###  Release 2.0.0-draft
- Publication date: 2025-06-16
- Publication status: Draft
- Based on FHIR version: 4.0.1

This change log documents the significant updates and resolutions implemented from version [1.0.0](https://hl7.org.au/fhir/core/1.0.0/index.html) to 2.0.0-draft.

#### Changes in this version
- updated AUCDI mapping Date of assertion to be MedicationStatement.dateAsserted [FHIR-49960](https://jira.hl7.org/browse/FHIR-49960).
- [AU Core AllergyIntolerance](StructureDefinition-au-core-allergyintolerance.html):
  - added Must Support to AllergyIntolerance.note [FHIR-46940](https://jira.hl7.org/browse/FHIR-46940)
- [AU Core Diagnostic Result Observation](StructureDefinition-au-core-diagnosticresult.html): 
  - clarified that this profile is for specialist and other (non imaging or pathology) results, and added profile-specific implementation guidance to see AU Core Pathology Result Observation profile for pathology results [FHIR-46889](https://jira.hl7.org/browse/FHIR-46889).
- [AU Core Encounter](StructureDefinition-au-core-encounter.html)
  - changed Encounter.reasonCode binding to Reason for Encounter (preferred) [AU Base: FHIR-50996](https://jira.hl7.org/browse/FHIR-50996)
- [AU Core HealthcareService](StructureDefinition-au-core-healthcareservice.html):
  - added new profile, including interaction support to the AU Core CapabilityStatements [FHIR-49934](https://jira.hl7.org/browse/FHIR-49934), [FHIR-50406](https://jira.hl7.org/browse/FHIR-50406), [FHIR-50405](https://jira.hl7.org/browse/FHIR-50405), [AU Base: FHIR-46322](https://jira.hl7.org/browse/FHIR-46322).
- [AU Core Immunization](StructureDefinition-au-core-immunization.html):
  - added Must Support to Immunization.lotNumber [FHIR-47331](https://jira.hl7.org/browse/FHIR-47331)
  - changed Immunization.extension to add Vaccine Vial Serial Number (not marked as *Must Support*) [AU Base: FHIR-46317](https://jira.hl7.org/browse/FHIR-46317)
- [AU Core MedicationRequest](StructureDefinition-au-core-medicationrequest.html):
  - added Must Support to MedicationRequest.dosageInstruction.text [FHIR-50101](https://jira.hl7.org/browse/FHIR-50101)
  - removed duplication of obligation flag added by error to MedicationRequest.medicationReference [FHIR-50800](https://jira.hl7.org/browse/FHIR-50800)
  - applied technical correction to add Must Support and obligation flag to slices medicationCodeableConcept and medicationReference on MedicationRequest.medication[x] to align with Must Support on the sliced element [FHIR-51083](https://jira.hl7.org/browse/FHIR-51083) 
- [AU Core MedicationStatement](StructureDefinition-au-core-medicationstatement.html):
  - added the new profile, including interaction support and adding the DiagnosticReport resource to AU Core CapabilityStatements [FHIR-45091](https://jira.hl7.org/browse/FHIR-45091), [FHIR-49954](https://jira.hl7.org/browse/FHIR-49954), [FHIR-49955](https://jira.hl7.org/browse/FHIR-49955), [FHIR-49956](https://jira.hl7.org/browse/FHIR-49956), [FHIR-49957](https://jira.hl7.org/browse/FHIR-49957), [FHIR-49958](https://jira.hl7.org/browse/FHIR-49958), [FHIR-49959](https://jira.hl7.org/browse/FHIR-49959).
  - added Must Support to MedicationStatement.dosage.text [FHIR-50101](https://jira.hl7.org/browse/FHIR-50101)
  - applied technical correction to add Must Support and obligation flag to slices medicationCodeableConcept and medicationReference on MedicationStatement.medication[x] to align with Must Support on the sliced element [FHIR-51083](https://jira.hl7.org/browse/FHIR-51083)
- [AU Core Pathology Result Observation](StructureDefinition-au-core-diagnosticresult-path.html): 
  - added profile-specific implementation guidance to see AU Core Diagnostic Result Observation profile for non imaging or pathology results  [FHIR-46889](https://jira.hl7.org/browse/FHIR-46889)
  - changed Observation.effective[x] type to remove type constraint [AU Base: FHIR-49189](https://jira.hl7.org/browse/FHIR-49189)
  - applied technical correction to add Must Support and obligation flag to slices lab and specificDiscipline on Observation.category to align with Must Support on the sliced element [FHIR-51083](https://jira.hl7.org/browse/FHIR-51083) 
- [AU Core Patient](StructureDefinition-au-core-patient.html): 
  - removed the cardinality constraint on AU Medicare Card Number identifier, changing it from 0..1 to 0..*  [FHIR-46268](https://jira.hl7.org/browse/FHIR-46268)
  - added AU Patient Internal Identifier to the Patient.identifier list of allowed types [AU Base: FHIR-48671](https://jira.hl7.org/browse/FHIR-48671)
  - added Must Support on Patient.telecom.system [FHIR-51033](https://jira.hl7.org/browse/FHIR-51033)
  - added Must Support on Patient.telecom.value [FHIR-51033](https://jira.hl7.org/browse/FHIR-51033)
  - added Must Support on Patient.telecom.use [FHIR-51033](https://jira.hl7.org/browse/FHIR-51033)
- [AU Core RelatedPerson](StructureDefinition-au-core-relatedperson.html):
  - added the new profile, including interaction support and replacing references to AU Base Related Person with AU Core RelatedPerson [FHIR-49745](https://jira.hl7.org/browse/FHIR-49745), [FHIR-49746](https://jira.hl7.org/browse/FHIR-49746), [FHIR-44600](https://jira.hl7.org/browse/FHIR-44600), [FHIR-49747](https://jira.hl7.org/browse/FHIR-49747).
