---
title: CFError userInfo Dictionary Keys
framework: corefoundation
role: collectionGroup
role_heading: API Collection
path: corefoundation/cferror-userinfo-dictionary-keys
---

# CFError userInfo Dictionary Keys

Keys in the userInfo dictionary of a CFError object when certain CFURL functions return an error.

## Topics

### Constants

- [kCFURLKeysOfUnsetValuesKey](corefoundation/kcfurlkeysofunsetvalueskey.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)
- [File Property Keys](corefoundation/file-property-keys.md)
- [iCloud Constants](corefoundation/icloud-constants.md)
- [Volume Property Keys](corefoundation/volume-property-keys.md)