---
title: identifier
framework: uniformtypeidentifiers
role: symbol
role_heading: Instance Property
path: uniformtypeidentifiers/uttype-swift.struct/identifier
---

# identifier

The string that represents the type.

## Declaration

```swift
var identifier: String { get }
```

## Discussion

Discussion The identifier uniquely identifies its type, represented by a reverse-DNS string, such as public.jpeg or com.adobe.pdf. API that doesn’t use UTType uses a String or CFString to refer to a type by its identifier.

## See Also

### Identifying a type

- [UTType.ReferenceType](uniformtypeidentifiers/uttype-swift.struct/referencetype.md)