---
title: id
framework: Assignables
role: symbol
role_heading: Instance Property
platforms: [iOS 17.4+, iPadOS 17.4+, Mac Catalyst 17.4+]
path: assignables/assignabledocument/questionbox/id-swift.property
---

# id

The stable identity of this box.

## Declaration

```swift
var id: AssignableDocument.QuestionBox.ID { get set }
```