graph, because definition of the fact is not found in the data. Ensure its classtype relation is specified.", t.Subject));

                        }
                    }
                }
                #endregion

                #endregion

                #region Annotations

                #region Ontology

                #region VersionInfo
                foreach (var t in versionInfo.SelectTriplesBySubject((RDFResource)ontology.Value)) {
                    if  (t.TripleFlavor == RDFModelEnums.RDFTripleFlavors.SPL) {
                         ontology.AddVersionInfoAnnotation(new RDFOntologyLiteral((RDFLiteral)t.Object));
                    }
                    else {

                        //Raise warning event to inform the user: versioninfo annotation on ontology 
                        //cannot be imported from graph, because it does not link a literal
                        RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("VersionInfo annotation on ontology '{0}' cannot be imported from graph, because it does not link a literal.", ontology.Value, t.Object));

                    }
                }
                #endregion

                #region Comment
                foreach (var t in comment.SelectTriplesBySubject((RDFResource)ontology.Value)) {
                    if  (t.TripleFlavor == RDFModelEnums.RDFTripleFlavors.SPL) {
                         ontology.AddCommentAnnotation(new RDFOntologyLiteral((RDFLiteral)t.Object));
                    }
                    else {

                        //Raise warning event to inform the user: comment annotation on ontology 
                        //cannot be imported from graph, because it does not link a literal
                        RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("Comment annotation on ontology '{0}' cannot be imported from graph, because it does not link a literal.", ontology.Value, t.Object));

                    }
                }
                #endregion

                #region Label
                foreach (var t in label.SelectTriplesBySubject((RDFResource)ontology.Value)) {
                    if  (t.TripleFlavor == RDFModelEnums.RDFTripleFlavors.SPL) {
                         ontology.AddLabelAnnotation(new RDFOntologyLiteral((RDFLiteral)t.Object));
                    }
                    else {

                        //Raise warning event to inform the user: label annotation on ontology 
                        //cannot be imported from graph, because it does not link a literal
                        RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("Label annotation on ontology '{0}' cannot be imported from graph, because it does not link a literal.", ontology.Value, t.Object));

                    }
                }
                #endregion

                #region SeeAlso
                foreach (var t in seeAlso.SelectTriplesBySubject((RDFResource)ontology.Value)) {
                    if  (t.TripleFlavor == RDFModelEnums.RDFTripleFlavors.SPL) {
                         ontology.AddSeeAlsoAnnotation(new RDFOntologyLiteral((RDFLiteral)t.Object));
                    }
                    else {
                        RDFOntologyResource resource = ontology.Model.ClassModel.SelectClass(t.Object.ToString());
                        if (resource         == null) {
                            resource          = ontology.Model.PropertyModel.SelectProperty(t.Object.ToString());
                            if (resource     == null) {
                                resource      = ontology.Data.SelectFact(t.Object.ToString());
                                if (resource == null) {
                                    resource  = new RDFOntologyResource();
                                    resource.Value           = t.Object;
                                    resource.PatternMemberID = t.Object.PatternMemberID;

                                    //Raise warning event to inform the user: seealso annotation on ontology 
                                    //has been imported from graph, but linking an unknown generic resource
                                    RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("SeeAlso annotation on ontology '{0}' has been imported from graph, but linking an unknown generic resource '{1}'.", ontology.Value, t.Object));

                                }
                            }
                        }
                        ontology.AddSeeAlsoAnnotation(resource);
                    }
                }
                #endregion

                #region IsDefinedBy
                foreach (var t in isDefinedBy.SelectTriplesBySubject((RDFResource)ontology.Value)) {
                    if  (t.TripleFlavor == RDFModelEnums.RDFTripleFlavors.SPL) {
                         ontology.AddIsDefinedByAnnotation(new RDFOntologyLiteral((RDFLiteral)t.Object));
                    }
                    else {
                        RDFOntologyResource isDefBy = ontology.Model.ClassModel.SelectClass(t.Object.ToString());
                        if (isDefBy         == null) {
                            isDefBy          = ontology.Model.PropertyModel.SelectProperty(t.Object.ToString());
                            if (isDefBy     == null) {
                                isDefBy      = ontology.Data.SelectFact(t.Object.ToString());
                                if (isDefBy == null) {
                                    isDefBy  = new RDFOntologyResource();
                                    isDefBy.Value           = t.Object;
                                    isDefBy.PatternMemberID = t.Object.PatternMemberID;