- [AU Core Smoking Status](StructureDefinition-au-core-smokingstatus.html): 
  - applied technical correction to add Must Support and obligation flag to slice socialHistory on Observation.category to align with Must Support on the sliced element [FHIR-51083](https://jira.hl7.org/browse/FHIR-51083) 

### Release 1.0.0
- Publication date: 2025-01-29
- Publication status: Working Standard (Trial Use)
- Based on FHIR version: 4.0.1

This change log documents the significant updates and resolutions implemented from version [1.0.0-ballot](https://hl7.org.au/fhir/core/1.0.0-ballot/index.html) to [1.0.0](https://hl7.org.au/fhir/core/1.0.0/index.html).

#### Changes in this version
- Added [Sex and Gender](https://hl7.org.au/fhir/core/1.0.0/sex-and-gender.html) page to consolidate implementation guidance on sex and gender concepts in AU Core. Duplicate guidance already defined in AU Base is removed, and replaced with reference to AU Base guidance [FHIR-47176](https://jira.hl7.org/browse/FHIR-47176), [FHIR-47178](https://jira.hl7.org/browse/FHIR-47178), [FHIR-47182](https://jira.hl7.org/browse/FHIR-47182), [FHIR-47183](https://jira.hl7.org/browse/FHIR-47183), [FHIR-46892](https://jira.hl7.org/browse/FHIR-46892), [FHIR-46896](https://jira.hl7.org/browse/FHIR-46896).
- [AU Core Diagnostic Result Observation](https://hl7.org.au/fhir/core/1.0.0/StructureDefinition-au-core-diagnosticresult.html):
  - corrected base profile to AU Base Diagnostic Observation [FHIR-47116](https://jira.hl7.org/browse/FHIR-47116)
  - removed constraints from Observation.hasMember.reference [FHIR-46728](https://jira.hl7.org/browse/FHIR-46728), [FHIR-48331](https://jira.hl7.org/browse/FHIR-48331)
  - removed Must Support and Obligations from Observation.identifier, Observation.interpretation, Observation.note, Observation.method, Observation.referenceRange, Observation.referenceRange.low, Observation.referenceRange.high, Observation.referenceRange.type and Observation.referenceRange.text [FHIR-46737](https://jira.hl7.org/browse/FHIR-46737)
- [AU Core Location](https://hl7.org.au/fhir/core/1.0.0/StructureDefinition-au-core-location.html): removed Must Support flag and associated Obligation extensions from Location.identifier [FHIR-47105](https://jira.hl7.org/browse/FHIR-47105) and Location.mode [FHIR-47104](https://jira.hl7.org/browse/FHIR-47104)
- [AU Core MedicationRequest](https://hl7.org.au/fhir/core/1.0.0/StructureDefinition-au-core-medicationrequest.html): updated invariant au-core-medreq-01 to allow for a Data Absent Reason extension in order to meet AU Core Missing Data and Suppressed Data requirements [FHIR-46417](https://jira.hl7.org/browse/FHIR-46417)
- [AU Core Pathology Result Observation](https://hl7.org.au/fhir/core/1.0.0/StructureDefinition-au-core-diagnosticresult-path.html):
  - removed constraints from Observation.hasMember.reference and Observation.specimen.reference [FHIR-46728](https://jira.hl7.org/browse/FHIR-46728), [FHIR-46731](https://jira.hl7.org/browse/FHIR-46731)
  - removed Must Support and Obligations from Observation.identifier, Observation.method and Observation.note [FHIR-46732](https://jira.hl7.org/browse/FHIR-46732)
- AU Core search parameters and search parameter combinations:
  - [Observation search parameters](https://hl7.org.au/fhir/core/1.0.0/StructureDefinition-au-core-bloodpressure.html#notes): changed 'patient' from SHALL to MAY [FHIR-47171](https://jira.hl7.org/browse/FHIR-47171)
  - [Patient search parameters](https://hl7.org.au/fhir/core/1.0.0/StructureDefinition-au-core-patient.html#notes): removed the requirement for including an offset for 'birthdate' [FHIR-47150](https://jira.hl7.org/browse/FHIR-47150)
  - [Organization search parameters](https://hl7.org.au/fhir/core/1.0.0/StructureDefinition-au-core-organization.html#notes): changed 'name' search parameter from SHOULD to SHALL [FHIR-47109](https://jira.hl7.org/browse/FHIR-47109)
  - [Location search parameters](https://hl7.org.au/fhir/core/1.0.0/StructureDefinition-au-core-location.html#notes): 
    - changed 'address' search parameter from SHALL to SHOULD [FHIR-47107](https://jira.hl7.org/browse/FHIR-47107)
    - removed 'identifier' [FHIR-48927](https://jira.hl7.org/browse/FHIR-48927)
  - [PractitionerRole search parameters](https://hl7.org.au/fhir/core/1.0.0/StructureDefinition-au-core-practitionerrole.html#notes): added 'role' as a SHOULD [FHIR-47115](https://jira.hl7.org/browse/FHIR-47115)
  - [MedicationRequest search parameters](https://hl7.org.au/fhir/core/1.0.0/StructureDefinition-au-core-medicationrequest.html#notes): changed 'patient+intent' and 'patient+intent+status' from SHALL to SHOULD, and added a new MedicationRequest search parameter 'patient+status' as a SHALL [FHIR-47073](https://jira.hl7.org/browse/FHIR-47073)
