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# NSPersistentHistoryChangeRequest

A request to fetch or purge persistent history.

```
class NSPersistentHistoryChangeRequest
```

## Topics

### Configuring the Request

[`fetchRequest`](/documentation/CoreData/NSPersistentHistoryChangeRequest/fetchRequest)

The specified fetch request, when retrieving history.

[`resultType`](/documentation/CoreData/NSPersistentHistoryChangeRequest/resultType)

The type of result that this request returns.

### Getting the Token

[`token`](/documentation/CoreData/NSPersistentHistoryChangeRequest/token)

The specified token, when retrieving history defined by a token.

### Fetching History

[`fetchHistory(after:)`](/documentation/CoreData/NSPersistentHistoryChangeRequest/fetchHistory(after:)-qi5b)

Retrieves history since a given date.

[`fetchHistory(after:)`](/documentation/CoreData/NSPersistentHistoryChangeRequest/fetchHistory(after:)-3rmfm)

Retrieves the request history after a given token.

[`fetchHistory(after:)`](/documentation/CoreData/NSPersistentHistoryChangeRequest/fetchHistory(after:)-9cuj5)

Retrieves history since a given transaction.

[`fetchHistory(withFetch:)`](/documentation/CoreData/NSPersistentHistoryChangeRequest/fetchHistory(withFetch:))

Retrieves history based on a fetch request.

### Purging History

[`deleteHistory(before:)`](/documentation/CoreData/NSPersistentHistoryChangeRequest/deleteHistory(before:)-7t2th)

Purges history older than a given date.

[`deleteHistory(before:)`](/documentation/CoreData/NSPersistentHistoryChangeRequest/deleteHistory(before:)-5kghb)

Purges history older than that defined by a given token.

[`deleteHistory(before:)`](/documentation/CoreData/NSPersistentHistoryChangeRequest/deleteHistory(before:)-9l06p)

Purges history older than a given transaction.


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