---
title: isDefined
framework: usdkit
role: symbol
role_heading: Instance Property
platforms: [iOS 27.0+, iPadOS 27.0+, Mac Catalyst 27.0+, macOS 27.0+, tvOS 27.0+, visionOS 27.0+]
path: usdkit/usdtransformoperation/isdefined
---

# isDefined

A Boolean value indicating whether this operation is defined.

## Declaration

```swift
var isDefined: Bool { get }
```