Name	Flags	Card.	Type	Description & Constraints
Substance	TU		DomainResource	A homogeneous material with a definite composition Elements defined in Ancestors: id, meta, implicitRules, language, text, contained, extension, modifierExtension
identifier	Σ	0..*	Identifier	Unique identifier
status	?! Σ	0..1	code	active | inactive | entered-in-error FHIRSubstanceStatus ( Required)
category	Σ	0..*	CodeableConcept	What class/type of substance this is Substance Category Codes ( Extensible)
code	Σ	1..1	CodeableConcept	What substance this is Substance Code ( Example)
description	Σ	0..1	string	Textual description of the substance, comments
instance	Σ	0..*	BackboneElement	If this describes a specific package/container of the substance
identifier	Σ	0..1	Identifier	Identifier of the package/container
expiry	Σ	0..1	dateTime	When no longer valid to use
quantity	Σ	0..1	SimpleQuantity	Amount of substance in the package
ingredient	Σ	0..*	BackboneElement	Composition information about the substance
quantity	Σ	0..1	Ratio	Optional amount (concentration)
substance[x]	Σ	1..1		A component of the substance Substance Code ( Example)
substanceCodeableConcept			CodeableConcept
substanceReference			Reference( Substance)
Documentation for this format