extern const gchar *const measures[n_MEASURES + 1];
gchar *missing_values_to_string (const PsppireDict *dict, const struct variable *pv, GError **err);
extern const gchar *const measures[n_MEASURES + 1];
gchar *missing_values_to_string (const PsppireDict *dict, const struct variable *pv, GError **err);