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# isTransient

A Boolean value that indicates whether the receiver is transient.

```
var isTransient: Bool { get set }
```

## Discussion

<doc://com.apple.documentation/documentation/Swift/true> if the receiver is transient, otherwise <doc://com.apple.documentation/documentation/Swift/false>. The transient flag specifies whether or not a property’s value is ignored when an object is saved to a persistent store. Transient properties are not saved to the persistent store, but are still managed for undo, redo, validation, and so on.

### Special Considerations

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

---

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