extra/cyclic/Master.json

{
  "id": "Master.json",
  "type": "object",
  "datatype": true,
  "category": "fhir",
  "properties": {
    "element": {
      "$ref": "Element.json"
    },
    "extension": {
      "type": "array",
      "items": {
        "$ref": "Extension.json"
      }
    }
  },
  "additionalProperties": false
}