  - updated requirement to mandate both system and code values for identifier search parameters on Organization, Practitioner and PractitionerRole [FHIR-46782](https://jira.hl7.org/browse/FHIR-46782)
- [AU Core Requester CapabilityStatement](https://hl7.org.au/fhir/core/1.0.0/CapabilityStatement-au-core-requester.html):
  - removed all instances of MAY support create, update, delete, vread, patch, history-instance [FHIR-46060](https://jira.hl7.org/browse/FHIR-46060)
  - removed MAY support search-system and history-system [FHIR-46059](https://jira.hl7.org/browse/FHIR-46059)
  - _id Patient search parameter changed to SHOULD from SHALL [FHIR-46390](https://jira.hl7.org/browse/FHIR-46390)
  - added missing entries for DocumentReference and RelatedPerson resources [FHIR-46546](https://jira.hl7.org/browse/FHIR-46546)
- [AU Core Responder CapabilityStatement](https://hl7.org.au/fhir/core/1.0.0/CapabilityStatement-au-core-responder.html):
  - removed all instances of MAY support create, update, delete, vread, patch, history-instance [FHIR-46060](https://jira.hl7.org/browse/FHIR-46060)
  - corrected narrative of PractitionerRole practitioner.identifier search parameter from Medicare Provider Number to HPI-I [FHIR-47013](https://jira.hl7.org/browse/FHIR-47013)
  - corrected support for Practitioner _id search parameter to SHOULD instead of SHALL [FHIR-46777](https://jira.hl7.org/browse/FHIR-46777)
  - added missing entries for DocumentReference and RelatedPerson resources [FHIR-46546](https://jira.hl7.org/browse/FHIR-46546)

###  Release 1.0.0-ballot
- Publication date: 2024-08-05
- Publication status: Ballot
- Based on FHIR version: 4.0.1

This change log documents the significant updates and resolutions implemented from version [0.3.0-ballot](https://hl7.org.au/fhir/core/0.3.0-ballot/index.html) to [1.0.0-ballot](https://hl7.org.au/fhir/core/1.0.0-ballot/index.html).

#### Changes in this version
- In the [AU Core Data for Interoperability](https://hl7.org.au/fhir/core/1.0.0-ballot/aucdi.html) page, to align to the published AUCDI Release 1 (R1): 
  - added AUCDI element mapping Date/Time of Measurement and Date/Time of Observation, and added future consideration note for Last Updated
  - updated mapping of AUCDI Procedure Completed Event to be represented by Procedure only [au-fhir-core #147](https://github.com/hl7au/au-fhir-core/issues/147).
  - updated mapping of AUCDI Medication Use Statement to be represented by MedicationStatement only [au-fhir-core #145](https://github.com/hl7au/au-fhir-core/issues/145).
- dependency to Smart App Launch changed to 2.1.0 instead of latest (2.2.0) due to missing dependency issue that causes failure to load in NPM Package registry [FHIR-46398](https://jira.hl7.org/browse/FHIR-46398)
- Throughout the specification made significant clarifications to FHIR Obligations, Actors, and Capabilities:
  - changed the default obligation behaviour in AU Core for Responders from 'be capable of populate' to 'populate if known' [FHIR-45231](https://jira.hl7.org/browse/FHIR-45231), [FHIR-45195](https://jira.hl7.org/browse/FHIR-45195), [FHIR-45163](https://jira.hl7.org/browse/FHIR-45163), [FHIR-45095](https://jira.hl7.org/browse/FHIR-45095), [FHIR-45073](https://jira.hl7.org/browse/FHIR-45073)
  - introduced FHIR Obligations & ActorDefinitions to clarify system actors and associated obligations [FHIR-45231](https://jira.hl7.org/browse/FHIR-45231), [FHIR-45195](https://jira.hl7.org/browse/FHIR-45195), [FHIR-45163](https://jira.hl7.org/browse/FHIR-45163), [FHIR-45073](https://jira.hl7.org/browse/FHIR-45073)
  - clarified the documentation on Must Support and Mandatory elements using the language of Obligation [FHIR-45231](https://jira.hl7.org/browse/FHIR-45231), [FHIR-45195](https://jira.hl7.org/browse/FHIR-45195), [FHIR-45163](https://jira.hl7.org/browse/FHIR-45163), [FHIR-45073](https://jira.hl7.org/browse/FHIR-45073), [FHIR-43852](https://jira.hl7.org/browse/FHIR-43852)
  - clarified capabilities in AU Core R1 by:
    - renamed AU Core Server to AU Core Responder [FHIR-45231](https://jira.hl7.org/browse/FHIR-45231), [FHIR-45195](https://jira.hl7.org/browse/FHIR-45195), [FHIR-45163](https://jira.hl7.org/browse/FHIR-45163), [FHIR-45073](https://jira.hl7.org/browse/FHIR-45073), [FHIR-43852](https://jira.hl7.org/browse/FHIR-43852)
    - renamed AU Core Client to AU Core Requester [FHIR-45231](https://jira.hl7.org/browse/FHIR-45231), [FHIR-45195](https://jira.hl7.org/browse/FHIR-45195), [FHIR-45163](https://jira.hl7.org/browse/FHIR-45163), [FHIR-45073](https://jira.hl7.org/browse/FHIR-45073), [FHIR-43852](https://jira.hl7.org/browse/FHIR-43852)
  - added [Actor Definitions](https://hl7.org.au/fhir/core/1.0.0-ballot/actors.html) page under FHIR Artefacts [FHIR-45231](https://jira.hl7.org/browse/FHIR-45231), [FHIR-45195](https://jira.hl7.org/browse/FHIR-45195), [FHIR-45163](https://jira.hl7.org/browse/FHIR-45163), [FHIR-45073](https://jira.hl7.org/browse/FHIR-45073).
