---
title: MLActivityClassifier.ModelParameters.Validation
framework: Create ML
role: symbol
role_heading: Enumeration
platforms: [macOS 14.0+]
path: createml/mlactivityclassifier/modelparameters-swift.struct/validation-swift.enum
---

# MLActivityClassifier.ModelParameters.Validation

The source of a validation dataset for an activity classifier.

## Declaration

```swift
enum Validation
```

## Topics

### Specifying validation data

- [MLActivityClassifier.ModelParameters.Validation.split(strategy:)](createml/mlactivityclassifier/modelparameters-swift.struct/validation-swift.enum/split(strategy:).md)
- [MLActivityClassifier.ModelParameters.Validation.dataSource(_:)](createml/mlactivityclassifier/modelparameters-swift.struct/validation-swift.enum/datasource(_:).md)
- [MLActivityClassifier.ModelParameters.Validation.none](createml/mlactivityclassifier/modelparameters-swift.struct/validation-swift.enum/none.md)

## See Also

### Creating parameters

- [init(validation:batchSize:maximumIterations:predictionWindowSize:)](createml/mlactivityclassifier/modelparameters-swift.struct/init(validation:batchsize:maximumiterations:predictionwindowsize:).md)
- [init(validationData:batchSize:maximumIterations:predictionWindowSize:)](createml/mlactivityclassifier/modelparameters-swift.struct/init(validationdata:batchsize:maximumiterations:predictionwindowsize:).md)