---
title: contentIdentifier
framework: storekit
role: symbol
role_heading: Instance Property
path: storekit/skdownload/contentidentifier
---

# contentIdentifier

A string that uniquely identifies the downloadable content.

## Declaration

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

## Discussion

Discussion Each piece of downloadable content associated with a product has its own unique identifier. The content identifier is specified in App Store Connect when you add the content.

## See Also

### Related Documentation

- [In-App Purchase Programming Guide](apple-archive/documentation/NetworkingInternet/Conceptual/StoreKitGuide/Introduction.html.md)

### Getting Content Information

- [expectedContentLength](storekit/skdownload/expectedcontentlength.md)
- [contentVersion](storekit/skdownload/contentversion.md)
- [transaction](storekit/skdownload/transaction.md)
- [contentLength](storekit/skdownload/contentlength.md)