---
title: symbologies
framework: vision
role: symbol
role_heading: Instance Property
path: vision/recognizedocumentsrequest/barcodedetectionoptions-swift.struct/symbologies
---

# symbologies

The barcode symbologies that the request detects in an image.

## Declaration

```swift
var symbologies: [BarcodeSymbology]
```

## Discussion

Discussion By default, a request scans for all symbologies. Specify a subset of symbologies to limit the request’s detection range. To see the specific codes recognized refer to supportedBarcodeSymbologies.

## See Also

### Getting the symbology

- [coalesceCompositeSymbologies](vision/recognizedocumentsrequest/barcodedetectionoptions-swift.struct/coalescecompositesymbologies.md)
- [enabled](vision/recognizedocumentsrequest/barcodedetectionoptions-swift.struct/enabled.md)