/* Is a value system or user missing? */
bool mv_is_value_missing (const struct missing_values *, const union value *);
bool mv_is_num_missing (const struct missing_values *, double);
/* Is a value system or user missing? */
bool mv_is_value_missing (const struct missing_values *, const union value *);
bool mv_is_num_missing (const struct missing_values *, double);