- Added [Security and Privacy](https://hl7.org.au/fhir/core/1.0.0-ballot/security.html) page [FHIR-45067](https://jira.hl7.org/browse/FHIR-45067), and added requirements on supporting TLS 1.2 and TLS 1.3 [FHIR-46068](https://jira.hl7.org/browse/FHIR-46068).
- Added [AU Variance Statement](https://hl7.org.au/fhir/core/1.0.0-ballot/variance.html) page [FHIR-46034](https://jira.hl7.org/browse/FHIR-46034).
- Added additional guidance for body site / laterality implementation to [General Guidance](https://hl7.org.au/fhir/core/1.0.0-ballot/general-guidance.html) page [FHIR-45176](https://jira.hl7.org/browse/FHIR-45176).
- Moved the Medicine Information section from the General Guidance page to a new [Medicine Information](https://hl7.org.au/fhir/core/1.0.0-ballot/medicine-information.html) page [FHIR-45165](https://jira.hl7.org/browse/FHIR-45165).
- Changes to the following AU Core search parameters and search parameter combinations:
  - clarified multipleAnd comparator support for AU Core date search parameters [FHIR-46309](https://jira.hl7.org/browse/FHIR-46309)
  - [Encounter search parameters](https://hl7.org.au/fhir/core/1.0.0-ballot/StructureDefinition-au-core-encounter.html#notes): removed discharge-disposition, identifier, type, patient+discharge-disposition, patient+type [FHIR-45954](https://jira.hl7.org/browse/FHIR-45954), [FHIR-45603](https://jira.hl7.org/browse/FHIR-45603), [FHIR-46057](https://jira.hl7.org/browse/FHIR-46057)
  - [MedicationRequest search parameters](https://hl7.org.au/fhir/core/1.0.0-ballot/StructureDefinition-au-core-medicationrequest.html#notes): removed identifier and category [FHIR-45991](https://jira.hl7.org/browse/FHIR-45991)
  - [Patient search parameters](https://hl7.org.au/fhir/core/1.0.0-ballot/StructureDefinition-au-core-patient.html#notes): 
    - birthdate search parameter support for comparators gt, le, lt, ge to SHOULD from SHALL and multipleAnd support introduced as SHOULD [FHIR-45410](https://jira.hl7.org/browse/FHIR-45410)
    - corrected the search parameter for gender identity to `gender-identity` not `patient-gender-identity` [FHIR-45057](https://jira.hl7.org/browse/FHIR-45057).
  - [Organization search parameters](https://hl7.org.au/fhir/core/1.0.0-ballot/StructureDefinition-au-core-organization.html#notes):
    - address search parameter to SHOULD instead of SHALL [FHIR-45133](https://jira.hl7.org/browse/FHIR-45133)
    - name search parameter to SHOULD instead of SHALL [FHIR-45133](https://jira.hl7.org/browse/FHIR-45133)
- Changes to [AU Core Immunization](https://hl7.org.au/fhir/core/1.0.0-ballot/StructureDefinition-au-core-immunization.html):
  - removed Must Support from Immunization.encounter [FHIR-45218](https://jira.hl7.org/browse/FHIR-45218)
  - removed Must Support from Immunization.performer, Immunization.performer.function, Immunization.performer.actor [FHIR-44653](https://jira.hl7.org/browse/FHIR-44653)
  - removed Must Support from Immunization.protocolApplied, Immunization.protocolApplied.series, Immunization.protocolApplied.targetDisease, Immunization.protocolApplied.doseNumber[x] [FHIR-44674](https://jira.hl7.org/browse/FHIR-44674), [FHIR-44656](https://jira.hl7.org/browse/FHIR-44656), [FHIR-44654](https://jira.hl7.org/browse/FHIR-44654)
  - removed Must Support from Immunization.reasonCode [FHIR-44654](https://jira.hl7.org/browse/FHIR-44654), [FHIR-45968](https://jira.hl7.org/browse/FHIR-45968)
  - added Must Support to Immunization.primarySource [FHIR-44659](https://jira.hl7.org/browse/FHIR-44659)
  - changed Immunization.vaccineCode slicing rule from slicing by system to slice by value set [FHIR-46391](https://jira.hl7.org/browse/FHIR-46391)
  - support for AIR codes and AMT Vaccine codes in Immunization.vaccineCode changed to define the slices in AU Core (no longer inherited from AU Base as per [FHIR-44821](https://jira.hl7.org/browse/FHIR-44821)). Slicing discriminator changed from slicing by value:system to slicing by value set and AMT value set binding strength has been corrected to required. [FHIR-46391](https://jira.hl7.org/browse/FHIR-46391)
- Changes to [AU Core Encounter](https://hl7.org.au/fhir/core/1.0.0-ballot/StructureDefinition-au-core-encounter.html):
  - removed Must Support from Encounter.identifier [FHIR-45212](https://jira.hl7.org/browse/FHIR-45212)
  - removed Must Support from Encounter.type [FHIR-44580](https://jira.hl7.org/browse/FHIR-44580)
  - removed Must Support from Encounter.hospitalization, Encounter.hospitalization.dischargeDisposition [FHIR-45210](https://jira.hl7.org/browse/FHIR-45210)
  - changed Encounter.participant.individual type from RelatedPerson to AU Base RelatedPerson [FHIR-45228](https://jira.hl7.org/browse/FHIR-45228)
- Changes to [AU Core Location](https://hl7.org.au/fhir/core/1.0.0-ballot/StructureDefinition-au-core-location.html): removed Must Support from Location.description in [FHIR-45029](https://jira.hl7.org/browse/FHIR-45029).
