---
title: CNKeyDescriptor
framework: contacts
role: symbol
role_heading: Protocol
path: contacts/cnkeydescriptor
---

# CNKeyDescriptor

This protocol is reserved for Contacts framework usage.

## Declaration

```swift
protocol CNKeyDescriptor : NSCopying, NSSecureCoding, NSObjectProtocol
```

## Relationships

### Inherits From

- [NSCoding](foundation/nscoding.md)
- [NSCopying](foundation/nscopying.md)
- [NSObjectProtocol](objectivec/nsobjectprotocol.md)
- [NSSecureCoding](foundation/nssecurecoding.md)

## See Also

### Creating a Fetch Request

- [init(keysToFetch:)](contacts/cncontactfetchrequest/init(keystofetch:).md)