---
title: label
framework: metal
role: symbol
role_heading: Instance Property
path: metal/mtl4pipelinedescriptor/label
---

# label

Assigns an optional string that uniquely identifies a pipeline descriptor.

## Declaration

```swift
var label: String? { get set }
```

## Discussion

Discussion After you provide this label, you can use it to look up a pipeline state object by name in a binary archive.