{
  "$schema": "http://json-schema.org/draft-04/schema#",
  "definitions": { 
    "IOC-Country-Code": { 
      "enum": [
        "AFG", 
        "AHO",
        "ALB",
        "ALG" 
      ], 
      "type": "string",
      "description": "Three-letter country code of 212 countries and areas, used by the International Olympic Committee (IOC)."
    }
  }
}