---
title: registrationDomain
framework: foundation
role: symbol
role_heading: Type Property
path: foundation/userdefaults/registrationdomain
---

# registrationDomain

The identifier for the domain that contains your app’s registered default values.

## Declaration

```swift
class let registrationDomain: String
```

## Mentioned in

Accessing settings from your code

## Discussion

Discussion The settings in this domain represent default values you want to use for its settings. To register your app’s default settings, call the register(defaults:) method shortly after launch.

## See Also

### Getting the domain names

- [argumentDomain](foundation/userdefaults/argumentdomain.md)
- [globalDomain](foundation/userdefaults/globaldomain.md)
- [volatileDomainNames](foundation/userdefaults/volatiledomainnames.md)