Postal code display key attribute of the country XML file

The attribute postalCodeDisplayKey sets the display key to use as the label for the postal code of an address. For example, PolicyCenter uses the following display keys to label the postal code field for the following countries:
Japan
postalCodeDisplayKey="Web.AddressBook.AddressInputSet.Postcode"
United States
postalCodeDisplayKey="Web.AddressBook.AddressInputSet.ZIP"

If a country.xml file does not define postalCodeDisplayKey, PolicyCenter uses the value "Postcode".