---
title: kCGImagePropertyDNGPrivateData
framework: imageio
role: symbol
role_heading: Global Variable
path: imageio/kcgimagepropertydngprivatedata
---

# kCGImagePropertyDNGPrivateData

Private data that manufacturers may store with an image and use in their own converters.

## Declaration

```swift
let kCGImagePropertyDNGPrivateData: CFString
```

## See Also

### Image File Data

- [kCGImagePropertyDNGMakerNoteSafety](imageio/kcgimagepropertydngmakernotesafety.md)
- [kCGImagePropertyDNGRawDataUniqueID](imageio/kcgimagepropertydngrawdatauniqueid.md)
- [kCGImagePropertyDNGSubTileBlockSize](imageio/kcgimagepropertydngsubtileblocksize.md)
- [kCGImagePropertyDNGRowInterleaveFactor](imageio/kcgimagepropertydngrowinterleavefactor.md)
- [kCGImagePropertyDNGBackwardVersion](imageio/kcgimagepropertydngbackwardversion.md)
- [kCGImagePropertyDNGVersion](imageio/kcgimagepropertydngversion.md)