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# properties

An array containing the properties of the receiver.

```
var properties: [NSPropertyDescription] { get set }
```

## Discussion

The elements in the array are instances of [`NSAttributeDescription`](/documentation/CoreData/NSAttributeDescription), [`NSRelationshipDescription`](/documentation/CoreData/NSRelationshipDescription), and/or [`NSFetchedPropertyDescription`](/documentation/CoreData/NSFetchedPropertyDescription).

### Special Considerations

Setting the properties raises an exception if the receiver’s model has been used by an object graph manager.

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