- Changes to [AU Core MedicationRequest](https://hl7.org.au/fhir/core/1.0.0-ballot/StructureDefinition-au-core-medicationrequest.html):
  - changed MedicationRequest.requester type from RelatedPerson to AU Base RelatedPerson [FHIR-45228](https://jira.hl7.org/browse/FHIR-45228)
  - removed Must Support from MedicationRequest.identifier [FHIR-45208](https://jira.hl7.org/browse/FHIR-45208)
  - removed Must Support from MedicationRequest.category [FHIR-45207](https://jira.hl7.org/browse/FHIR-45207)
  - removed Must Support from MedicationRequest.note [FHIR-45209](https://jira.hl7.org/browse/FHIR-45209)
  - removed Must Support from MedicationRequest.dispenseRequest, MedicationRequest.dispenseRequest.validityPeriod, MedicationRequest.dispenseRequest.numberOfRepeatsAllowed, MedicationRequest.dispenseRequest.quantity 
  [FHIR-45088](https://jira.hl7.org/browse/FHIR-45088)
  - removed Must Support from MedicationRequest.substitution, MedicationRequest.substitution.allowed[x] [FHIR-45088](https://jira.hl7.org/browse/FHIR-45088)
  - added Must Support to MedicationRequest.reasonReference [FHIR-45090](https://jira.hl7.org/browse/FHIR-45090)
  - support for AMT codes and PBS Item Codes in MedicationRequest.medicationCodeableConcept changed to define slicing in AU Core (no longer inherited from AU Base as per [FHIR-44821](https://jira.hl7.org/browse/FHIR-44821)). Slicing discriminator changed from slicing by value:system to slicing by value set and the binding strength has been corrected to required. [FHIR-46391](https://jira.hl7.org/browse/FHIR-46391)
- Changes to [AU Core Medication](https://hl7.org.au/fhir/core/1.0.0-ballot/StructureDefinition-au-core-medication.html):
  - removal of Must Support from Medication.manufacturer [FHIR-45130](https://jira.hl7.org/browse/FHIR-45130)
  - removed Must Support from Medication.form [FHIR-45221](https://jira.hl7.org/browse/FHIR-45221)
  - removed Must Support from Medication.ingredient [FHIR-45220](https://jira.hl7.org/browse/FHIR-45220)
  - removed Must Support from Medication.ingredient.item[x] [FHIR-45220](https://jira.hl7.org/browse/FHIR-45220)
  - removed Must Support from Medication.ingredient.isActive [FHIR-45220](https://jira.hl7.org/browse/FHIR-45220), [FHIR-45130](https://jira.hl7.org/browse/FHIR-45130), [FHIR-45049](https://jira.hl7.org/browse/FHIR-45049)
  - removed Must Support from Medication.ingredient.strength [FHIR-45220](https://jira.hl7.org/browse/FHIR-45220)
  - removed Must Support from Medication.amount [FHIR-45219](https://jira.hl7.org/browse/FHIR-45219)
  - support for AMT codes and PBS Item Codes in Medication.code changed to define slicing in AU Core (no longer inherited from AU Base as per [FHIR-44821](https://jira.hl7.org/browse/FHIR-44821)). Slicing discriminator changed from slicing by value:system to value set and the binding strength has been corrected to required. [FHIR-46391](https://jira.hl7.org/browse/FHIR-46391)
- Changes to [AU Core Organizaton](https://hl7.org.au/fhir/core/1.0.0-ballot/StructureDefinition-au-core-organization.html): 
  - removed Must Support from Organization.alias [FHIR-44585](https://jira.hl7.org/browse/FHIR-44585)
  - corrected the invariant au-core-org-01 FHIRPath expression [FHIR-46103](https://jira.hl7.org/browse/FHIR-46103) 
- Changes to [AU Core Patient](https://hl7.org.au/fhir/core/1.0.0-ballot/StructureDefinition-au-core-patient.html):
  - removed Must Support from Patient.extension:birthPlace [FHIR-45018](https://jira.hl7.org/browse/FHIR-45018)
  - removed Must Support from Patient.extension:interpreterRequired [FHIR-45186](https://jira.hl7.org/browse/FHIR-45186)
  - removed Must Support from Patient.birthDate.extension:birthTime [FHIR-45028](https://jira.hl7.org/browse/FHIR-45028)
  - removed Must Support from Patient.birthDate.extension:accuracyIndicator [FHIR-45028](https://jira.hl7.org/browse/FHIR-45028)
  - added Must Support on Patient.name.text [FHIR-44818](https://jira.hl7.org/browse/FHIR-44818)
  - added Must Support on Patient.name.family [FHIR-44818](https://jira.hl7.org/browse/FHIR-44818)
  - added Must Support on Patient.name.given [FHIR-44818](https://jira.hl7.org/browse/FHIR-44818)
  - updated invariants au-core-pat-01, au-core-pat-02, and au-core-pat-04 to allow for a Data Absent Reason extension in order to meet AU Core Missing Data and Suppressed Data requirements [FHIR-46406](https://jira.hl7.org/browse/FHIR-46406)
- Changes to [AU Core Practitioner](https://hl7.org.au/fhir/core/1.0.0-ballot/StructureDefinition-au-core-practitioner.html):
  - removed Must Support from Practitioner.communication [FHIR-44588](https://jira.hl7.org/browse/FHIR-44588)
  - removed Must Support from Practitioner.qualification, Practitioner.qualification.identifier, Practitioner.qualification.code, Practitioner.qualification.period, Practitioner.qualification.issuer: [FHIR-45118](https://jira.hl7.org/browse/FHIR-45118), [FHIR-44587](https://jira.hl7.org/browse/FHIR-44587)
