{
      "id": "http://example.com/base",
      "form": {
        "id": "one",
        "things": [
          {
            "id": "two"
          },
          {
            "id": "#three",
          },
          {
            "id": "four#five",
          },
          {
            "id": "acid:six",
          }
        ]
      }
    }