---
title: UTTypeApplicationExtension
framework: uniformtypeidentifiers
role: symbol
role_heading: Global Variable
path: uniformtypeidentifiers/uttypeapplicationextension
---

# UTTypeApplicationExtension

A type that represents an app extension.

## Declaration

```occ
extern UTType * const UTTypeApplicationExtension;
```

## Discussion

Discussion The identifier for this type is com.apple.application-and-system-extension. This type conforms to UTTypeXPCService.

## See Also

### Apple system types

- [UTTypeFramework](uniformtypeidentifiers/uttypeframework.md)
- [UTTypeApplicationBundle](uniformtypeidentifiers/uttypeapplicationbundle.md)
- [UTTypeSpotlightImporter](uniformtypeidentifiers/uttypespotlightimporter.md)
- [UTTypeQuickLookGenerator](uniformtypeidentifiers/uttypequicklookgenerator.md)
- [UTTypeXPCService](uniformtypeidentifiers/uttypexpcservice.md)
- [UTTypeSystemPreferencesPane](uniformtypeidentifiers/uttypesystempreferencespane.md)