---
title: unknown
framework: healthkit
role: symbol
role_heading: Type Property
path: healthkit/hkfhirrelease/unknown
---

# unknown

An unknown release.

## Declaration

```swift
static let unknown: HKFHIRRelease
```

## See Also

### Releases

- [dstu2](healthkit/hkfhirrelease/dstu2.md)
- [r4](healthkit/hkfhirrelease/r4.md)