{
  "schema": {
    "thoughts": {
      "type": "array",
      "items": {
        "title": "A thought",
        "type": "string"
      }
    }
  },
  "form": [ {
    "type": "array",
    "items": [ {
      "key": "thoughts[]",
      "title": "Thought number {{idx}}"
    } ]
  } ]
}