description: A homogeneous material with a definite composition. package_name: hl7.fhir.r4b.examples derivation: specialization name: Substance type: Substance elements: identifier: {isModifier: false, short: Unique identifier, type: Identifier, mustSupport: false, array: true, isSummary: true, index: 0} status: isModifier: true short: active | inactive | entered-in-error type: code mustSupport: false binding: {strength: required, valueSet: 'http://hl7.org/fhir/ValueSet/substance-status|4.3.0'} isModifierReason: This element is labelled as a modifier because it is a status element that contains status entered-in-error which means that the resource should not be treated as valid isSummary: true index: 1 category: isModifier: false short: What class/type of substance this is type: CodeableConcept mustSupport: false array: true binding: {strength: extensible, valueSet: 'http://hl7.org/fhir/ValueSet/substance-category'} isSummary: true index: 2 code: isModifier: false short: What substance this is type: CodeableConcept mustSupport: false binding: {strength: example, valueSet: 'http://hl7.org/fhir/ValueSet/substance-code'} isSummary: true index: 3 description: {isModifier: false, short: 'Textual description of the substance, comments', type: string, mustSupport: false, isSummary: true, index: 4} instance: isModifier: false short: If this describes a specific package/container of the substance index: 5 type: BackboneElement mustSupport: false array: true elements: identifier: {isModifier: false, short: Identifier of the package/container, type: Identifier, mustSupport: false, isSummary: true, index: 6} expiry: {isModifier: false, short: When no longer valid to use, type: dateTime, mustSupport: false, isSummary: true, index: 7} quantity: {isModifier: false, short: Amount of substance in the package, type: Quantity, mustSupport: false, isSummary: true, index: 8} meaningWhenMissing: If this element is not present, then the substance resource describes a kind of substance isSummary: true ingredient: isModifier: false short: Composition information about the substance index: 9 type: BackboneElement mustSupport: false array: true elements: quantity: {isModifier: false, short: Optional amount (concentration), type: Ratio, mustSupport: false, isSummary: true, index: 10} substance: isModifier: false short: A component of the substance mustSupport: false choices: [substanceCodeableConcept, substanceReference] isSummary: true index: 12 substanceCodeableConcept: {isModifier: false, short: A component of the substance, type: CodeableConcept, mustSupport: false, choiceOf: substance, isSummary: true, index: 13} substanceReference: isModifier: false short: A component of the substance index: 14 refers: ['http://hl7.org/fhir/StructureDefinition/Substance'] type: Reference mustSupport: false choiceOf: substance isSummary: true required: [substance, substanceReference, substanceCodeableConcept] isSummary: true package_version: 4.3.0 class: resource kind: resource url: http://hl7.org/fhir/StructureDefinition/Substance base: http://hl7.org/fhir/StructureDefinition/DomainResource version: 4.3.0 required: [code]