---
title: instanceIdentifier
framework: appintents
role: symbol
role_heading: Instance Property
path: appintents/attributedentityidentifier/instanceidentifier
---

# instanceIdentifier

The string that uniquely identifies this specific entity instance.

## Declaration

```swift
let instanceIdentifier: String
```

## Discussion

Discussion This identifier distinguishes between different instances of the same entity type. It must be unique within the scope of its entity type.