---
title: domain
framework: fileprovider
role: symbol
role_heading: Instance Property
path: fileprovider/nsfileproviderextension/domain
---

# domain

The domain managed by this file provider object.

## Declaration

```swift
var domain: NSFileProviderDomain? { get }
```

## Discussion

Discussion If the File Provider extension does not use domains, this property is set to nil. By default, a File Provider extension does not have any domains. A new NSFileProviderExtension object is created for each domain added to the File Provider manager. The new File Provider’s domain property is set to the added domain, and any items returned by the File Provider belong to that domain.