<!--
{
  "availability" : [
    "iOS: 3.0.0 -",
    "iPadOS: 3.0.0 -",
    "macCatalyst: 13.1.0 -",
    "macOS: 10.5.0 -",
    "tvOS: -",
    "visionOS: 1.0.0 -",
    "watchOS: 2.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "CoreData",
  "identifier" : "/documentation/CoreData/NSPersistentStore/identifier",
  "metadataVersion" : "0.1.0",
  "role" : "Instance Property",
  "symbol" : {
    "kind" : "Instance Property",
    "modules" : [
      "Core Data"
    ],
    "preciseIdentifier" : "c:objc(cs)NSPersistentStore(py)identifier"
  },
  "title" : "identifier"
}
-->

# identifier

The unique identifier for the persistent store.

```
var identifier: String! { get set }
```

## Discussion

The identifier is used as part of the managed object IDs for each object in the store.

### Special Considerations

`NSPersistentStore` provides a default implementation to provide a globally unique identifier for the store instance.

## See Also

[`metadata`](/documentation/CoreData/NSPersistentStore/metadata)

The metadata for the persistent store.


---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)