AU Core Implementation Guide
2.0.0 - Working Standard

AU Core Implementation Guide - Downloaded Version 2.0.0 See the Directory of published versions

## Change Log

Page standards status: Informative

### Release 2.0.0

- Publication date: 2026-01-28
- 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 2.0.0-ballot to 2.0.0. The list below includes substantive changes to mandatory and Must Support elements inherited from AU Base.

#### Changes in this version

- moved substantive guidance on representing body site and laterality from Representing Body Site, Which May Include Laterality section in General Guidance to the AU Base General Guidance page, with AU Core specific content retained AU Core: FHIR-52372.
- added guidance on profiling approach, extension approach, terminology approach, search parameter approach, actor approach and capability statement approach in the General Guidance page AU Core: FHIR-52393.
- AU Core AllergyIntolerance:
  - changed AllergyIntolerance.reaction.manifestation binding to Adverse Reaction Clinical Manifestation (preferred) AU Base: FHIR-47076
- AU Core Diagnostic Result Observation
  - changed Observation.hasMember to restore reference to AU Base Diagnostic Imaging Result profile inherited from AU Base AU Core: FHIR-52164
- AU Core Patient
  - applied technical correction to invariants inv-pat-1 and inv-pat-2 to ensure terminology validation applies to the correct sub-extension values when multiple extension instances are present AU Base: FHIR-53536
- AU Core Requester CapabilityStatement
  - added AU Base Diagnostic Imaging Result to the supported profiles for Observation as a SHALL AU Core: FHIR-52164
- AU Core Responder CapabilityStatement
  - added AU Base Diagnostic Imaging Result to the supported profiles for Observation as a SHALL AU Core: FHIR-52164

### Release 2.0.0-ballot

- Publication date: 2025-07-31
- Publication status: Ballot for Working Standard
- Based on FHIR version: 4.0.1

This change log documents the significant updates and resolutions implemented from version 1.0.0 to 2.0.0-ballot. The changes in this update are for ballot. The list below includes substantive changes to mandatory and Must Support elements inherited from AU Base.