                                    //Raise warning event to inform the user: isdefinedby annotation on ontology 
                                    //has been imported from graph, but linking an unknown generic resource
                                    RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("IsDefinedBy annotation on ontology '{0}' has been imported from graph, but linking an unknown generic resource '{1}'.", ontology.Value, t.Object));

                                }
                            }
                        }
                        ontology.AddIsDefinedByAnnotation(isDefBy);
                    }
                }
                #endregion

                #region BackwardCompatibleWith
                foreach (var t in bcwcompWith.SelectTriplesBySubject((RDFResource)ontology.Value)) {
                    if  (t.TripleFlavor == RDFModelEnums.RDFTripleFlavors.SPO) {
                         ontology.AddBackwardCompatibleWithAnnotation(new RDFOntology((RDFResource)t.Object));
                    }
                    else {

                        //Raise warning event to inform the user: backwardcompatiblewith annotation on ontology 
                        //cannot be imported from graph, because it does not link a resource
                        RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("BackwardCompatibleWith annotation on ontology '{0}' cannot be imported from graph, because it does not link a resource.", ontology.Value, t.Object));

                    }
                }
                #endregion

                #region IncompatibleWith
                foreach (var t in incompWith.SelectTriplesBySubject((RDFResource)ontology.Value)) {
                    if  (t.TripleFlavor == RDFModelEnums.RDFTripleFlavors.SPO) {
                         ontology.AddIncompatibleWithAnnotation(new RDFOntology((RDFResource)t.Object));
                    }
                    else {

                        //Raise warning event to inform the user: incompatiblewith annotation on ontology 
                        //cannot be imported from graph, because it does not link a resource
                        RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("IncompatibleWith annotation on ontology '{0}' cannot be imported from graph, because it does not link a resource.", ontology.Value, t.Object));

                    }
                }
                #endregion

                #region PriorVersion
                foreach (var t in priorVersion.SelectTriplesBySubject((RDFResource)ontology.Value)) {
                    if  (t.TripleFlavor == RDFModelEnums.RDFTripleFlavors.SPO) {
                         ontology.AddPriorVersionAnnotation(new RDFOntology((RDFResource)t.Object));
                    }
                    else {

                        //Raise warning event to inform the user: priorversion annotation on ontology 
                        //cannot be imported from graph, because it does not link a resource
                        RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("PriorVersion annotation on ontology '{0}' cannot be imported from graph, because it does not link a resource.", ontology.Value, t.Object));

                    }
                }
                #endregion

                #region Imports
                foreach(var t in imports.SelectTriplesBySubject((RDFResource)ontology.Value)) {
                    if (t.TripleFlavor  == RDFModelEnums.RDFTripleFlavors.SPO) {
                        ontology.AddImportsAnnotation(new RDFOntology((RDFResource)t.Object));
                    }
                    else {

                        //Raise warning event to inform the user: imports annotation on ontology 
                        //cannot be imported from graph, because it does not link a resource
                        RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("Imports annotation on ontology '{0}' cannot be imported from graph, because it does not link a resource.", ontology.Value, t.Object));

                    }
                }
                #endregion

                #region CustomAnnotations
                var annotProps   = ontology.Model.PropertyModel.AnnotationPropertiesEnumerator;
                while (annotProps.MoveNext()) {
                    foreach (var t in ontGraph.SelectTriplesBySubject((RDFResource)ontology.Value)
                                              .SelectTriplesByPredicate((RDFResource)annotProps.Current.Value)) {
                        if  (t.TripleFlavor  == RDFModelEnums.RDFTripleFlavors.SPL) {
                             ontology.AddCustomAnnotation((RDFOntologyAnnotationProperty)annotProps.Current, new RDFOntologyLiteral((RDFLiteral)t.Object));
                        }
                        else {
                            RDFOntologyResource custAnn = ontology.Model.ClassModel.SelectClass(t.Object.ToString());
                            if (custAnn         == null) {
                                custAnn          = ontology.Model.PropertyModel.SelectProperty(t.Object.ToString());
                                if (custAnn     == null) {
                                    custAnn      = ontology.Data.SelectFact(t.Object.ToString());
                                    if (custAnn == null) {
                                        custAnn  = new RDFOntologyResource();
                                        custAnn.Value           = t.Object;
                                        custAnn.PatternMemberID = t.Object.PatternMemberID;

