{
  "xzbt": "0.1",
  "meta": {
    "id": "missing-ref-study",
    "name": "Invalid Reference Missing Study"
  },
  "parameters": {
    "activity": {
      "type": "number",
      "default": 0.5
    }
  },
  "bindings": [
    {
      "source": "parameters.non_existent_param",
      "target": "parameters.activity"
    }
  ]
}