{ "name" : "recursiveRecord",
  "namespace" : "org.apache.pig.test.builtin",
  "type" : "record",
  "fields" : [
    {"name" : "key" , "type" : "string"},
    {"name" : "value" , "type" : "string"},
    {"name" : "next" , "type" : [ "org.apache.pig.test.builtin.recursiveRecord" , "null" ]}
  ]
}