---
title: HMCharacteristicMetadataFormatBool
framework: homekit
role: symbol
role_heading: Global Variable
path: homekit/hmcharacteristicmetadataformatbool
---

# HMCharacteristicMetadataFormatBool

Indicates that the characteristic has Boolean values.

## Declaration

```swift
let HMCharacteristicMetadataFormatBool: String
```