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.
|id||No||string||Unique id for inter-element referencing|
|extension||No||Extension||Additional content defined by implementations|
|value||No||decimal||Numerical value (with implicit precision)|
|comparator||No||code||< / <= / >= / > - how to understand the value|
|system||No||uri||System that defines coded unit form|
|code||No||code||Coded form of the unit|