Name	Flags	Card.	Type	Description & Constraints
Ratio	Σ I		Element	A ratio of two Quantity values - a numerator and a denominator + Numerator and denominator SHALL both be present, or both are absent. If both are absent, there SHALL be some extension present Elements defined in Ancestors: id, extension
numerator	Σ	0..1	Quantity	Numerator value
denominator	Σ	0..1	Quantity	Denominator value
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