{
  "$schema"     : "http://json-schema.org/draft-04/schema#",
  "type"        : "object",
  "title"       : "Card PIN Code",
  "name"        : "pin",
  "rel"         : "pin",
  "description" : "Card PIN code",
  "parent"      : "card",
  "properties": {
    "id": {
      "$ref"        : "../base_types/base_types.json#definitions/id"
    },
    "account_id" : {
      "$ref"        : "../base_types/base_types.json#definitions/account_id"
    },
    "pin" : {
      "description" : "Personal identification number of the card",
      "type"        : "string",
      "pattern"     : "^[0-9]{4}$"
    }
  }
}