#### Changes in this version

- moved general guidance on representing communication preferences for a patient or related person to AU Base AU Core: FHIR-46877.
- added to general guidance, reference to AU Base guidance on SNOMED CT Australian Edition AU Core: FHIR-51473.
- added Recorded Sex or Gender and Sex Parameter for Clinical Use to the Sex and Gender page AU Base: 51408.
- updated AUCDI mapping for the Date of assertion element in the Medication use statement data group to be MedicationStatement.dateAsserted AU Core: FHIR-49960.
- updated dependency on SMART App Launch from version 2.1.0 to 2.2.0 AU Core: FHIR-46398.
- AU Core AllergyIntolerance:
  - added Must Support to AllergyIntolerance.note AU Core: FHIR-46940
  - added Must Support and obligation SHOULD:populate to AllergyIntolerance.onsetDateTime for the AU Core Responder AU Core: FHIR-45187
- AU Core Blood Pressure:
  - added guidance on more blood pressure specific concepts for sitting, lying, and standing measurements AU Core: FHIR-49951.
- AU Core Condition:
  - added Must Support and obligation SHOULD:populate to Condition.onsetDateTime for the AU Core Responder AU Core: FHIR-45040
- AU Core Diagnostic Result Observation:
  - clarified that this profile is for specialist and other (non-imaging or non-pathology) results, and added profile-specific implementation guidance to see AU Core Pathology Result Observation profile for pathology results AU Core: FHIR-46889.
- AU Core Encounter
  - changed Encounter.reasonCode binding to Reason for Encounter (preferred) AU Base: FHIR-50996
- AU Core HealthcareService:
  - added new profile, including interaction support to the AU Core CapabilityStatements AU Core: FHIR-49934, AU Core: FHIR-50406, AU Core: FHIR-50405, AU Base: FHIR-46322.
- AU Core Immunization:
  - added Must Support to Immunization.lotNumber AU Core: FHIR-47331
  - added Must Support and obligation SHOULD:populate to Immunization.occurrenceDateTime for the AU Core Responder AU Core: FHIR-45216
- AU Core MedicationRequest:
  - added Must Support to MedicationRequest.dosageInstruction.text AU Core: FHIR-50101
  - removed duplication of obligation flag added by error to MedicationRequest.medicationReference AU Core: 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 AU Core: FHIR-51083
- AU Core MedicationStatement:
  - added the new profile, including interaction support and adding the DiagnosticReport resource to AU Core CapabilityStatements AU Core: FHIR-45091, AU Core: FHIR-49954, AU Core: FHIR-49955, AU Core: FHIR-49956, AU Core: FHIR-49957, AU Core: FHIR-49958, AU Core: FHIR-49959.
  - added Must Support to MedicationStatement.dosage.text AU Core: 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 AU Core: FHIR-51083
  - removed duplication of obligation flag added by error to MedicationRequest.medicationReference AU Core: FHIR-50800
- AU Core Organization:
  - added Must Support on Organization.telecom.system AU Core: FHIR-51042
  - added Must Support on Organization.telecom.value AU Core: FHIR-51042
- AU Core Pathology Result Observation:
  - added profile-specific implementation guidance to see AU Core Diagnostic Result Observation profile for non-imaging or non-pathology results AU Core: FHIR-46889
  - changed Observation.effective[x] type to remove type constraint AU Base: 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 AU Core: FHIR-51083
- AU Core Patient:
  - removed the cardinality constraint on AU Medicare Card Number identifier, changing it from 0..1 to 0..* AU Core: FHIR-46268
  - added AU Patient Internal Identifier as an allowed type for Patient.identifier AU Base: FHIR-48671
  - added Must Support on Patient.telecom.system AU Core: FHIR-51033
  - added Must Support on Patient.telecom.value AU Core: FHIR-51033
