Properties Defined  Constraints  Value 

Properties Constrained  Constraint  Value 

Numerator.Quantity.Units.Coding
Defined in Ratio

Fixed Value
Constrained in Frequency

http://unitsofmeasure.org (code: 1)

Denominator.Quantity.Units.Coding
Defined in Ratio

Value Set
Constrained in Frequency

http://hl7.org/fhir/ValueSet/unitsoftime (REQUIRED)

Numerator
,
Denominator