---
title: HKMetadataKeyReferenceRangeUpperLimit
framework: healthkit
role: symbol
role_heading: Global Variable
path: healthkit/hkmetadatakeyreferencerangeupperlimit
---

# HKMetadataKeyReferenceRangeUpperLimit

A key that indicates the upper limit of the reference range for a lab result.

## Declaration

```swift
let HKMetadataKeyReferenceRangeUpperLimit: String
```

## Discussion

Discussion This key takes an NSNumber value.

## See Also

### Lab Keys

- [HKMetadataKeyWasTakenInLab](healthkit/hkmetadatakeywastakeninlab.md)
- [HKMetadataKeyReferenceRangeLowerLimit](healthkit/hkmetadatakeyreferencerangelowerlimit.md)