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# AppSchema.BooksEnum

Identifies enum schemas in the books domain.

```
protocol BooksEnum : AppSchema.Kind
```

## Topics

### Instance Properties

[`var contentType: some AppSchemaEnum`](/documentation/AppIntents/AppSchema/BooksEnum/contentType)

An enum schema for a content type parameter.

[`var font: some AppSchemaEnum`](/documentation/AppIntents/AppSchema/BooksEnum/font)

An enum schema for a font parameter.

[`var fontSize: some AppSchemaEnum`](/documentation/AppIntents/AppSchema/BooksEnum/fontSize)

An enum schema for a font size parameter.

[`var navigationDirection: some AppSchemaEnum`](/documentation/AppIntents/AppSchema/BooksEnum/navigationDirection)

An enum schema for a navigation direction parameter.

[`var pageNavigationSetting: some AppSchemaEnum`](/documentation/AppIntents/AppSchema/BooksEnum/pageNavigationSetting)

An enum schema for a page navigation setting parameter.

[`var relativeCharacterSpacingChange: some AppSchemaEnum`](/documentation/AppIntents/AppSchema/BooksEnum/relativeCharacterSpacingChange)

An enum schema for a relative character spacing change parameter.

[`var relativeFontChange: some AppSchemaEnum`](/documentation/AppIntents/AppSchema/BooksEnum/relativeFontChange)

An enum schema for a relative font change parameter.

[`var relativeLineSpacingChange: some AppSchemaEnum`](/documentation/AppIntents/AppSchema/BooksEnum/relativeLineSpacingChange)

An enum schema for a relative line spacing change parameter.

[`var relativeWordSpacingChange: some AppSchemaEnum`](/documentation/AppIntents/AppSchema/BooksEnum/relativeWordSpacingChange)

An enum schema for a relative word spacing change parameter.

[`var theme: some AppSchemaEnum`](/documentation/AppIntents/AppSchema/BooksEnum/theme)

An enum schema for a theme parameter.

## Relationships

### Conforming Types

[`Enum`](/documentation/AppIntents/AppSchema/Enum)

### Inherits From

[`Kind`](/documentation/AppIntents/AppSchema/Kind)

---

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