is about specifies value of located in located_in (type level) located_in has specified value United States of America Geographic Area Postal Code Zip Code [A-Za-z0-9]+([_.\-][A-Za-z0-9]+)*\@[A-Za-z0-9]+([.\-][A-Za-z0-9]+){1,3} A system designed to expedite the sorting and delivery of mail by assigning a series of numbers to each delivery area in the United States. Also used to refer to any individual delivery area code. ZIP /^(:<zip>\d{5}(-\d{4})?)/, $zip Zip Code value specification United States of America