                                        //Raise warning event to inform the user: custom annotation on ontology 
                                        //has been imported from graph, but linking an unknown generic resource
                                        RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("Custom annotation '{0}' on ontology '{1}' has been imported from graph, but linking an unknown generic resource '{2}'.", annotProps.Current.Value, ontology.Value, t.Object));

                                    }
                                }
                            }
                            ontology.AddCustomAnnotation((RDFOntologyAnnotationProperty)annotProps.Current, custAnn);
                        }

                    }
                }
                #endregion

                #endregion

                #region Classes
                foreach (var c in ontology.Model.ClassModel) {

                    #region VersionInfo
                    foreach (var t in versionInfo.SelectTriplesBySubject((RDFResource)c.Value)) {
                        if  (t.TripleFlavor == RDFModelEnums.RDFTripleFlavors.SPL) {
                             ontology.Model.ClassModel.AddVersionInfoAnnotation(c, new RDFOntologyLiteral((RDFLiteral)t.Object));
                        }
                        else {

                            //Raise warning event to inform the user: versioninfo annotation on class 
                            //cannot be imported from graph, because it does not link a literal
                            RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("VersionInfo annotation on class '{0}' cannot be imported from graph, because it does not link a literal.", c.Value, t.Object));

                        }
                    }
                    #endregion

                    #region Comment
                    foreach (var t in comment.SelectTriplesBySubject((RDFResource)c.Value)) {
                        if  (t.TripleFlavor == RDFModelEnums.RDFTripleFlavors.SPL) {
                             ontology.Model.ClassModel.AddCommentAnnotation(c, new RDFOntologyLiteral((RDFLiteral)t.Object));
                        }
                        else {

                            //Raise warning event to inform the user: comment annotation on class 
                            //cannot be imported from graph, because it does not link a literal
                            RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("Comment annotation on class '{0}' cannot be imported from graph, because it does not link a literal.", c.Value, t.Object));

                        }
                    }
                    #endregion

                    #region Label
                    foreach (var t in label.SelectTriplesBySubject((RDFResource)c.Value)) {
                        if  (t.TripleFlavor == RDFModelEnums.RDFTripleFlavors.SPL) {
                             ontology.Model.ClassModel.AddLabelAnnotation(c, new RDFOntologyLiteral((RDFLiteral)t.Object));
                        }
                        else {

                            //Raise warning event to inform the user: label annotation on class 
                            //cannot be imported from graph, because it does not link a literal
                            RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("Label annotation on class '{0}' cannot be imported from graph, because it does not link a literal.", c.Value, t.Object));

                        }
                    }
                    #endregion

                    #region SeeAlso
                    foreach (var t in seeAlso.SelectTriplesBySubject((RDFResource)c.Value)) {
                        if  (t.TripleFlavor == RDFModelEnums.RDFTripleFlavors.SPL) {
                             ontology.Model.ClassModel.AddSeeAlsoAnnotation(c, new RDFOntologyLiteral((RDFLiteral)t.Object));
                        }
                        else {
                            RDFOntologyResource resource = ontology.Model.ClassModel.SelectClass(t.Object.ToString());
                            if (resource         == null) {
                                resource          = ontology.Model.PropertyModel.SelectProperty(t.Object.ToString());
                                if (resource     == null) {
                                    resource      = ontology.Data.SelectFact(t.Object.ToString());
                                    if (resource == null) {
                                        resource  = new RDFOntologyResource();
                                        resource.Value           = t.Object;
                                        resource.PatternMemberID = t.Object.PatternMemberID;

                                        //Raise warning event to inform the user: seealso annotation on class 
                                        //has been imported from graph, but linking an unknown generic resource
                                        RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("SeeAlso annotation on class '{0}' has been imported from graph, but linking an unknown generic resource '{1}'.", c.Value, t.Object));

                                    }
                                }
                            }
                            ontology.Model.ClassModel.AddSeeAlsoAnnotation(c, resource);
                        }
                    }
                    #endregion

