code: def _validate(self, inst: "InstanceNode", scope: ValidationScope,
                    ctype: ContentType) -> None:
          
          if scope.value & ValidationScope.syntax.value:   # schema
              self._check_schema_pattern(inst, ctype)
          for m in inst:
              inst._member(m).validate(scope, ctype)
          super()._validate(inst, scope, ctype)
docs: Extend the superclass method.