openapi.json

{
  "openapi": "3.0.2",
  "info": {
    "title": "test",
    "description": "test",
    "version": "0.1.1"
  },
  "paths": {
    "/": {
      "get": {
        "summary": "test",
        "operationId": "test",
        "parameters": [
          {
            "required": false,
            "schema": {
              "allOf": [
                {
                  "$ref": "#/components/schemas/ArchiveType"
                }
              ],
              "default": "zip"
            },
            "name": "archiveType",
            "in": "query"
          }
        ],
        "responses": {
          "200": {
            "description": "Successful Response",
            "content": {
              "application/json": {
                "schema": {
                }
              }
            }
          }
        }
      }
    }
  },
  "components": {
    "schemas": {
      "ArchiveType": {
        "title": "ArchiveType",
        "enum": [
          "zip",
          "tar",
          "unknown"
        ],
        "type": "string",
        "description": "An enumeration."
      }
    }
  }
}