code: def p_pkg_chksum_1(self, p):
          
          try:
              if six.PY2:
                  value = p[2].decode(encoding='utf-8')
              else:
                  value = p[2]
              self.builder.set_pkg_chk_sum(self.document, value)
          except OrderError:
              self.order_error('PackageChecksum', 'PackageFileName', p.lineno(1))
          except CardinalityError:
              self.more_than_one_error('PackageChecksum', p.lineno(1))
docs: pkg_chksum : PKG_CHKSUM CHKSUM