---
title: INMessageAttribute.unknown
framework: intents
role: symbol
role_heading: Case
path: intents/inmessageattribute/unknown
---

# INMessageAttribute.unknown

No known attribute.

## Declaration

```swift
case unknown
```

## See Also

### Constants

- [INMessageAttribute.read](intents/inmessageattribute/read.md)
- [INMessageAttribute.unread](intents/inmessageattribute/unread.md)
- [INMessageAttribute.flagged](intents/inmessageattribute/flagged.md)
- [INMessageAttribute.unflagged](intents/inmessageattribute/unflagged.md)
- [INMessageAttribute.played](intents/inmessageattribute/played.md)