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# destinationEntityVersionHash

The version hash for the destination entity for the entity mapping.

```
var destinationEntityVersionHash: Data? { get set }
```

## Discussion

The version hash is calculated by Core Data based on the property values of the entity (see `NSEntityDescription`’s [`versionHash`](/documentation/CoreData/NSEntityDescription/versionHash) method). The `destinationEntityVersionHash` must equal the version hash of the destination entity represented by the mapping.

## See Also

[`sourceEntityVersionHash`](/documentation/CoreData/NSEntityMapping/sourceEntityVersionHash)

The version hash of the source entity for the entity mapping.


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