{
  "type": "dataset",
  "name": "table_data",
  "selector": "$.nested.nested_2",
  "columns": [
    {
      "name": "id",
      "selector": "$[*]",
      "dataType": "number"
    },
    {
      "name": "value",
      "selector": "$root:$.additionalData[*].val",
      "dataType": "number"
    }
  ]
}