+ /* Frontend may make the decision of whether the requested resource is
+ * a feed or not. If it is not able to do so and backend isn't either,
+ * it is an error.
+ */
+ aerr = atom_error_new ();
+ atom_error_code_set (aerr, 404);
+ atom_error_message_set (aerr, "Not Found");
+ atom_error_set (ctx, aerr);