---
title: itemIdentifier
framework: fileprovider
role: symbol
role_heading: Instance Property
path: fileprovider/nsfileprovideritemprotocol/itemidentifier
---

# itemIdentifier

The item’s persistent identifier.

## Declaration

```swift
var itemIdentifier: NSFileProviderItemIdentifier { get }
```

## Mentioned in

Synchronizing the File Provider Extension Using push notifications to signal changes

## See Also

### Providing Required Properties

- [filename](fileprovider/nsfileprovideritemprotocol/filename.md)
- [typeIdentifier](fileprovider/nsfileprovideritemprotocol/typeidentifier.md)
- [contentType](fileprovider/nsfileprovideritemprotocol/contenttype.md)
- [capabilities](fileprovider/nsfileprovideritemprotocol/capabilities.md)