---
title: revision
framework: vision
role: symbol
role_heading: Instance Property
path: vision/detectfacerectanglesrequest/revision-swift.property
---

# revision

The algorithm or implementation the request uses.

## Declaration

```swift
let revision: DetectFaceRectanglesRequest.Revision
```

## See Also

### Getting the revision

- [supportedRevisions](vision/detectfacerectanglesrequest/supportedrevisions.md)
- [DetectFaceRectanglesRequest.Revision](vision/detectfacerectanglesrequest/revision-swift.enum.md)