---
title: prefix
framework: appkit
role: symbol
role_heading: Type Property
path: appkit/nsspeechsynthesizer/speechpropertykey/commanddelimiterkey/prefix
---

# prefix

The command delimiter string that prefixes a command, by default, this is [[.

## Declaration

```swift
static let prefix: NSSpeechSynthesizer.SpeechPropertyKey.CommandDelimiterKey
```

## See Also

### Delimiter Keys

- [suffix](appkit/nsspeechsynthesizer/speechpropertykey/commanddelimiterkey/suffix.md)