---
title: key
framework: MediaExtension
role: symbol
role_heading: Instance Property
platforms: [macOS 15.0+]
path: mediaextension/merawprocessingparameter/key
---

# key

A unique key string identifying the parameter.

## Declaration

```swift
var key: String { get }
```

## See Also

### Inspecting a processing parameter

- [enabled](mediaextension/merawprocessingparameter/enabled.md)
- [longDescription](mediaextension/merawprocessingparameter/longdescription.md)
- [name](mediaextension/merawprocessingparameter/name.md)