loads the RDF/turtle application data to the triplestore

        args:
            reset(bool): True will delete the definition dataset and reload
                    all of the datafiles.

def _load_data(self, reset=False):
        ''' loads the RDF/turtle application data to the triplestore

        args:
            reset(bool): True will delete the definition dataset and reload
                    all of the datafiles.
        '''

        log = logging.getLogger("%s.%s" % (self.log_name,
                                           inspect.stack()[0][3]))
        log.setLevel(self.log_level)
        for attr, obj in self.datafile_obj.items():
            if reset or obj['latest_mod'] > obj['last_json_mod']:
                conn = obj['conn']
                sparql = "DROP ALL;"
                if os.path.isdir(obj['cache_path']):
                    shutil.rmtree(obj['cache_path'], ignore_errors=True)
                os.makedirs(obj['cache_path'])
                drop_extensions = conn.update_query(sparql)
                rdf_resource_templates = []
                rdf_data = []
                for path, files in obj['files'].items():
                    for file in files:
                        file_path = os.path.join(path, file)
                        # data = open(file_path).read()
                        # log.info(" uploading file: %s | namespace: %s",
                        #          file,
                        #          conn.namespace)
                        # data_type = file.split('.')[-1]
                        result = conn.load_data(file_path,
                                                #datatype=data_type,
                                                graph=str(getattr(NSM.kdr,
                                                                  file)),
                                                is_file=True)
                        if result.status_code > 399:
                            raise ValueError("Cannot load '{}' into {}".format(
                                file_name, conn))