                    #region IsDefinedBy
                    foreach (var t in isDefinedBy.SelectTriplesBySubject((RDFResource)c.Value)) {
                        if  (t.TripleFlavor == RDFModelEnums.RDFTripleFlavors.SPL) {
                             ontology.Model.ClassModel.AddIsDefinedByAnnotation(c, new RDFOntologyLiteral((RDFLiteral)t.Object));
                        }
                        else {
                            RDFOntologyResource isDefBy = ontology.Model.ClassModel.SelectClass(t.Object.ToString());
                            if (isDefBy         == null) {
                                isDefBy          = ontology.Model.PropertyModel.SelectProperty(t.Object.ToString());
                                if (isDefBy     == null) {
                                    isDefBy      = ontology.Data.SelectFact(t.Object.ToString());
                                    if (isDefBy == null) {
                                        isDefBy  = new RDFOntologyResource();
                                        isDefBy.Value           = t.Object;
                                        isDefBy.PatternMemberID = t.Object.PatternMemberID;

                                        //Raise warning event to inform the user: isdefinedby annotation on class 
                                        //has been imported from graph, but linking an unknown generic resource
                                        RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("IsDefinedBy annotation on class '{0}' has been imported from graph, but linking an unknown generic resource '{1}'.", c.Value, t.Object));

                                    }
                                }
                            }
                            ontology.Model.ClassModel.AddIsDefinedByAnnotation(c, isDefBy);
                        }
                    }
                    #endregion

                    #region CustomAnnotations
                    annotProps       = ontology.Model.PropertyModel.AnnotationPropertiesEnumerator;
                    while (annotProps.MoveNext()) {
                        foreach (var t in ontGraph.SelectTriplesBySubject((RDFResource)c.Value)
                                                  .SelectTriplesByPredicate((RDFResource)annotProps.Current.Value)) {
                            if  (t.TripleFlavor  == RDFModelEnums.RDFTripleFlavors.SPL) {
                                 ontology.Model.ClassModel.AddCustomAnnotation(c, (RDFOntologyAnnotationProperty)annotProps.Current, new RDFOntologyLiteral((RDFLiteral)t.Object));
                            }
                            else {
                                RDFOntologyResource custAnn = ontology.Model.ClassModel.SelectClass(t.Object.ToString());
                                if (custAnn         == null) {
                                    custAnn          = ontology.Model.PropertyModel.SelectProperty(t.Object.ToString());
                                    if (custAnn     == null) {
                                        custAnn      = ontology.Data.SelectFact(t.Object.ToString());
                                        if (custAnn == null) {
                                            custAnn  = new RDFOntologyResource();
                                            custAnn.Value           = t.Object;
                                            custAnn.PatternMemberID = t.Object.PatternMemberID;

                                            //Raise warning event to inform the user: custom annotation on class 
                                            //has been imported from graph, but linking an unknown generic resource
                                            RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("Custom annotation '{0}' on class '{1}' has been imported from graph, but linking an unknown generic resource '{2}'.", annotProps.Current.Value, c.Value, t.Object));

                                        }
                                    }
                                }
                                ontology.Model.ClassModel.AddCustomAnnotation(c, (RDFOntologyAnnotationProperty)annotProps.Current, custAnn);
                            }

                        }
                    }
                    #endregion

                }
                #endregion

                #region Properties
                foreach (var p in ontology.Model.PropertyModel) {

                    #region VersionInfo
                    foreach (var t in versionInfo.SelectTriplesBySubject((RDFResource)p.Value)) {
                        if  (t.TripleFlavor == RDFModelEnums.RDFTripleFlavors.SPL) {
                             ontology.Model.PropertyModel.AddVersionInfoAnnotation(p, new RDFOntologyLiteral((RDFLiteral)t.Object));
                        }
                        else {

                            //Raise warning event to inform the user: versioninfo annotation on property 
                            //cannot be imported from graph, because it does not link a literal
                            RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("VersionInfo annotation on property '{0}' cannot be imported from graph, because it does not link a literal.", p.Value, t.Object));

