---
title: supplementalCompositeType
framework: vision
role: symbol
role_heading: Instance Property
path: vision/barcodeobservation/supplementalcompositetype
---

# supplementalCompositeType

The supplemental composite type.

## Declaration

```swift
let supplementalCompositeType: BarcodeObservation.CompositeType?
```

## Discussion

Discussion Currently, this can only refer to the composite flag of the 2D symbology as part of a GS1 composite symbology. This attribute only exists when the primary descriptor is the 1D symbology of a GS1 composite symbology, and of which a valid 2D counterpart has been coalesced into.

## See Also

### Getting the composite type

- [BarcodeObservation.CompositeType](vision/barcodeobservation/compositetype.md)