"Adult" or "Senior" or "Youth" or "Child" or "Infant" Exactly 3 uppercase letters that correspond to a specific airport. The accuracy of this value is not validated by this schema. Exactly 2 uppercase letters that correspond to a specific country. The accuracy of this value is not validated by this schema. Can only contain 3 or 4 digits. Must be in MM/YY format. "AX" (American Express) or "CA" (MasterCard) or "VI" (Visa) or "DS" (Discover) The only acceptable format is YYYY-MM-DD. "Miles" or "Kilometers" Must be in format: ++1-602-2626151 or ++1-602-2626151x1234567 or ++42--1234567890, where 2 plus (+) signs and 2 dash (-) signs must be present in the order given in examples. Extension is optional, and it must begin with lowecase x. "Smoking" or "NonSmoking" or "Either" Must contain at least one character and it cannot include a line break.