---
title: validation
framework: createml
role: symbol
role_heading: Instance Property
path: createml/mlobjectdetector/modelparameters-swift.struct/validation
---

# validation

The object detector’s validation dataset for the training session.

## Declaration

```swift
var validation: MLObjectDetector.ModelParameters.ValidationData
```

## See Also

### Accessing the training parameters

- [batchSize](createml/mlobjectdetector/modelparameters-swift.struct/batchsize.md)
- [maxIterations](createml/mlobjectdetector/modelparameters-swift.struct/maxiterations.md)
- [algorithm](createml/mlobjectdetector/modelparameters-swift.struct/algorithm.md)
- [gridSize](createml/mlobjectdetector/modelparameters-swift.struct/gridsize.md)