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# validation

A dataset the hand action classifier task uses to evaluate the model
that’s distinct from the training dataset.

```
var validation: MLHandActionClassifier.ModelParameters.ValidationData
```

## Discussion

The task produces [`validationMetrics`](/documentation/CreateML/MLHandActionClassifier/validationMetrics) by
evaluating the model with the
[`validation`](/documentation/CreateML/MLHandActionClassifier/ModelParameters-swift.struct/validation)
dataset.

---

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