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

# revision

The algorithm or implementation the request uses.

## Declaration

```swift
let revision: RecognizeAnimalsRequest.Revision
```

## See Also

### Getting the revision

- [supportedRevisions](vision/recognizeanimalsrequest/supportedrevisions.md)
- [RecognizeAnimalsRequest.Revision](vision/recognizeanimalsrequest/revision-swift.enum.md)