  - removed Must Support from Practitioner.address [FHIR-43860](https://jira.hl7.org/browse/FHIR-43860)
  - removed Must Support from Practitioner.telecom [FHIR-43860](https://jira.hl7.org/browse/FHIR-438608)
  - added Must Support on Practitioner.name.family [FHIR-44819](https://jira.hl7.org/browse/FHIR-44819)
  - added Must Support on Practitioner.name.given [FHIR-44819](https://jira.hl7.org/browse/FHIR-44819)
  - replaced constraint _au-core-prac-01: At least text or family name shall be present_ with making Practitioner.name.family mandatory (1..1) [FHIR-44819](https://jira.hl7.org/browse/FHIR-44819)
- Changes to [AU Core PractitionerRole](https://hl7.org.au/fhir/core/1.0.0-ballot/StructureDefinition-au-core-practitionerrole.html):
  - removed Must Support from PractitionerRole.location [FHIR-43841](https://jira.hl7.org/browse/FHIR-43841)
  - updated invariant au-core-prarol-01 to allow for a Data Absent Reason extension in order to meet AU Core Missing Data and Suppressed Data requirements [FHIR-46419](https://jira.hl7.org/browse/FHIR-46419)
- Changes to [AU Core Procedure](https://hl7.org.au/fhir/core/1.0.0-ballot/StructureDefinition-au-core-procedure.html):
  - removed Must Support from Procedure.statusReason [FHIR-45013](https://jira.hl7.org/browse/FHIR-45013)
  - removed Must Support from Procedure.category [FHIR-45014](https://jira.hl7.org/browse/FHIR-45014)
  - removed Must Support from Procedure.recorder [FHIR-45015](https://jira.hl7.org/browse/FHIR-45015), [FHIR-45082](https://jira.hl7.org/browse/FHIR-45082)
  - removed Must Support from Procedure.asserter [FHIR-45016](https://jira.hl7.org/browse/FHIR-45016), [FHIR-45083](https://jira.hl7.org/browse/FHIR-45083)
  - removed Must Support from Procedure.bodySite and added profile-specific implementation guidance on including body site information [FHIR-45017](https://jira.hl7.org/browse/FHIR-45017), [FHIR-45114](https://jira.hl7.org/browse/FHIR-45114)
  - removed Must Support from Procedure.note [FHIR-45114](https://jira.hl7.org/browse/FHIR-45114)
  - removed the cardinality constraint on Procedure.performed[x], changing it from 1..1 to 0..1 [FHIR-45109](https://jira.hl7.org/browse/FHIR-45109)
  - removed Obligations on Procedure.bodySite [FHIR-46728](https://jira.hl7.org/browse/FHIR-46728)
- Removed AU Core Provenance [FHIR-45191](https://jira.hl7.org/browse/FHIR-45191).
- Removed AU Core MedicationStatement in accordance with the agreement to move work on this profile from AU Core R1 to R2. This decision is noted in the AU Core [Future Candidate Requirements Under Consideration](https://hl7.org.au/fhir/core/1.0.0-ballot/future.html#future-candidate-requirements-under-consideration) [FHIR-45052](https://jira.hl7.org/browse/FHIR-45052).
- Changes to [AU Core Condition](https://hl7.org.au/fhir/core/1.0.0-ballot/StructureDefinition-au-core-condition.html):
  - removed Must Support from Condition.asserter [FHIR-45019](https://jira.hl7.org/browse/FHIR-45019), [FHIR-45127](https://jira.hl7.org/browse/FHIR-45127), [FHIR-45083](https://jira.hl7.org/browse/FHIR-45083)
  - removed Must Support from  Condition.recorder [FHIR-45019](https://jira.hl7.org/browse/FHIR-45019), [FHIR-45082](https://jira.hl7.org/browse/FHIR-45082)
  - removed Must Support from Condition.encounter [FHIR-45189](https://jira.hl7.org/browse/FHIR-45189)
  - added profile-specific implementation guidance on representing no known problems [FHIR-45058](https://jira.hl7.org/browse/FHIR-45058)
  - removed invariant au-core-cond-05 [FHIR-46165](https://jira.hl7.org/browse/FHIR-46165)
- Changes to [AU Core AllergyIntolerance](https://hl7.org.au/fhir/core/1.0.0-ballot/StructureDefinition-au-core-allergyintolerance.html):
  - removed profile-specific implementation guidance "`AllergyIntolerance.verificationStatus` is "unconfirmed" where a sending system does not clearly have this element or "confirmed" depending on the level of certainty" [FHIR-45039](https://jira.hl7.org/browse/FHIR-45039)
  - removed Must Support from AllergyIntolerance.asserter [FHIR-44699](https://jira.hl7.org/browse/FHIR-44699), [FHIR-45083](https://jira.hl7.org/browse/FHIR-45083)
  - removed Must Support from AllergyIntolerance.recorder [FHIR-45082](https://jira.hl7.org/browse/FHIR-45082), [FHIR-45066](https://jira.hl7.org/browse/FHIR-45066)
  - removed Must Support from AllergyIntolerance.encounter [FHIR-45123](https://jira.hl7.org/browse/FHIR-45123)
  - removed Must Support from AllergyIntolerance.note [FHIR-45188](https://jira.hl7.org/browse/FHIR-45188)
  - in AllergyIntolerance.code 
    - changed Indicator of Hypersensitivity or Intolerance to Substance value set binding strength from preferred to extensible [FHIR-44713](https://jira.hl7.org/browse/FHIR-44713) 
