docs: def _parse(self, content):
          """Parses CLAM XML data and returns a ``CLAMData`` object. For internal use. Raises `ParameterError` exception on parameter errors."""
          if content.find('<clam') != -1:
              data = clam.common.data.CLAMData(content,self, loadmetadata=self.loadmetadata)
              if data.errors:
                  error = data.parametererror()
                  if error:
                      raise clam.common.data.ParameterError(error)
              return data
          else:
              return True