{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "#/components/schemas/CategoryTree",
  "title": "CategoryTree",
  "allOf": [
    {
      "$ref": "#/components/schemas/Category"
    },
    {
      "type": "object",
      "properties": {
        "children_data": {
          "type": "array",
          "description": "Nested child category objects forming the category tree.",
          "items": {
            "$ref": "#/components/schemas/CategoryTree"
          }
        }
      }
    }
  ]
}