---
title: revision
framework: vision
role: symbol
role_heading: Instance Property
path: vision/vnrequest/revision
---

# revision

The specific algorithm or implementation revision that’s used to perform the request.

## Declaration

```swift
var revision: Int { get set }
```

## See Also

### Configuring a Request

- [VNRequestCompletionHandler](vision/vnrequestcompletionhandler.md)
- [completionHandler](vision/vnrequest/completionhandler.md)
- [preferBackgroundProcessing](vision/vnrequest/preferbackgroundprocessing.md)
- [results](vision/vnrequest/results.md)
- [usesCPUOnly](vision/vnrequest/usescpuonly.md)