"A relationship of two Quantity values - expressed as a numerator and a denominator." - HL7 FHIR, Ratio.
This data type represents a Ratio, where the Low and High Limits are Physical Quantities. A Ratio is " A quantity constructed as the quotient of a numerator quantity divided by a denominator quantity." - HL7 V3 A Physical Quantity is "a dimensioned quantity expressing the result of measuring" - HL7 V3

Attributes
«PQ» Quantity	denominator	"The quantity that devides the numerator in the ratio. The default is the integer number 1 (one). The denominator SHALL not be zero." - HL7 V3 "The value of the denominator." - HL7 FHIR, Ratio.denominator.
«PQ» Quantity	numerator	"The quantity that is being divided in the ratio. The default is the integer number 1 (one)." - HL7 V3 "The value of the numerator." - HL7 FHIR, Ratio.numerator.

 denominator

Public «PQ» Quantity denominator

"The quantity that devides the numerator in the ratio. The default is the integer number 1 (one). The denominator SHALL not be zero." - HL7 V3
"The value of the denominator." - HL7 FHIR, Ratio.denominator.

Constraints:

Properties:

Aggregation	None
Alias
Association
Association End
Class	«RTO_PQ» Ratio
Datatype
Default
Default Value
Is Composite	false
Is Derived	false
Is Derived Union	false
Is Leaf	false
Is Ordered	false
Is Read Only	false
Is Static	false
Is Unique	true
Keywords
Lower	1
Lower Value	(1)
Multiplicity	1
Name	denominator
Name Expression
Namespace	«RTO_PQ» Ratio
Opposite
Owner	«RTO_PQ» Ratio
Owning Association
Owning Template Parameter
Qualified Name	FHIM::Datatypes::Ratio::denominator
Stereotype
Template Parameter
Type	«PQ» Quantity
Upper	1
Upper Value	(1)
Visibility	Public

 numerator

Public «PQ» Quantity numerator

"The quantity that is being divided in the ratio. The default is the integer number 1 (one)." - HL7 V3
"The value of the numerator." - HL7 FHIR, Ratio.numerator.

Constraints:

Properties:

Aggregation	None
Alias
Association
Association End
Class	«RTO_PQ» Ratio
Datatype
Default
Default Value
Is Composite	false
Is Derived	false
Is Derived Union	false
Is Leaf	false
Is Ordered	false
Is Read Only	false
Is Static	false
Is Unique	true
Keywords
Lower	1
Lower Value	(1)
Multiplicity	1
Name	numerator
Name Expression
Namespace	«RTO_PQ» Ratio
Opposite
Owner	«RTO_PQ» Ratio
Owning Association
Owning Template Parameter
Qualified Name	FHIM::Datatypes::Ratio::numerator
Stereotype
Template Parameter
Type	«PQ» Quantity
Upper	1
Upper Value	(1)
Visibility	Public

• A ratio (numerator : denominator) specifying the relative quantities of the Entity playing the Role in the Entity scoping the Role, used for Roles that represent composition relationships between the scoping and playing Entities.