  - added Must Support on Patient.telecom.use AU Core: FHIR-51033
- AU Core PractitionerRole:
  - added Must Support on PractitionerRole.telecom.system AU Core: FHIR-51034
  - added Must Support on PractitionerRole.telecom.value AU Core: FHIR-51034
- AU Core Procedure:
  - added Must Support and obligation SHOULD:populate to Procedure.performedDateTime for the AU Core Responder AU Core: FHIR-45145
- AU Core RelatedPerson:
  - added the new profile, including interaction support and replacing references to AU Base Related Person with AU Core RelatedPerson AU Core: FHIR-49745, AU Core: FHIR-49746, AU Core: FHIR-44600, AU Core: FHIR-49747.
- AU Core Smoking Status:
  - 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 AU Core: 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 to 1.0.0.

#### Changes in this version

- Added Sex and Gender 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 AU Core: FHIR-47176, AU Core: FHIR-47178, AU Core: FHIR-47182, AU Core: FHIR-47183, AU Core: FHIR-46892, AU Core: FHIR-46896.
- AU Core Diagnostic Result Observation:
  - corrected base profile to AU Base Diagnostic Observation AU Core: FHIR-47116
  - removed constraints from Observation.hasMember.reference AU Core: FHIR-46728, AU Core: 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 AU Core: FHIR-46737
- AU Core Location: removed Must Support flag and associated Obligation extensions from Location.identifier AU Core: FHIR-47105 and Location.mode AU Core: FHIR-47104
- AU Core MedicationRequest: 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 AU Core: FHIR-46417
- AU Core Pathology Result Observation:
  - removed constraints from Observation.hasMember.reference and Observation.specimen.reference AU Core: FHIR-46728, AU Core: FHIR-46731
  - removed Must Support and Obligations from Observation.identifier, Observation.method and Observation.note AU Core: FHIR-46732
- AU Core search parameters and search parameter combinations:
  - Observation search parameters: changed 'patient' from SHALL to MAY AU Core: FHIR-47171
  - Patient search parameters: removed the requirement for including an offset for 'birthdate' AU Core: FHIR-47150
  - Organization search parameters: changed 'name' search parameter from SHOULD to SHALL AU Core: FHIR-47109
  - Location search parameters:
    - changed 'address' search parameter from SHALL to SHOULD AU Core: FHIR-47107
    - removed 'identifier' AU Core: FHIR-48927
  - PractitionerRole search parameters: added 'role' as a SHOULD AU Core: FHIR-47115
  - MedicationRequest search parameters: changed 'patient+intent' and 'patient+intent+status' from SHALL to SHOULD, and added a new MedicationRequest search parameter 'patient+status' as a SHALL AU Core: FHIR-47073
  - updated requirement to mandate both system and code values for identifier search parameters on Organization, Practitioner and PractitionerRole AU Core: FHIR-46782
- AU Core Requester CapabilityStatement:
  - removed all instances of MAY support create, update, delete, vread, patch, history-instance AU Core: FHIR-46060
  - removed MAY support search-system and history-system AU Core: FHIR-46059
  - _id Patient search parameter changed to SHOULD from SHALL AU Core: FHIR-46390
  - added missing entries for DocumentReference and RelatedPerson resources AU Core: FHIR-46546
- AU Core Responder CapabilityStatement:
  - removed all instances of MAY support create, update, delete, vread, patch, history-instance AU Core: FHIR-46060
  - corrected narrative of PractitionerRole practitioner.identifier search parameter from Medicare Provider Number to HPI-I AU Core: FHIR-47013
  - corrected support for Practitioner _id search parameter to SHOULD instead of SHALL AU Core: FHIR-46777
  - added missing entries for DocumentReference and RelatedPerson resources AU Core: FHIR-46546