    - added Additional Binding, Adverse Reaction Substances and Negated Findings value set as candidate [FHIR-44713](https://jira.hl7.org/browse/FHIR-44713) 
- Changes to [AU Core Smoking Status](https://hl7.org.au/fhir/core/1.0.0-ballot/StructureDefinition-au-core-smokingstatus.html): 
  - removed Must Support from Observation.encounter [FHIR-45222](https://jira.hl7.org/browse/FHIR-45222)
  - removed Must Support from Observation.performer [FHIR-45223](https://jira.hl7.org/browse/FHIR-45223)
  - removed the fixed value constraint 'final' on Observation.status [FHIR-45120](https://jira.hl7.org/browse/FHIR-45120)
  - replaced Observation.code patternCodeableConcept constraint of 266918002 \|Tobacco smoking consumption\| with 1747861000168109 \|Smoking status\| [FHIR-45124](https://jira.hl7.org/browse/FHIR-45124)
  - corrected invariant au-core-obs-01 to change the length check from >= 10 to >= 8 to match required precision to the day [FHIR-46407](https://jira.hl7.org/browse/FHIR-46407)
- Changes to [AU Core Immunization](https://hl7.org.au/fhir/core/1.0.0-ballot/StructureDefinition-au-core-immunization.html):
  - removed Must Support from Immunization.encounter [FHIR-45218](https://jira.hl7.org/browse/FHIR-45218)
  - removed Must Support from Immunization.performer [FHIR-44653](https://jira.hl7.org/browse/FHIR-44653)
  - removed Must Support from Immunization.performer.function [FHIR-44653](https://jira.hl7.org/browse/FHIR-44653)
  - removed Must Support from Immunization.performer.actor [FHIR-44653](https://jira.hl7.org/browse/FHIR-44653)
- Changes to [AU Core Blood Pressure](https://hl7.org.au/fhir/core/1.0.0-ballot/StructureDefinition-au-core-bloodpressure.html): 
  - removed Must Support from Observation.encounter [FHIR-45134](https://jira.hl7.org/browse/FHIR-45134)
  - removed Must Support from Observation.performer [FHIR-44786](https://jira.hl7.org/browse/FHIR-44786)
  - removed the fixed value constraint 'final' on Observation.status [FHIR-45120](https://jira.hl7.org/browse/FHIR-45120)
  - removed invariant au-core-obs-01 (duplicates invariant vs-1) [FHIR-46486](https://jira.hl7.org/browse/FHIR-46486)
- Changes to [AU Core Body Height](https://hl7.org.au/fhir/core/1.0.0-ballot/StructureDefinition-au-core-bodyheight.html):
  - removed Must Support from Observation.encounter [FHIR-45134](https://jira.hl7.org/browse/FHIR-45134)
  - removed Must Support from Observation.performer [FHIR-44786](https://jira.hl7.org/browse/FHIR-44786)
  - removed fixed value constraint 'final' on Observation.status [FHIR-45120](https://jira.hl7.org/browse/FHIR-45120)
  - removed the required binding to Metric Body Length Units value set from Observation.value[x]:valueQuantity to allow the FHIR standard profile binding, and added the Metric Body Length Units value set as a candidate additional binding [FHIR-44787](https://jira.hl7.org/browse/FHIR-44787)
  - removed invariant au-core-obs-01 (duplicates invariant vs-1) [FHIR-46486](https://jira.hl7.org/browse/FHIR-46486)  
- Changes to [AU Core Body Temperature](https://hl7.org.au/fhir/core/1.0.0-ballot/StructureDefinition-au-core-bodytemp.html): 
  - removed Must Support from Observation.encounter [FHIR-45134](https://jira.hl7.org/browse/FHIR-45134)
  - removed Must Support from Observation.performer [FHIR-44786](https://jira.hl7.org/browse/FHIR-44786) 
  - removed the fixed value constraint 'final' on Observation.status [FHIR-45120](https://jira.hl7.org/browse/FHIR-45120)
  - removed the required binding to Metric Body Temperature Units value set from Observation.value[x]:valueQuantity to allow the FHIR standard profile binding, and added the Metric Body Temperature Units value set as a candidate additional binding [FHIR-44787](https://jira.hl7.org/browse/FHIR-44787) 
  - removed invariant au-core-obs-01 (duplicates invariant vs-1) [FHIR-46486](https://jira.hl7.org/browse/FHIR-46486)
- Changes to [AU Core Body Weight](https://hl7.org.au/fhir/core/1.0.0-ballot/StructureDefinition-au-core-bodyweight.html): 
  - removed Must Support from Observation.encounter [FHIR-45134](https://jira.hl7.org/browse/FHIR-45134)
  - removed Must Support from Observation.performer [FHIR-44786](https://jira.hl7.org/browse/FHIR-44786)
  - removed the fixed value constraint 'final' on Observation.status [FHIR-45120](https://jira.hl7.org/browse/FHIR-45120) 
  - removed the required binding to Metric Body Weight Units value set from Observation.value[x]:valueQuantity to allow the FHIR standard profile binding, and added the Metric Body Weight Units value set as a candidate additional binding [FHIR-44787](https://jira.hl7.org/browse/FHIR-44787) 
  - removed invariant au-core-obs-01 (duplicates invariant vs-1) [FHIR-46486](https://jira.hl7.org/browse/FHIR-46486)
- Changes to [AU Core Heart Rate](https://hl7.org.au/fhir/core/1.0.0-ballot/StructureDefinition-au-core-heartrate.html): 
  - removed Must Support from Observation.encounter [FHIR-45134](https://jira.hl7.org/browse/FHIR-45134)
