code: def val(self):
          
          xml = self._val_tmpl.format(**{
              'nsdecls':       ' %s' % nsdecls('c'),
              'values_ref':    self._series.values_ref,
              'number_format': self._series.number_format,
              'val_count':     len(self._series),
              'val_pt_xml':    self._val_pt_xml,
          })
          return parse_xml(xml)
docs: The ``<c:val>`` XML for this series, as an oxml element.