---
title: VNDetectBarcodesRequestRevision2
framework: vision
role: symbol
role_heading: Global Variable
path: vision/vndetectbarcodesrequestrevision2
---

# VNDetectBarcodesRequestRevision2

A constant for specifying revision 2 of the barcode detection request.

## Declaration

```swift
var VNDetectBarcodesRequestRevision2: Int { get }
```

## See Also

### Identifying Request Revisions

- [VNDetectBarcodesRequestRevision3](vision/vndetectbarcodesrequestrevision3.md)
- [VNDetectBarcodesRequestRevision1](vision/vndetectbarcodesrequestrevision1.md)