Added OWL2 bottom properties to BASE ontology

Author: mdesalvo

RDFSharp/Semantics/OWL/Ontology/RDFOntology.cs

@@ -790,6 +790,8 @@ static RDFBASEOntology()
             Instance.Model.PropertyModel.AddProperty(RDFVocabulary.OWL.PROPERTY_CHAIN_AXIOM.ToRDFOntologyObjectProperty());
             Instance.Model.PropertyModel.AddProperty(RDFVocabulary.OWL.TOP_OBJECT_PROPERTY.ToRDFOntologyObjectProperty());
             Instance.Model.PropertyModel.AddProperty(RDFVocabulary.OWL.TOP_DATA_PROPERTY.ToRDFOntologyDatatypeProperty());
+            Instance.Model.PropertyModel.AddProperty(RDFVocabulary.OWL.BOTTOM_OBJECT_PROPERTY.ToRDFOntologyObjectProperty());
+            Instance.Model.PropertyModel.AddProperty(RDFVocabulary.OWL.BOTTOM_DATA_PROPERTY.ToRDFOntologyDatatypeProperty());
 
             #endregion