                        }
                    }
                    #endregion

                    #region Comment
                    foreach (var t in comment.SelectTriplesBySubject((RDFResource)p.Value)) {
                        if  (t.TripleFlavor == RDFModelEnums.RDFTripleFlavors.SPL) {
                             ontology.Model.PropertyModel.AddCommentAnnotation(p, new RDFOntologyLiteral((RDFLiteral)t.Object));
                        }
                        else {

                            //Raise warning event to inform the user: comment annotation on property 
                            //cannot be imported from graph, because it does not link a literal
                            RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("Comment annotation on property '{0}' cannot be imported from graph, because it does not link a literal.", p.Value, t.Object));

                        }
                    }
                    #endregion

                    #region Label
                    foreach (var t in label.SelectTriplesBySubject((RDFResource)p.Value)) {
                        if  (t.TripleFlavor == RDFModelEnums.RDFTripleFlavors.SPL) {
                             ontology.Model.PropertyModel.AddLabelAnnotation(p, new RDFOntologyLiteral((RDFLiteral)t.Object));
                        }
                        else {

                            //Raise warning event to inform the user: label annotation on property 
                            //cannot be imported from graph, because it does not link a literal
                            RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("Label annotation on property '{0}' cannot be imported from graph, because it does not link a literal.", p.Value, t.Object));

                        }
                    }
                    #endregion

                    #region SeeAlso
                    foreach (var t in seeAlso.SelectTriplesBySubject((RDFResource)p.Value)) {
                        if  (t.TripleFlavor == RDFModelEnums.RDFTripleFlavors.SPL) {
                             ontology.Model.PropertyModel.AddSeeAlsoAnnotation(p, new RDFOntologyLiteral((RDFLiteral)t.Object));
                        }
                        else {
                            RDFOntologyResource resource = ontology.Model.ClassModel.SelectClass(t.Object.ToString());
                            if (resource         == null) {
                                resource          = ontology.Model.PropertyModel.SelectProperty(t.Object.ToString());
                                if (resource     == null) {
                                    resource      = ontology.Data.SelectFact(t.Object.ToString());
                                    if (resource == null) {
                                        resource  = new RDFOntologyResource();
                                        resource.Value           = t.Object;
                                        resource.PatternMemberID = t.Object.PatternMemberID;

                                        //Raise warning event to inform the user: seealso annotation on property 
                                        //has been imported from graph, but linking an unknown generic resource
                                        RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("SeeAlso annotation on property '{0}' has been imported from graph, but linking an unknown generic resource '{1}'.", p.Value, t.Object));

                                    }
                                }
                            }
                            ontology.Model.PropertyModel.AddSeeAlsoAnnotation(p, resource);
                        }
                    }
                    #endregion

                    #region IsDefinedBy
                    foreach (var t in isDefinedBy.SelectTriplesBySubject((RDFResource)p.Value)) {
                        if  (t.TripleFlavor == RDFModelEnums.RDFTripleFlavors.SPL) {
                             ontology.Model.PropertyModel.AddIsDefinedByAnnotation(p, new RDFOntologyLiteral((RDFLiteral)t.Object));
                        }
                        else {
                            RDFOntologyResource isDefBy = ontology.Model.ClassModel.SelectClass(t.Object.ToString());
                            if (isDefBy         == null) {
                                isDefBy          = ontology.Model.PropertyModel.SelectProperty(t.Object.ToString());
                                if (isDefBy     == null) {
                                    isDefBy      = ontology.Data.SelectFact(t.Object.ToString());
                                    if (isDefBy == null) {
                                        isDefBy  = new RDFOntologyResource();
                                        isDefBy.Value           = t.Object;
                                        isDefBy.PatternMemberID = t.Object.PatternMemberID;

                                        //Raise warning event to inform the user: isdefinedby annotation on property 
                                        //has been imported from graph, but linking an unknown generic resource
                                        RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("IsDefinedBy annotation on property '{0}' has been imported from graph, but linking an unknown generic resource '{1}'.", p.Value, t.Object));

                                    }
                                }
                            }
                            ontology.Model.PropertyModel.AddIsDefinedByAnnotation(p, isDefBy);
                        }
                    }
                    #endregion

