description: This profile sets minimum expectations for a Substance resource to record, search, and fetch substances associated with a patient. It is based on the [AU Base Substance](http://build.fhir.org/ig/hl7au/au-fhir-base/StructureDefinition-au-substance.html) profile and identifies the *additional* mandatory core elements, extensions, vocabularies and value sets that **SHALL** be present in the Substance when conforming to this profile. It provides the floor for standards development for specific uses cases in an Australian context. \n\nIn AU Core a Substance resource is used within the context of a referencing resource.
package_name: hl7.fhir.au.core
derivation: constraint
name: AUCoreSubstance
type: Substance
elements:
  identifier: {mustSupport: true, index: 0}
  category: {mustSupport: true, index: 1}
  code: {mustSupport: true, index: 2}
  description: {mustSupport: true, index: 3}
package_version: 0.2.2-preview
class: profile
kind: resource
url: http://hl7.org.au/fhir/core/StructureDefinition/au-core-substance
base: http://hl7.org.au/fhir/StructureDefinition/au-substance
version: 0.2.2-preview