{"namespace": "MasteringHadoop.avro",
  "type": "record",
  "name": "City",
  "fields": [
      {"name": "countryCode", "type": "string"},
      {"name": "cityName",  "type": "string"},
      {"name": "cityFullName", "type": "string"},
      {"name": "regionCode", "type": ["int","null"]},
      {"name": "population", "type": ["long", "null"]},
      {"name": "latitude", "type": ["float", "null"]},
      {"name": "longitude", "type": ["float", "null"]}
  ]
 }
 
 {"namespace": "MasteringHadoop.avro",
  "type": "record",
  "name": "Country",
  "fields": [
      {"name": "countryCode", "type": "string"},
      {"name": "countryName",  "type": "string"}
  ]
 }
 
 
