---
title: Core Foundation Data Types
framework: corefoundation
role: collectionGroup
role_heading: API Collection
path: corefoundation/core-foundation-data-types
---

# Core Foundation Data Types

## Topics

### Data Types

- [CFAllocatorTypeID](corefoundation/cfallocatortypeid.md)
- [CFCalendarIdentifier](corefoundation/cfcalendaridentifier.md)
- [CFDateFormatterKey](corefoundation/cfdateformatterkey.md)
- [CFErrorDomain](corefoundation/cferrordomain.md)
- [CFLocaleIdentifier](corefoundation/cflocaleidentifier.md)
- [CFLocaleKey](corefoundation/cflocalekey.md)
- [CFNotificationName](corefoundation/cfnotificationname.md)
- [CFNumberFormatterKey](corefoundation/cfnumberformatterkey.md)
- [CFRunLoopMode](corefoundation/cfrunloopmode.md)
- [CFStreamPropertyKey](corefoundation/cfstreampropertykey.md)
- [CFTypeRef](corefoundation/cftyperef.md)

## See Also

### Reference

- [CFStream](corefoundation/cfstream.md)
- [Core Foundation Structures](corefoundation/core-foundation-structures.md)
- [Core Foundation Enumerations](corefoundation/core-foundation-enumerations.md)
- [Core Foundation Constants](corefoundation/core-foundation-constants.md)
- [Core Foundation Functions](corefoundation/core-foundation-functions.md)
- [Core Foundation Macros](corefoundation/corefoundation-macros.md)