---
title: kCGImageAuxiliaryDataInfoDataDescription
framework: imageio
role: symbol
role_heading: Global Variable
path: imageio/kcgimageauxiliarydatainfodatadescription
---

# kCGImageAuxiliaryDataInfoDataDescription

A dictionary of keys that describe the auxiliary data.

## Declaration

```swift
let kCGImageAuxiliaryDataInfoDataDescription: CFString
```

## Discussion

Discussion The value of this property is a CFDictionary. The keys in this dictionary may include kCGImagePropertyWidth, kCGImagePropertyHeight, and kCGImagePropertyBytesPerRow.

## See Also

### Auxiliary Image Data

- [kCGImagePropertyAuxiliaryData](imageio/kcgimagepropertyauxiliarydata.md)
- [kCGImagePropertyAuxiliaryDataType](imageio/kcgimagepropertyauxiliarydatatype.md)
- [kCGImageAuxiliaryDataInfoData](imageio/kcgimageauxiliarydatainfodata.md)
- [kCGImageAuxiliaryDataInfoMetadata](imageio/kcgimageauxiliarydatainfometadata.md)