{
  "schema": {
    "options": {
      "name": "options",
      "properties": {
        "options.choice1": {
          "name": "options.choice1",
          "properties": {
            "options.choice1.choice1": {
              "name": "options.choice1.choice1",
              "title": "Choice description master",
              "type": "choice",
              "isMulti": true,
              "enum": [
                "choice 1",
                "choice 2"
              ]
            },
            "options.choice1.choice2": {
              "name": "options.choice1.choice2",
              "title": "Choice description slave 1",
              "type": "choice",
              "isMulti": true,
              "enum": [
                "",
                "choice 3",
                "choice 4"
              ]
            },
            "options.choice1.choice3": {
              "name": "options.choice1.choice3",
              "title": "Choice description slave 2",
              "type": "choice",
              "isMulti": true,
              "enum": [
                "",
                "choice 5",
                "choice 6"
              ]
            },
            "options.choice1.choice4": {
              "name": "options.choice1.choice4",
              "title": "Choice description slave 3",
              "type": "choice",
              "isMulti": true,
              "enum": [
                "",
                "choice 7",
                "choice 8"
              ]
            }
          },
          "type": "array",
          "title": "Common configuration 1"
        }
      },
      "type": "object",
      "title": "Common configuration 2"
    }
  },
  "model": [
    {
      "key": "options.choice1.choice1",
      "required": true
    }
  ],
  "form": [
    {
      "type": "choice",
      "key": "options.choice1.choice1"
    },
    {
      "type": "choice",
      "key": "options.choice1.choice2"
    },
    {
      "type": "choice",
      "key": "options.choice1.choice3"
    },
    {
      "type": "choice",
      "key": "options.choice1.choice4"
    },
    {
      "title": "Configurer",
      "type": "submit"
    }
  ]
}