{
  "type": "object",
  "title": "Room Event",
  "description": "In addition to the Event fields, Room Events may have the following additional fields.",
  "allOf":[{
    "$ref": "event.json"
  }],
  "properties": {
    "event_id": {
      "type": "string",
      "description": "Required. The globally unique event identifier."
    },
    "room_id": {
      "type": "string",
      "description": "Required. The ID of the room associated with this event."
    },
    "sender": {
      "type": "string",
      "description": "Required. Contains the fully-qualified ID of the user who *sent* this event."
    },
    "unsigned": {
      "type": "object",
      "description": "Contains optional extra information about the event.",
      "title": "UnsignedData",
      "properties": {
        "age": {
          "type": "integer",
          "description": "The time in milliseconds that has elapsed since the event was sent"
        },
        "redacted_because": {
          "type": "string",
          "description": "The reason this event was redacted, if it was redacted"
        },
        "transaction_id": {
          "type": "string",
          "description": "The client-supplied transaction ID, if the client being given the event is the same one which sent it."
        }
      }
    }
  },
  "required": ["event_id", "room_id", "sender"]
}