docs: def parse_value(self):
          """
              Turn the value of an incoming dataset into a hydra-friendly value.
          """
          try:
              if self.value is None:
                  log.warning("Cannot parse dataset. No value specified.")
                  return None
  
              # attr_data.value is a dictionary but the keys have namespaces which must be stripped
              data = six.text_type(self.value)
  
              if data.upper().strip() in ("NULL", ""):
                  return "NULL"
  
              data = data[0:100]
              log.info("[Dataset.parse_value] Parsing %s (%s)", data, type(data))
  
              return HydraObjectFactory.valueFromDataset(self.type, self.value, self.get_metadata_as_dict())
  
          except Exception as e:
              log.exception(e)
              raise HydraError("Error parsing value %s: %s"%(self.value, e))