### Release 1.0.0-ballot

- Publication date: 2024-08-05
- Publication status: Ballot for Working Standard
- Based on FHIR version: 4.0.1

This change log documents the significant updates and resolutions implemented from version 0.3.0-ballot to 1.0.0-ballot.

#### Changes in this version

- In the AU Core Data for Interoperability 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.
  - updated mapping of AUCDI Medication Use Statement to be represented by MedicationStatement only au-fhir-core #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 AU Core: 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' AU Core: FHIR-45231, AU Core: FHIR-45195, AU Core: FHIR-45163, AU Core: FHIR-45095, AU Core: FHIR-45073
  - introduced FHIR Obligations & ActorDefinitions to clarify system actors and associated obligations AU Core: FHIR-45231, AU Core: FHIR-45195, AU Core: FHIR-45163, AU Core: FHIR-45073
  - clarified the documentation on Must Support and Mandatory elements using the language of Obligation AU Core: FHIR-45231, AU Core: FHIR-45195, AU Core: FHIR-45163, AU Core: FHIR-45073, AU Core: FHIR-43852
  - clarified capabilities in AU Core R1 by:
    - renamed AU Core Server to AU Core Responder AU Core: FHIR-45231, AU Core: FHIR-45195, AU Core: FHIR-45163, AU Core: FHIR-45073, AU Core: FHIR-43852
    - renamed AU Core Client to AU Core Requester AU Core: FHIR-45231, AU Core: FHIR-45195, AU Core: FHIR-45163, AU Core: FHIR-45073, AU Core: FHIR-43852
  - added Actor Definitions page under FHIR Artefacts AU Core: FHIR-45231, AU Core: FHIR-45195, AU Core: FHIR-45163, AU Core: FHIR-45073.
- Added Security and Privacy page AU Core: FHIR-45067, and added requirements on supporting TLS 1.2 and TLS 1.3 AU Core: FHIR-46068.
- Added AU Variance Statement page AU Core: FHIR-46034.
- Added additional guidance for body site / laterality implementation to General Guidance page AU Core: FHIR-45176.
- Moved the Medicine Information section from the General Guidance page to a new Medicine Information page AU Core: FHIR-45165.
- Changes to the following AU Core search parameters and search parameter combinations:
  - clarified multipleAnd comparator support for AU Core date search parameters AU Core: FHIR-46309
  - Encounter search parameters: removed discharge-disposition, identifier, type, patient+discharge-disposition, patient+type AU Core: FHIR-45954, AU Core: FHIR-45603, AU Core: FHIR-46057
  - MedicationRequest search parameters: removed identifier and category AU Core: FHIR-45991
  - Patient search parameters:
    - birthdate search parameter support for comparators gt, le, lt, ge to SHOULD from SHALL and multipleAnd support introduced as SHOULD AU Core: FHIR-45410
    - corrected the search parameter for gender identity to `gender-identity` not `patient-gender-identity` AU Core: FHIR-45057.
  - Organization search parameters:
    - address search parameter to SHOULD instead of SHALL AU Core: FHIR-45133
    - name search parameter to SHOULD instead of SHALL AU Core: FHIR-45133
- Changes to AU Core Immunization:
  - removed Must Support from Immunization.encounter AU Core: FHIR-45218
  - removed Must Support from Immunization.performer, Immunization.performer.function, Immunization.performer.actor AU Core: FHIR-44653
  - removed Must Support from Immunization.protocolApplied, Immunization.protocolApplied.series, Immunization.protocolApplied.targetDisease, Immunization.protocolApplied.doseNumber[x] AU Core: FHIR-44674, AU Core: FHIR-44656, AU Core: FHIR-44654
  - removed Must Support from Immunization.reasonCode AU Core: FHIR-44654, AU Core: FHIR-45968
  - added Must Support to Immunization.primarySource AU Core: FHIR-44659
  - changed Immunization.vaccineCode slicing rule from slicing by system to slice by value set AU Core: 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 AU Core: 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. AU Core: FHIR-46391
- Changes to AU Core Encounter:
  - removed Must Support from Encounter.identifier AU Core: FHIR-45212
  - removed Must Support from Encounter.type AU Core: FHIR-44580
  - removed Must Support from Encounter.hospitalization, Encounter.hospitalization.dischargeDisposition AU Core: FHIR-45210
  - changed Encounter.participant.individual type from RelatedPerson to AU Base RelatedPerson AU Core: FHIR-45228
- Changes to AU Core Location: removed Must Support from Location.description in AU Core: FHIR-45029.
- Changes to AU Core MedicationRequest:
  - changed MedicationRequest.requester type from RelatedPerson to AU Base RelatedPerson AU Core: FHIR-45228
  - removed Must Support from MedicationRequest.identifier AU Core: FHIR-45208
  - removed Must Support from MedicationRequest.category AU Core: FHIR-45207
  - removed Must Support from MedicationRequest.note AU Core: FHIR-45209
  - removed Must Support from MedicationRequest.dispenseRequest, MedicationRequest.dispenseRequest.validityPeriod, MedicationRequest.dispenseRequest.numberOfRepeatsAllowed, MedicationRequest.dispenseRequest.quantity AU Core: FHIR-45088
  - removed Must Support from MedicationRequest.substitution, MedicationRequest.substitution.allowed[x] AU Core: FHIR-45088
