Quantity

complex type

Base StructureDefinition for Quantity Type: A measured amount (or an amount that can potentially be measured). Note that measured amounts include amounts that are not precisely quantified, including amounts involving arbitrary units and floating currencies.

Official spec

Path	Card.	Type	Description & Constraints
Quantity	0..*	—	A measured or measurable amount
.id	0..1	String	Unique id for inter-element referencing
.extension	0..*	Extension	Additional content defined by implementations
.valueΣ	0..1	decimal	Numerical value (with implicit precision)
.comparator?!Σ	0..1	code	< \| <= \| >= \| > - how to understand the value Bindingquantity-comparator(required)
.unitΣ	0..1	string	Unit representation
.systemΣ	0..1	uri	System that defines coded unit form
.codeΣ	0..1	code	Coded form of the unit