---
title: File Property Keys
framework: corefoundation
role: collectionGroup
role_heading: API Collection
path: corefoundation/file-property-keys
---

# File Property Keys

Keys that apply to properties of files.

## Topics

### Constants

- [kCFURLFileAllocatedSizeKey](corefoundation/kcfurlfileallocatedsizekey.md)
- [kCFURLFileSizeKey](corefoundation/kcfurlfilesizekey.md)
- [kCFURLIsAliasFileKey](corefoundation/kcfurlisaliasfilekey.md)
- [kCFURLIsMountTriggerKey](corefoundation/kcfurlismounttriggerkey.md)
- [kCFURLTotalFileAllocatedSizeKey](corefoundation/kcfurltotalfileallocatedsizekey.md)
- [kCFURLTotalFileSizeKey](corefoundation/kcfurltotalfilesizekey.md)

## See Also

### File System Constants

- [Common File System Resource Keys](corefoundation/common-file-system-resource-keys.md)
- [File Resource Types](corefoundation/file-resource-types.md)
- [iCloud Constants](corefoundation/icloud-constants.md)
- [Volume Property Keys](corefoundation/volume-property-keys.md)
- [CFError userInfo Dictionary Keys](corefoundation/cferror-userinfo-dictionary-keys.md)