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# NSQueryGenerationToken

A token that indicates which generation of the persistent store is being accessed.

```
class NSQueryGenerationToken
```

## Overview

When a managed object context is pinned to a specific generation of the app data, a query generation token will be associated with that context.

## Topics

### Identifying Generations of App Data

[`current`](/documentation/CoreData/NSQueryGenerationToken/current)

A token that informs a context to use the current generation.


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