{
  "id": "landmark",
  "evaluate": "has-descendant-evaluate",
  "options": {
    "selector": "main, [role=main]"
  },
  "metadata": {
    "impact": "serious",
    "messages": {
      "pass": "Page has a landmark region",
      "fail": "Page does not have a landmark region"
    }
  }
}