---
title: validationMaximumErrorKey
framework: createml
role: symbol
role_heading: Type Property
path: createml/mlprogress/validationmaximumerrorkey
---

# validationMaximumErrorKey

They key that accesses the validation maximum error value.

## Declaration

```swift
static let validationMaximumErrorKey: ProgressUserInfoKey
```

## See Also

### Accessing error information

- [maximumErrorKey](createml/mlprogress/maximumerrorkey.md)
- [rootMeanSquaredErrorKey](createml/mlprogress/rootmeansquarederrorkey.md)
- [validationRootMeanSquaredErrorKey](createml/mlprogress/validationrootmeansquarederrorkey.md)