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Defines the supported special formats.
public enum Field.SpecialFormat
Phone = 2
A long or short (depending on the number of digits) telephone number, e.g. "(123) 456-7890" or "456-7890".
SSN = 3
A social security number, e.g. "123-45-6789".
ZipCode = 0
A five digit zip code, e.g. "12345".
ZipCode4 = 1
A zip plus-four code, e.g. "12345-6789".