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# referenceRestrictions

The restrictions that an asset places on how it resolves references to external media.

```
var referenceRestrictions: AVAssetReferenceRestrictions { get }
```

## Discussion

For [`AVURLAsset`](/documentation/AVFoundation/AVURLAsset), this property reflects the value passed in for [`AVURLAssetReferenceRestrictionsKey`](/documentation/AVFoundation/AVURLAssetReferenceRestrictionsKey), if any.

The default value for this property is [`defaultPolicy`](/documentation/AVFoundation/AVAssetReferenceRestrictions/defaultPolicy). See [`AVURLAssetReferenceRestrictionsKey`](/documentation/AVFoundation/AVURLAssetReferenceRestrictionsKey) for more information about reference restrictions.

---

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