code: def update_meta_info(self):
          
          result = super(BaseStructuredCalibration, self).update_meta_info()
  
          result['instrument'] = self.instrument
          result['uuid'] = self.uuid
          result['tags'] = self.tags
          result['type'] = self.name()
  
          minfo = self.meta_info
          try:
              result['mode'] = minfo['mode_name']
              origin = minfo['origin']
              date_obs = origin['date_obs']
          except KeyError:
              origin = {}
              date_obs = "1970-01-01T00:00:00.00"
  
          result['observation_date'] = conv.convert_date(date_obs)
          result['origin'] = origin
  
          return result
docs: Extract metadata from myself