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# NSFontDescriptor.VariationKey

Constants that can be used as keys to retrieve information about a font descriptor from its variation axis dictionary.

```
struct VariationKey
```

## Discussion

These keys are used with [`variation`](/documentation/AppKit/NSFontDescriptor/AttributeName/variation).

## Topics

### Variation Keys

[`static let identifier: NSFontDescriptor.VariationKey`](/documentation/AppKit/NSFontDescriptor/VariationKey/identifier)

The axis identifier value as a number object.

[`static let minimumValue: NSFontDescriptor.VariationKey`](/documentation/AppKit/NSFontDescriptor/VariationKey/minimumValue)

The minimum axis value as a number object.

[`static let maximumValue: NSFontDescriptor.VariationKey`](/documentation/AppKit/NSFontDescriptor/VariationKey/maximumValue)

The maximum axis value as a number object.

[`static let defaultValue: NSFontDescriptor.VariationKey`](/documentation/AppKit/NSFontDescriptor/VariationKey/defaultValue)

The default axis value as a number object.

[`static let name: NSFontDescriptor.VariationKey`](/documentation/AppKit/NSFontDescriptor/VariationKey/name)

The localized variation axis name.

### Initializers

[`init(rawValue: String)`](/documentation/AppKit/NSFontDescriptor/VariationKey/init(rawValue:))

## Relationships

### Conforms To

[`Hashable`](/documentation/Swift/Hashable)

[`Equatable`](/documentation/Swift/Equatable)

[`Sendable`](/documentation/Swift/Sendable)

[`RawRepresentable`](/documentation/Swift/RawRepresentable)

[`SendableMetatype`](/documentation/Swift/SendableMetatype)

---

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