---
title: Property Keys
framework: foundation
role: collectionGroup
role_heading: API Collection
path: foundation/property-keys
---

# Property Keys

These keys correspond to the extension item properties and are specified in the extension’s Info.plist.

## Topics

### Constants

- [NSExtensionItemAttributedTitleKey](foundation/nsextensionitemattributedtitlekey.md)
- [NSExtensionItemAttributedContentTextKey](foundation/nsextensionitemattributedcontenttextkey.md)
- [NSExtensionItemAttachmentsKey](foundation/nsextensionitemattachmentskey.md)

## See Also

### Constants

- [UTI Subtypes for Data Detector Types](foundation/uti-subtypes-for-data-detector-types.md)