---
title: identifier
framework: appkit
role: symbol
role_heading: Type Property
path: appkit/nsfontdescriptor/variationkey/identifier
---

# identifier

The axis identifier value as a number object.

## Declaration

```swift
static let identifier: NSFontDescriptor.VariationKey
```

## Discussion

Discussion The value of this key is an NSNumber object.

## See Also

### Variation Keys

- [minimumValue](appkit/nsfontdescriptor/variationkey/minimumvalue.md)
- [maximumValue](appkit/nsfontdescriptor/variationkey/maximumvalue.md)
- [defaultValue](appkit/nsfontdescriptor/variationkey/defaultvalue.md)
- [name](appkit/nsfontdescriptor/variationkey/name.md)