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# NSFontDescriptor.TraitKey

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

```
struct TraitKey
```

## Discussion

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

## Topics

### Trait Keys

[`static let symbolic: NSFontDescriptor.TraitKey`](/documentation/AppKit/NSFontDescriptor/TraitKey/symbolic)

The symbolic traits value as a number object.

[`static let weight: NSFontDescriptor.TraitKey`](/documentation/AppKit/NSFontDescriptor/TraitKey/weight)

The normalized weight value as a number object.

[`static let width: NSFontDescriptor.TraitKey`](/documentation/AppKit/NSFontDescriptor/TraitKey/width)

The relative inter-glyph spacing value as a number object.

[`static let slant: NSFontDescriptor.TraitKey`](/documentation/AppKit/NSFontDescriptor/TraitKey/slant)

The relative slant angle value as a number object.

### Initializers

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

## Relationships

### Conforms To

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

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

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

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

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

---

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