  - added Must Support to MedicationRequest.reasonReference AU Core: 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 AU Core: FHIR-44821). Slicing discriminator changed from slicing by value:system to slicing by value set and the binding strength has been corrected to required. AU Core: FHIR-46391
- Changes to AU Core Medication:
  - removal of Must Support from Medication.manufacturer AU Core: FHIR-45130
  - removed Must Support from Medication.form AU Core: FHIR-45221
  - removed Must Support from Medication.ingredient AU Core: FHIR-45220
  - removed Must Support from Medication.ingredient.item[x] AU Core: FHIR-45220
  - removed Must Support from Medication.ingredient.isActive AU Core: FHIR-45220, AU Core: FHIR-45130, AU Core: FHIR-45049
  - removed Must Support from Medication.ingredient.strength AU Core: FHIR-45220
  - removed Must Support from Medication.amount AU Core: 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 AU Core: FHIR-44821). Slicing discriminator changed from slicing by value:system to value set and the binding strength has been corrected to required. AU Core: FHIR-46391
- Changes to AU Core Organization:
  - removed Must Support from Organization.alias AU Core: FHIR-44585
  - corrected the invariant au-core-org-01 FHIRPath expression AU Core: FHIR-46103
- Changes to AU Core Patient:
  - removed Must Support from Patient.extension:birthPlace AU Core: FHIR-45018
  - removed Must Support from Patient.extension:interpreterRequired AU Core: FHIR-45186
  - removed Must Support from Patient.birthDate.extension:birthTime AU Core: FHIR-45028
  - removed Must Support from Patient.birthDate.extension:accuracyIndicator AU Core: FHIR-45028
  - added Must Support on Patient.name.text AU Core: FHIR-44818
  - added Must Support on Patient.name.family AU Core: FHIR-44818
  - added Must Support on Patient.name.given AU Core: 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 AU Core: FHIR-46406
- Changes to AU Core Practitioner:
  - removed Must Support from Practitioner.communication AU Core: FHIR-44588
  - removed Must Support from Practitioner.qualification, Practitioner.qualification.identifier, Practitioner.qualification.code, Practitioner.qualification.period, Practitioner.qualification.issuer: AU Core: FHIR-45118, AU Core: FHIR-44587
  - removed Must Support from Practitioner.address AU Core: FHIR-43860
  - removed Must Support from Practitioner.telecom AU Core: FHIR-43860
  - added Must Support on Practitioner.name.family AU Core: FHIR-44819
  - added Must Support on Practitioner.name.given AU Core: 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) AU Core: FHIR-44819
- Changes to AU Core PractitionerRole:
  - removed Must Support from PractitionerRole.location AU Core: 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 AU Core: FHIR-46419
- Changes to AU Core Procedure:
  - removed Must Support from Procedure.statusReason AU Core: FHIR-45013
  - removed Must Support from Procedure.category AU Core: FHIR-45014
  - removed Must Support from Procedure.recorder AU Core: FHIR-45015, AU Core: FHIR-45082
  - removed Must Support from Procedure.asserter AU Core: FHIR-45016, AU Core: FHIR-45083
  - removed Must Support from Procedure.bodySite and added profile-specific implementation guidance on including body site information AU Core: FHIR-45017, AU Core: FHIR-45114
  - removed Must Support from Procedure.note AU Core: FHIR-45114
  - removed the cardinality constraint on Procedure.performed[x], changing it from 1..1 to 0..1 AU Core: FHIR-45109
  - removed Obligations on Procedure.bodySite AU Core: FHIR-46728
- Removed AU Core Provenance AU Core: 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 AU Core: FHIR-45052.
- Changes to AU Core Condition:
  - removed Must Support from Condition.asserter AU Core: FHIR-45019, AU Core: FHIR-45127, AU Core: FHIR-45083
  - removed Must Support from Condition.recorder AU Core: FHIR-45019, AU Core: FHIR-45082
  - removed Must Support from Condition.encounter AU Core: FHIR-45189
  - added profile-specific implementation guidance on representing no known problems AU Core: FHIR-45058
  - removed invariant au-core-cond-05 AU Core: FHIR-46165
- Changes to AU Core AllergyIntolerance:
  - 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" AU Core: FHIR-45039
  - removed Must Support from AllergyIntolerance.asserter AU Core: FHIR-44699, AU Core: FHIR-45083
  - removed Must Support from AllergyIntolerance.recorder AU Core: FHIR-45082, AU Core: FHIR-45066
  - removed Must Support from AllergyIntolerance.encounter AU Core: FHIR-45123
  - removed Must Support from AllergyIntolerance.note AU Core: FHIR-45188
  - in AllergyIntolerance.code
    - changed Indicator of Hypersensitivity or Intolerance to Substance value set binding strength from preferred to extensible AU Core: FHIR-44713
    - added Additional Binding, Adverse Reaction Substances and Negated Findings value set as candidate AU Core: FHIR-44713
- Changes to AU Core Smoking Status:
  - removed Must Support from Observation.encounter AU Core: FHIR-45222
  - removed Must Support from Observation.performer AU Core: FHIR-45223
  - removed the fixed value constraint 'final' on Observation.status AU Core: FHIR-45120
  - replaced Observation.code patternCodeableConcept constraint of 266918002 |Tobacco smoking consumption| with 1747861000168109 |Smoking status| AU Core: FHIR-45124
