{
  "$comment": "validate references to the whole",
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "node",
  "type": "object",
  "properties": {
    "value": {
      "type": "integer"
    },
    "children": {
      "type": "array",
      "items": {
        "$ref": "#"
      }
    }
  }
}