The address format of the country indicates how an address has to look like for the country.
ISO Code 2 Letter
The ISO code 2 letter identifies the country by two chars as defined in ISO 3166-1 (e.g. US, DE, CH).
ISO Code 3 Letter
The ISO code 3 letter identifies the country by three chars as defined in ISO 3166-1 (e.g. CHE, USA, GBR).
The name labels the country by a name in English.
The numeric code identifies the country by a three digit number as defined in ISO 3166-1 (e.g. 840, 826, 756).
The state codes field is a list of all states associated with this country. The list contains the identifiers of the states. The identifiers corresponds to the ISO 3166-2 subdivision identifier.