---
title: AppExtensionPoint.Identifier
framework: extensionfoundation
role: symbol
role_heading: Structure
path: extensionfoundation/appextensionpoint/identifier
---

# AppExtensionPoint.Identifier

The details of an extension point that your app extension supports.

## Declaration

```swift
struct Identifier
```

## Mentioned in

Building an app extension to support a host app

## Overview

Overview When creating a binding in your app extension, use this type to specify the extension point details. When binding to a host app’s extension point, always initialize this type with the host app’s bundle identifier and extension point name.

## Topics

### Creating an identifier attribute

- [init(_:)](extensionfoundation/appextensionpoint/identifier/init(_:).md)
- [init(host:name:)](extensionfoundation/appextensionpoint/identifier/init(host:name:).md)

## See Also

### Binding to an extension point

- [AppExtensionPoint.Bind](extensionfoundation/appextensionpoint/bind.md)