---
title: qualifier
framework: fskit
role: symbol
role_heading: Instance Property
path: fskit/fsentityidentifier/qualifier
---

# qualifier

An optional piece of data to distinguish entities that otherwise share the same UUID.

## Declaration

```swift
var qualifier: Data? { get set }
```

## See Also

### Inspecting identifier properties

- [uuid](fskit/fsentityidentifier/uuid.md)