docs: def __extractSkosConcepts(self):
          """
          2015-08-19: first draft
          """
          self.skosConcepts = [] # @todo: keep adding?
  
          qres = self.queryHelper.getSKOSInstances()
  
          for candidate in qres:
  
              test_existing_cl = self.getSkosConcept(uri=candidate[0])
              if not test_existing_cl:
                  # create it
                  self.skosConcepts += [OntoSKOSConcept(candidate[0], None, self.namespaces)]
              else:
                  pass
  
          #add more data
          skos = rdflib.Namespace('http://www.w3.org/2004/02/skos/core#')
  
          for aConcept in self.skosConcepts:
  
              aConcept.rdftype = skos['Concept']
              aConcept.triples = self.queryHelper.entityTriples(aConcept.uri)
              aConcept._buildGraph() # force construction of mini graph
  
              aConcept.queryHelper = self.queryHelper
  
              # attach to an ontology
              for uri in aConcept.getValuesForProperty(rdflib.RDFS.isDefinedBy):
                  onto = self.getOntology(str(uri))
                  if onto:
                      onto.skosConcepts += [aConcept]
                      aConcept.ontology = onto
  
              # add direct Supers
              directSupers = self.queryHelper.getSKOSDirectSupers(aConcept.uri)
  
              for x in directSupers:
                  superclass = self.getSkosConcept(uri=x[0])
                  if superclass:
                      aConcept._parents.append(superclass)
  
                      # add inverse relationships (= direct subs for superclass)
                      if aConcept not in superclass.children():
                           superclass._children.append(aConcept)