Update as follows:  QI-Core Profile-based path Action Include in QI-Core 6.0? Justification QICoreCommunication. implicitRules Keep YES   QICoreCommunication.extension: recorded Keep YES Required to know time the reason for not communicating occurred dateTime URL:   http://hl7.org/fhir/us/qicore/StructureDefinition/qicore-recorded QICoreCommunication. modifierExtension Keep YES   QICoreCommunication. status Keep YES Maintain required binding to EventStatus with FIXED VALUE = not-done QICoreCommunication. statusReason Keep YES This element is used in CommunicationNotDone with extensible binding to QICoreNegationReasonCodes . QICoreCommunication. subject KEEP YES Subject references QICorePatient, Group QICoreCommunication. topic KEEP YES “description of the purpose/content” – preferred binding to CommunicationTopic (e.g., prescription-refill-request, progress-update, report-labs, appointment-reminder, phone-consult, summary-report) QICoreCommunication.topic.extension: notDoneValueSet KEEP YES URL:   http://hl7.org/fhir/us/qicore/StructureDefinition/qicore-notDoneValueSet See Also FHIR-41492 technical correction Note: Existing https://build.fhir.org/ig/HL7/fhir-qi-core/StructureDefinition-qicore-communicationnotdone.html#constraints topic.extension("http://hl7.org/fhir/us/qicore/StructureDefinition/qicore-notDoneValueSet").exists() xor topic.coding.exists() should be topic.extension('http://hl7.org/fhir/us/qicore/StructureDefinition/qicore-notDoneValueSet').exists() xor topic.coding.exists() Single quotes, not double quotes QICoreCommunication.reasonCode remove NO using topic instead