as\ to

as\ to
1. In connection with; about; regarding.

There is no doubt as to his honesty.

As to your final grade, that depends on your final examination.

Syn.: with respect to
2. According to; following; going by.

They sorted the eggs as to size and color.

Словарь американских идиом. — СПб., Изд-во "Лань". . 1997.