json_schema: {
      "description": "A MWF explicit component's schema definition.",
      "properties": {
          "content": {
              "properties": {
                  "text": {
                      "enum": [
                          "E",
                          "EXPLICIT"
                      ],
                      "type": "string"
                  }
              },
              "required": [
                  "text"
              ],
              "type": "object"
          }
      },
      "required": [
          "content"
      ],
      "title": "Explicit",
      "type": "object"
  }