avro-0.4.4.2: test/data/deconflict/reader.avsc

{
  "type": "record",
  "name": "Outer",
  "fields": [
    { "name": "name", "type": "string" },
    { "name": "inner", "type": {
        "type": "record",
        "name": "Inner",
        "fields": [
          { "name": "id", "type": "int" },
          { "name": "smell", "type": ["null", "string"], "default": null }
        ]
      }
    },
    { "name": "other", "type": "Inner" }
  ]
}