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# MLActionClassifier.ModelParameters.ValidationData

The source of a validation dataset for an action classifier.

```
enum ValidationData
```

## Topics

### Designating validation data

[`case dataSource(MLActionClassifier.DataSource)`](/documentation/CreateML/MLActionClassifier/ModelParameters-swift.struct/ValidationData/dataSource(_:))

A validation dataset represented by a data source.

[`case split(strategy: MLSplitStrategy)`](/documentation/CreateML/MLActionClassifier/ModelParameters-swift.struct/ValidationData/split(strategy:))

A validation dataset derived by randomly selecting a portion of
the action classifier’s training dataset using the split
strategy.

[`case none`](/documentation/CreateML/MLActionClassifier/ModelParameters-swift.struct/ValidationData/none)

An empty validation dataset that skips the model validation
phase after training.


---

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