                    #region CustomAnnotations
                    annotProps       = ontology.Model.PropertyModel.AnnotationPropertiesEnumerator;
                    while (annotProps.MoveNext()) {
                        foreach (var t in ontGraph.SelectTriplesBySubject((RDFResource)p.Value)
                                                  .SelectTriplesByPredicate((RDFResource)annotProps.Current.Value)) {
                            if  (t.TripleFlavor  == RDFModelEnums.RDFTripleFlavors.SPL) {
                                 ontology.Model.PropertyModel.AddCustomAnnotation(p, (RDFOntologyAnnotationProperty)annotProps.Current, new RDFOntologyLiteral((RDFLiteral)t.Object));
                            }
                            else {
                                RDFOntologyResource custAnn = ontology.Model.ClassModel.SelectClass(t.Object.ToString());
                                if (custAnn         == null) {
                                    custAnn          = ontology.Model.PropertyModel.SelectProperty(t.Object.ToString());
                                    if (custAnn     == null) {
                                        custAnn      = ontology.Data.SelectFact(t.Object.ToString());
                                        if (custAnn == null) {
                                            custAnn  = new RDFOntologyResource();
                                            custAnn.Value           = t.Object;
                                            custAnn.PatternMemberID = t.Object.PatternMemberID;

                                            //Raise warning event to inform the user: custom annotation on property 
                                            //has been imported from graph, but linking an unknown generic resource
                                            RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("Custom annotation '{0}' on property '{1}' has been imported from graph, but linking an unknown generic resource '{2}'.", annotProps.Current.Value, p.Value, t.Object));

                                        }
                                    }
                                }
                                ontology.Model.PropertyModel.AddCustomAnnotation(p, (RDFOntologyAnnotationProperty)annotProps.Current, custAnn);
                            }

                        }
                    }
                    #endregion

                }
                #endregion

                #region Facts
                foreach (var f in ontology.Data) {

                    #region VersionInfo
                    foreach (var t in versionInfo.SelectTriplesBySubject((RDFResource)f.Value)) {
                        if  (t.TripleFlavor == RDFModelEnums.RDFTripleFlavors.SPL) {
                             ontology.Data.AddVersionInfoAnnotation(f, new RDFOntologyLiteral((RDFLiteral)t.Object));
                        }
                        else {

                            //Raise warning event to inform the user: versioninfo annotation on fact 
                            //cannot be imported from graph, because it does not link a literal
                            RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("VersionInfo annotation on fact '{0}' cannot be imported from graph, because it does not link a literal.", f.Value, t.Object));

                        }
                    }
                    #endregion

                    #region Comment
                    foreach (var t in comment.SelectTriplesBySubject((RDFResource)f.Value)) {
                        if  (t.TripleFlavor == RDFModelEnums.RDFTripleFlavors.SPL) {
                             ontology.Data.AddCommentAnnotation(f, new RDFOntologyLiteral((RDFLiteral)t.Object));
                        }
                        else {

                            //Raise warning event to inform the user: comment annotation on fact 
                            //cannot be imported from graph, because it does not link a literal
                            RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("Comment annotation on fact '{0}' cannot be imported from graph, because it does not link a literal.", f.Value, t.Object));

                        }
                    }
                    #endregion

                    #region Label
                    foreach (var t in label.SelectTriplesBySubject((RDFResource)f.Value)) {
                        if  (t.TripleFlavor == RDFModelEnums.RDFTripleFlavors.SPL) {
                             ontology.Data.AddLabelAnnotation(f, new RDFOntologyLiteral((RDFLiteral)t.Object));
                        }
                        else {

                            //Raise warning event to inform the user: label annotation on fact 
                            //cannot be imported from graph, because it does not link a literal
                            RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("Label annotation on fact '{0}' cannot be imported from graph, because it does not link a literal.", f.Value, t.Object));

                        }
                    }
                    #endregion

                    #region SeeAlso
                    foreach (var t in seeAlso.SelectTriplesBySubject((RDFResource)f.Value)) {
                        if  (t.TripleFlavor  == RDFModelEnums.RDFTripleFlavors.SPL) {
                             ontology.Data.AddSeeAlsoAnnotation(f, new RDFOntologyLiteral((RDFLiteral)t.Object));
                        }
                        else {
                            RDFOntologyResource resource = ontology.Model.ClassModel.SelectClass(t.Object.ToString());
                            if (resource         == null) {
                                resource          = ontology.Model.PropertyModel.SelectProperty(t.Object.ToString());
                                if (resource     == null) {
                                    resource      = ontology.Data.SelectFact(t.Object.ToString());
                                    if (resource == null) {
                                        resource  = new RDFOntologyResource();
                                        resource.Value           = t.Object;
                                        resource.PatternMemberID = t.Object.PatternMemberID;

