Problem/Motivation

There are many scenarios in which the postal code validation return ambiguous error messages. It might be useful to provide some additional context through a valid example. Google provides a list of valid postal code examples under the zipex property. As a first step to improve postal code validation, we would need to include this property in the addressing resources.

Example

What's involved:

• Update generate_address_data.php to include zipex on both country and subdivision level
• Add property postalCodeExample to AddressFormat class
• ?

Related: #31