A key that indicates the percent slope of a ski run.
- iOS 11.2+
- watchOS 4.2+
Set this key on quantity samples that represent distance, or on workout segments. Set its value to an
HKQuantity object with a percent unit, where 100% indicates a 45 degree slope.
HealthKit assigns this metadata key to the segments it automatically creates for
HKWorkout workout sessions (Apple Watch Series 3 only).