                                        //Raise warning event to inform the user: seealso annotation on fact 
                                        //has been imported from graph, but linking an unknown generic resource
                                        RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("SeeAlso annotation on fact '{0}' has been imported from graph, but linking an unknown generic resource '{1}'.", f.Value, t.Object));

                                    }
                                }
                            }
                            ontology.Data.AddSeeAlsoAnnotation(f, resource);
                        }
                    }
                    #endregion

                    #region IsDefinedBy
                    foreach (var t in isDefinedBy.SelectTriplesBySubject((RDFResource)f.Value)) {
                        if  (t.TripleFlavor == RDFModelEnums.RDFTripleFlavors.SPL) {
                             ontology.Data.AddIsDefinedByAnnotation(f, new RDFOntologyLiteral((RDFLiteral)t.Object));
                        }
                        else {
                            RDFOntologyResource isDefBy = ontology.Model.ClassModel.SelectClass(t.Object.ToString());
                            if (isDefBy         == null) {
                                isDefBy          = ontology.Model.PropertyModel.SelectProperty(t.Object.ToString());
                                if (isDefBy     == null) {
                                    isDefBy      = ontology.Data.SelectFact(t.Object.ToString());
                                    if (isDefBy == null) {
                                        isDefBy  = new RDFOntologyResource();
                                        isDefBy.Value           = t.Object;
                                        isDefBy.PatternMemberID = t.Object.PatternMemberID;

                                        //Raise warning event to inform the user: isdefinedby annotation on fact 
                                        //has been imported from graph, but linking an unknown generic resource
                                        RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("IsDefinedBy annotation on fact '{0}' has been imported from graph, but linking an unknown generic resource '{1}'.", f.Value, t.Object));

                                    }
                                }
                            }
                            ontology.Data.AddIsDefinedByAnnotation(f, isDefBy);
                        }
                    }
                    #endregion

                    #region CustomAnnotations
                    annotProps       = ontology.Model.PropertyModel.AnnotationPropertiesEnumerator;
                    while (annotProps.MoveNext()) {
                        foreach (var t in ontGraph.SelectTriplesBySubject((RDFResource)f.Value)
                                                  .SelectTriplesByPredicate((RDFResource)annotProps.Current.Value)) {
                            if  (t.TripleFlavor  == RDFModelEnums.RDFTripleFlavors.SPL) {
                                 ontology.Data.AddCustomAnnotation(f, (RDFOntologyAnnotationProperty)annotProps.Current, new RDFOntologyLiteral((RDFLiteral)t.Object));
                            }
                            else {
                                RDFOntologyResource custAnn = ontology.Model.ClassModel.SelectClass(t.Object.ToString());
                                if (custAnn         == null) {
                                    custAnn          = ontology.Model.PropertyModel.SelectProperty(t.Object.ToString());
                                    if (custAnn     == null) {
                                        custAnn      = ontology.Data.SelectFact(t.Object.ToString());
                                        if (custAnn == null) {
                                            custAnn  = new RDFOntologyResource();
                                            custAnn.Value           = t.Object;
                                            custAnn.PatternMemberID = t.Object.PatternMemberID;

                                            //Raise warning event to inform the user: custom annotation on fact 
                                            //has been imported from graph, but linking an unknown generic resource
                                            RDFSemanticsEvents.RaiseSemanticsWarning(String.Format("Custom annotation '{0}' on fact '{1}' has been imported from graph, but linking an unknown generic resource '{2}'.", annotProps.Current.Value, f.Value, t.Object));

                                        }
                                    }
                                }
                                ontology.Data.AddCustomAnnotation(f, (RDFOntologyAnnotationProperty)annotProps.Current, custAnn);
                            }

                        }
                    }
                    #endregion

                }
                #endregion

                #endregion

                #endregion

                #endregion

            }
            return ontology;
        }