  - corrected invariant au-core-obs-01 to change the length check from >= 10 to >= 8 to match required precision to the day AU Core: FHIR-46407
- Changes to AU Core Immunization:
  - removed Must Support from Immunization.encounter AU Core: FHIR-45218
  - removed Must Support from Immunization.performer AU Core: FHIR-44653
  - removed Must Support from Immunization.performer.function AU Core: FHIR-44653
  - removed Must Support from Immunization.performer.actor AU Core: FHIR-44653
- Changes to AU Core Blood Pressure:
  - removed Must Support from Observation.encounter AU Core: FHIR-45134
  - removed Must Support from Observation.performer AU Core: FHIR-44786
  - removed the fixed value constraint 'final' on Observation.status AU Core: FHIR-45120
  - removed invariant au-core-obs-01 (duplicates invariant vs-1) AU Core: FHIR-46486
- Changes to AU Core Body Height:
  - removed Must Support from Observation.encounter AU Core: FHIR-45134
  - removed Must Support from Observation.performer AU Core: FHIR-44786
  - removed fixed value constraint 'final' on Observation.status AU Core: 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 AU Core: FHIR-44787
  - removed invariant au-core-obs-01 (duplicates invariant vs-1) AU Core: FHIR-46486
- Changes to AU Core Body Temperature:
  - removed Must Support from Observation.encounter AU Core: FHIR-45134
  - removed Must Support from Observation.performer AU Core: FHIR-44786
  - removed the fixed value constraint 'final' on Observation.status AU Core: 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 AU Core: FHIR-44787
  - removed invariant au-core-obs-01 (duplicates invariant vs-1) AU Core: FHIR-46486
- Changes to AU Core Body Weight:
  - removed Must Support from Observation.encounter AU Core: FHIR-45134
  - removed Must Support from Observation.performer AU Core: FHIR-44786
  - removed the fixed value constraint 'final' on Observation.status AU Core: 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 AU Core: FHIR-44787
  - removed invariant au-core-obs-01 (duplicates invariant vs-1) AU Core: FHIR-46486
- Changes to AU Core Heart Rate:
  - removed Must Support from Observation.encounter AU Core: FHIR-45134
  - removed Must Support from Observation.performer AU Core: FHIR-44786
  - removed the fixed value constraint 'final' on Observation.status AU Core: FHIR-45120
  - added profile-specific implementation guidance on representing pulse rate observations AU Core: FHIR-44861
  - removed invariant au-core-obs-01 (duplicates invariant vs-1) AU Core: FHIR-46486
- Changes to AU Core Respiration Rate:
  - removed Must Support from Observation.encounter AU Core: FHIR-45134
  - removed Must Support from Observation.performer AU Core: FHIR-44786
  - removed the fixed value constraint 'final' on Observation.status AU Core: FHIR-45120
  - removed invariant au-core-obs-01 (duplicates invariant vs-1) AU Core: FHIR-46486
- Changes to AU Core Waist Circumference:
  - removed Must Support from Observation.encounter AU Core: FHIR-45134
  - removed Must Support from Observation.performer AU Core: FHIR-44786
  - removed the fixed value constraint 'final' on Observation.status AU Core: 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 AU Core: FHIR-44787
  - removed invariant au-core-obs-01 (duplicates invariant vs-1) AU Core: FHIR-46486
- Changes to AU Core Diagnostic Result Observation:
  - changed Observation.performer type from RelatedPerson to AU Base RelatedPerson AU Core: FHIR-45228
  - removed the required binding to ObservationStatus Result Available value set from Observation.status AU Core: FHIR-45125
  - updated invariant au-core-obs-01 to change the length check from >= 10 to >= 8 to match required precision to the day AU Core: FHIR-46407
- Changes to AU Core Pathology Result Observation:
  - changed Observation.performer type from RelatedPerson to AU Base RelatedPerson AU Core: FHIR-45228
  - removed the required binding to ObservationStatus Result Available value set from Observation.status AU Core: FHIR-45125
  - updated invariant au-core-obs-01 to change the length check from >= 10 to >= 8 to match required precision to the day AU Core: FHIR-46407
- Changes in AU Core Requester CapabilityStatement:
  - removed reference to Bulk Data Access implementation guide AU Core: FHIR-45113
  - corrected the Observation combined search parameter 'patient+category+status' from SHALL to SHOULD AU Core: FHIR-45390
  - corrected narrative of Location identifier parameter requester requirements on providing both the system and code values from SHOULD to MAY AU Core: FHIR-46209
  - replaced security and authorization requirements with pointer to Security and Privacy page AU Core: FHIR-46067
- Changes in AU Core Responder CapabilityStatement:
  - removed reference to Bulk Data Access implementation guide AU Core: FHIR-45113
  - corrected the Observation combined search parameter 'patient+category+status' from SHALL to SHOULD AU Core: FHIR-45390
  - corrected MedicationRequest combined search parameter 'patient+intent+authoredon' from SHALL to SHOULD AU Core: FHIR-46167
  - corrected narrative of Location identifier parameter requester requirements on providing both the system and code values from SHOULD to MAY AU Core: FHIR-46209
  - replaced security and authorization requirements with pointer to Security and Privacy page AU Core: FHIR-46067