---
title: AppAssetLibraryRefDatum.Attributes
framework: App Store Connect API
role: symbol
role_heading: Object
platforms: [app store connect api 4.5+]
path: appstoreconnectapi/appassetlibraryrefdatum/attributes-data.dictionary
---

# AppAssetLibraryRefDatum.Attributes

Attributes that describe an app asset library reference data resource.

## Declaration

```data
object AppAssetLibraryRefDatum.Attributes
```

## Properties

features: The App Store features to which the reference data applies. placementProfileGroups: The groups of placement profiles that define how you can place assets. imageSpecs: The valid specifications for image assets, including dimensions and formats. videoSpecs: The valid specifications for video assets, including dimensions and formats. placementTypes: The placement types available for positioning assets. displayClasses: The display classes that describe the target devices for assets.

## Topics

### Dictionaries

- [AppAssetLibraryRefDatum.Attributes.DisplayClasses](appstoreconnectapi/appassetlibraryrefdatum/attributes-data.dictionary/displayclasses-data.dictionary.md)
- [AppAssetLibraryRefDatum.Attributes.Features](appstoreconnectapi/appassetlibraryrefdatum/attributes-data.dictionary/features-data.dictionary.md)
- [AppAssetLibraryRefDatum.Attributes.ImageSpecs](appstoreconnectapi/appassetlibraryrefdatum/attributes-data.dictionary/imagespecs-data.dictionary.md)
- [AppAssetLibraryRefDatum.Attributes.PlacementProfileGroups](appstoreconnectapi/appassetlibraryrefdatum/attributes-data.dictionary/placementprofilegroups-data.dictionary.md)
- [AppAssetLibraryRefDatum.Attributes.PlacementTypes](appstoreconnectapi/appassetlibraryrefdatum/attributes-data.dictionary/placementtypes-data.dictionary.md)
- [AppAssetLibraryRefDatum.Attributes.VideoSpecs](appstoreconnectapi/appassetlibraryrefdatum/attributes-data.dictionary/videospecs-data.dictionary.md)