---
title: parameterDescriptionsByKey
framework: coreml
role: symbol
role_heading: Instance Property
path: coreml/mlmodeldescription/parameterdescriptionsbykey
---

# parameterDescriptionsByKey

A dictionary of the descriptions for the model’s parameters.

## Declaration

```swift
var parameterDescriptionsByKey: [MLParameterKey : MLParameterDescription] { get }
```

## See Also

### Accessing update descriptions

- [isUpdatable](coreml/mlmodeldescription/isupdatable.md)
- [trainingInputDescriptionsByName](coreml/mlmodeldescription/traininginputdescriptionsbyname.md)
- [MLParameterDescription](coreml/mlparameterdescription.md)