The country can be an ISO 3166-1 alpha-2 country code

Author: m-mohr

CHANGELOG.md

@@ -8,6 +8,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
+- The country can be an ISO 3166-1 alpha-2 country code
+
 ### Changed
 
 ### Deprecated

README.md

@@ -81,7 +81,7 @@ Physical location at which contact can be made.
 | city               | string    | City for the location. |
 | administrativeArea | string    | State or province of the location. |
 | postalCode         | string    | ZIP or other postal code. |
-| country            | string    | Country of the physical address. |
+| country            | string    | Country of the physical address. Could be a free-form country name or an [ISO 3166-1 alpha-2 country code](https://en.wikipedia.org/wiki/ISO_3166-1_alpha-2#Officially_assigned_code_elements). |
 
 ### Link Object
 

examples/collection.json

@@ -92,7 +92,7 @@
           ],
           "city": "London",
           "postalCode": "E1 7AY",
-          "country": "United Kingdom",
+          "country": "GB",
           "roles": [
             "work"
           ]