{
  "default": {
    "cat": {
      "baseline": "1.0",
      "port-version": 0
    },
    "dog": {
      "baseline": "2001-01-01",
      "port-version": 0
    },
    "duck": {
      "baseline": "mallard",
      "port-version": 0
    },
    "mouse": {
      "baseline": "1.0.0",
      "port-version": 0
    }
  }
}