This table lists extensions for the Task resource defined in association with the core specification. For background information, see
Extensibility.
Additional extensions may be found in published
Implementation Guides 
and in the
Conformance resource registry .
| Identity | Conf. | Type | Context | FMM |
| Extensions defined for this resource |
| event-eventHistory | 0..* | Reference | Observation, DiagnosticReport, Task, SupplyDelivery, DeviceUsage | 1 |
| request-performerOrder | 0..1 | integer | ServiceRequest.performer, Task.requestedPerformer | 1 |
| request-replaces | 0..* | Reference | NutritionOrder, SupplyRequest, Task | 1 |
| task-replaces | 0..* | Reference | Task | 1 |
| workflow-compliesWith | 0..* | (Choice) | CarePlan, CarePlan.activity.plannedActivityDetail, CommunicationRequest,
DeviceRequest, ImmunizationRecommendation, NutritionOrder, RequestOrchestration,
SupplyRequest, ServiceRequest, Task | 1 |
| workflow-followOnOf | 0..* | Reference | Task, DeviceRequest, ServiceRequest, Procedure, Encounter | 1 |
| workflow-generatedFrom | 0..1 | canonical | CarePlan, CarePlan.activity.plannedActivityDetail, CommunicationRequest,
DeviceRequest, ImmunizationEvaluation, ImmunizationRecommendation,
NutritionOrder, RequestOrchestration, SupplyRequest, ServiceRequest,
Task | 1 |
| workflow-releaseDate | 0..1 | dateTime | Account, Appointment, ArtifactAssessment, CarePlan, CarePlan.activity,
ClinicalImpression, Communication, CommunicationRequest, Contract,
DeviceDispense, DeviceRequest, DeviceUsage, Encounter, Endpoint, EpisodeOfCare,
Goal, MedicationAdministration, MedicationDispense, MedicationRequest,
NutritionIntake, NutritionOrder, Procedure, RequestOrchestration,
ServiceRequest, SupplyRequest, Task | 1 |
| workflow-researchStudy | 0..* | Reference | Composition, Consent, DeviceUsage, DiagnosticReport, Encounter, FamilyMemberHistory,
Immunization, DocumentReference, MedicationAdministration, MedicationDispense,
MedicationStatement, Observation, Procedure, QuestionnaireResponse,
RiskAssessment, ServiceRequest, SupplyDelivery, Task | 1 |
| workflow-triggeredBy | 0..1 | (Choice) | CarePlan, CarePlan.activity.plannedActivityDetail, CommunicationRequest,
DeviceRequest, Encounter, ImmunizationRecommendation, NutritionOrder,
RequestOrchestration, SupplyRequest, ServiceRequest, Task, Condition,
Communication, DiagnosticReport, DocumentReference, FamilyMemberHistory,
Immunization, Observation, QuestionnaireResponse, SupplyDelivery | 1 |
| Extensions defined for many resources including this resource |
| datatype | 0..1 | string | Base | 1 |
| artifact-author | 0..* | ContactDetail | DomainResource | 1 |
| derivation-reference | 0..* | (complex) | Resource, Element | 0 |
| patient-sexForClinicalUse | 0..* | (complex) | Resource | 1 |
| resource-instance-description | 0..1 | markdown | Resource | 1 |
| resource-instance-name | 0..1 | string | Resource | 1 |
| resource-pertainsToGoal | 0..* | Reference | Resource | 1 |
| satisfies-requirement | 0..* | (complex) | Resource, Element | 0 |
| Extensions that refer to this resource |
| task-replaces | 0..* | Reference | Task | 1 |
| Extensions that refer to many resources including this resource |
| alternate-reference | 0..1 | Reference | Reference | 1 |
| cqf-relativeDateTime | 0..1 | (complex) | Element | D |
| diagnosticReport-focus | 0..* | Reference | DiagnosticReport | 0 |
| event-basedOn | 0..* | Reference | Condition, ChargeItem, ClinicalImpression, Composition, Consent, Coverage,
DetectedIssue, DocumentManifest, EpisodeOfCare, ExplanationOfBenefit,
FamilyMemberHistory, ImmunizationEvaluation, InventoryReport, MedicationStatement,
PaymentNotice, PaymentReconciliation | 1 |
| event-partOf | 0..* | Reference | DiagnosticReport, Condition | 1 |
| flag-detail | 0..* | Reference | Flag | 1 |
| patient-sexForClinicalUse | 0..* | (complex) | Resource | 1 |
| replaces | 0..* | canonical | ActivityDefinition, ActorDefinition, CapabilityStatement, ChargeItemDefinition,
Citation, CodeSystem, CompartmentDefinition, ConceptMap, ConditionDefinition,
EventDefinition, Evidence, EvidenceReport, EvidenceVariable, ExampleScenario,
GraphDefinition, ImplementationGuide, Library, Measure, MessageDefinition,
NamingSystem, ObservationDefinition, OperationDefinition, PlanDefinition,
Questionnaire, Requirements, SearchParameter, SpecimenDefinition,
StructureDefinition, StructureMap, SubscriptionTopic, TerminologyCapabilities,
TestScript, ValueSet | 1 |
| request-replaces | 0..* | Reference | NutritionOrder, SupplyRequest, Task | 1 |
| workflow-barrier | 0..* | CodeableReference | Goal, CommunicationRequest, CarePlan.activity | 1 |
| workflow-protectiveFactor | 0..* | CodeableReference | Goal, CommunicationRequest, CarePlan.activity | 1 |
| workflow-supportingInfo | 0..* | Reference | DiagnosticReport, DocumentReference, Encounter, Observation, CommunicationRequest | 1 |
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