{
  "id": "landmark-no-duplicate-main",
  "selector": "main:not([role]), [role=main]",
  "tags": ["cat.semantics", "best-practice"],
  "metadata": {
    "description": "Ensures the document has at most one main landmark",
    "help": "Document should not have more than one main landmark"
  },
  "all": [],
  "any": ["page-no-duplicate-main"],
  "none": []
}