---
title: source
framework: createmlcomponents
role: symbol
role_heading: Type Property
path: createmlcomponents/metricskey/source
---

# source

A key associated with a temporal stream source (e.g. a file name).

## Declaration

```swift
static let source: MetricsKey
```

## See Also

### Getting the properties

- [trainingAccuracy](createmlcomponents/metricskey/trainingaccuracy.md)
- [trainingError](createmlcomponents/metricskey/trainingerror.md)
- [trainingLoss](createmlcomponents/metricskey/trainingloss.md)
- [trainingMaximumError](createmlcomponents/metricskey/trainingmaximumerror.md)
- [trainingMeanAveragePrecision](createmlcomponents/metricskey/trainingmeanaverageprecision.md)
- [validationAccuracy](createmlcomponents/metricskey/validationaccuracy.md)
- [validationError](createmlcomponents/metricskey/validationerror.md)
- [validationLoss](createmlcomponents/metricskey/validationloss.md)
- [validationMaximumError](createmlcomponents/metricskey/validationmaximumerror.md)
- [validationMeanAveragePrecision](createmlcomponents/metricskey/validationmeanaverageprecision.md)