---
title: unknown
framework: appkit
role: symbol
role_heading: Type Property
path: appkit/nsaccessibility-swift.struct/rulermarkertypevalue/unknown
---

# unknown

Unknown marker type.

## Declaration

```swift
static let unknown: NSAccessibility.RulerMarkerTypeValue
```

## See Also

### Markers

- [centerTabStop](appkit/nsaccessibility-swift.struct/rulermarkertypevalue/centertabstop.md)
- [decimalTabStop](appkit/nsaccessibility-swift.struct/rulermarkertypevalue/decimaltabstop.md)
- [firstLineIndent](appkit/nsaccessibility-swift.struct/rulermarkertypevalue/firstlineindent.md)
- [headIndent](appkit/nsaccessibility-swift.struct/rulermarkertypevalue/headindent.md)
- [leftTabStop](appkit/nsaccessibility-swift.struct/rulermarkertypevalue/lefttabstop.md)
- [rightTabStop](appkit/nsaccessibility-swift.struct/rulermarkertypevalue/righttabstop.md)
- [tailIndent](appkit/nsaccessibility-swift.struct/rulermarkertypevalue/tailindent.md)