create a standard data object based on CSV file

def _create_from_owl(self):
        """
        create a standard data object based on CSV file
        """
        self.content['data'] = 'TODO - read OWL from ' + self.input_data
        
        lg.record_process('_create_from_owl', 'read ' + self._calc_size_stats() + ' from ' + self.input_data)