  - removed Must Support from Observation.performer [FHIR-44786](https://jira.hl7.org/browse/FHIR-44786) 
  - removed the fixed value constraint 'final' on Observation.status [FHIR-45120](https://jira.hl7.org/browse/FHIR-45120)
  - added profile-specific implementation guidance on representing pulse rate observations [FHIR-44861](https://jira.hl7.org/browse/FHIR-44861) 
  - removed invariant au-core-obs-01 (duplicates invariant vs-1) [FHIR-46486](https://jira.hl7.org/browse/FHIR-46486)
- Changes to [AU Core Respiration Rate](https://hl7.org.au/fhir/core/1.0.0-ballot/StructureDefinition-au-core-resprate.html): 
  - removed Must Support from Observation.encounter [FHIR-45134](https://jira.hl7.org/browse/FHIR-45134)
  - removed Must Support from Observation.performer [FHIR-44786](https://jira.hl7.org/browse/FHIR-44786)
  - removed the fixed value constraint 'final' on Observation.status [FHIR-45120](https://jira.hl7.org/browse/FHIR-45120)
  - removed invariant au-core-obs-01 (duplicates invariant vs-1) [FHIR-46486](https://jira.hl7.org/browse/FHIR-46486)
- Changes to [AU Core Waist Circumference](https://hl7.org.au/fhir/core/1.0.0-ballot/StructureDefinition-au-core-waistcircum.html): 
  - removed Must Support from Observation.encounter [FHIR-45134](https://jira.hl7.org/browse/FHIR-45134)
  - removed Must Support from Observation.performer [FHIR-44786](https://jira.hl7.org/browse/FHIR-44786)  
  - removed the fixed value constraint 'final' on Observation.status [FHIR-45120](https://jira.hl7.org/browse/FHIR-45120)
  - removed the required binding to Metric Body Length Units value set from Observation.valueQuantity.code to allow the FHIR standard profile binding, and added the Metric Body Length Units value set as a candidate additional binding [FHIR-44787](https://jira.hl7.org/browse/FHIR-44787)
  - removed invariant au-core-obs-01 (duplicates invariant vs-1) [FHIR-46486](https://jira.hl7.org/browse/FHIR-46486)
- Changes to [AU Core Diagnostic Result Observation](https://hl7.org.au/fhir/core/1.0.0-ballot/StructureDefinition-au-core-diagnosticresult.html):
  - changed Observation.performer type from RelatedPerson to AU Base RelatedPerson [FHIR-45228](https://jira.hl7.org/browse/FHIR-45228)
  - removed the required binding to ObservationStatus Result Available value set from Observation.status [FHIR-45125](https://jira.hl7.org/browse/FHIR-45125)
  - updated invariant au-core-obs-01 to change the length check from >= 10 to >= 8 to match required precision to the day [FHIR-46407](https://jira.hl7.org/browse/FHIR-46407)
- Changes to [AU Core Pathology Result Observation](https://hl7.org.au/fhir/core/1.0.0-ballot/StructureDefinition-au-core-diagnosticresult-path.html):
  - changed Observation.performer type from RelatedPerson to AU Base RelatedPerson [FHIR-45228](https://jira.hl7.org/browse/FHIR-45228)
  - removed the required binding to ObservationStatus Result Available value set from Observation.status [FHIR-45125](https://jira.hl7.org/browse/FHIR-45125)
  - updated invariant au-core-obs-01 to change the length check from >= 10 to >= 8 to match required precision to the day [FHIR-46407](https://jira.hl7.org/browse/FHIR-46407)
- Changes in [AU Core Requester CapabilityStatement](https://hl7.org.au/fhir/core/1.0.0-ballot/CapabilityStatement-au-core-requester.html):
  - removed reference to Bulk Data Access implementation guide [FHIR-45113](https://jira.hl7.org/browse/FHIR-45113)
  - corrected the Observation combined search parameter 'patient+category+status' from SHALL to SHOULD [FHIR-45390](https://jira.hl7.org/browse/FHIR-45390)
  - corrected narrative of Location identifier parameter requester requirements on providing both the system and code values from SHOULD to MAY [FHIR-46209](https://jira.hl7.org/browse/FHIR-46209)
  - replaced security and authorization requirements with pointer to Security and Privacy page [FHIR-46067](https://jira.hl7.org/browse/FHIR-46067)
- Changes in [AU Core Responder CapabilityStatement](https://hl7.org.au/fhir/core/1.0.0-ballot/CapabilityStatement-au-core-responder.html):
  - removed reference to Bulk Data Access implementation guide [FHIR-45113](https://jira.hl7.org/browse/FHIR-45113)
  - corrected the Observation combined search parameter 'patient+category+status' from SHALL to SHOULD [FHIR-45390](https://jira.hl7.org/browse/FHIR-45390)
  - corrected MedicationRequest combined search parameter 'patient+intent+authoredon' from SHALL to SHOULD [FHIR-46167](https://jira.hl7.org/browse/FHIR-46167)
  - corrected narrative of Location identifier parameter requester requirements on providing both the system and code values from SHOULD to MAY [FHIR-46209](https://jira.hl7.org/browse/FHIR-46209)
  - replaced security and authorization requirements with pointer to Security and Privacy page [FHIR-46067](https://jira.hl7.org/browse/FHIR-46067)
