code: def _buildTemplates(self):
          
  
          c_mydict = build_class_json(self.ontospy_graph.all_classes)
          JSON_DATA_CLASSES = json.dumps(c_mydict)
  
  
          extra_context = {
                          "ontograph": self.ontospy_graph,
           'JSON_DATA_CLASSES' : JSON_DATA_CLASSES,
                          }
  
          # Ontology - MAIN PAGE
          contents = self._renderTemplate("misc/sigmajs.html", extraContext=extra_context)
          FILE_NAME = "index.html"
          main_url = self._save2File(contents, FILE_NAME, self.output_path)
  
          return main_url
docs: OVERRIDING THIS METHOD from Factory