{
  "id": "page-no-duplicate-main",
  "evaluate": "page-no-duplicate-evaluate",
  "after": "page-no-duplicate-after",
  "options": {
    "selector": "main:not([role]), [role='main']"
  },
  "metadata": {
    "impact": "moderate",
    "messages": {
      "pass": "Document does not have more than one main landmark",
      "fail": "Document has more than one main landmark"
    }
  }
}