code: def add_ap(self, id_, label=None, addPrefix=True):
          
          self.add_trip(id_, rdf.type, owl.AnnotationProperty)
          if label:
              self.add_trip(id_, rdfs.label, label)
              if addPrefix:
                  prefix = ''.join([s.capitalize() for s in label.split()])
                  namespace = self.expand(id_)
                  self.add_namespace(prefix, namespace)
docs: Add id_ as an owl:AnnotationProperty