FHIR Extensions Pack, published by HL7 International / FHIR Infrastructure. This guide is not an authorized publication; it is the continuous build for version 5.2.0-ballot built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7/fhir-extensions/ and changes regularly. See the Directory of published versions
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 | WG | Status | Δ v1.0.0 |
| Extensions defined for the Task resource |
| event-eventHistory | 0..* | Reference | Observation, DiagnosticReport, Task, SupplyDelivery, DeviceUsage | fhir | Trial-Use: FMM3 | n/c |
| request-doNotPerform | 0..1M | boolean | NutritionOrder, Task | fhir | Trial-Use: FMM3 | n/c |
| request-performerOrder | 0..1 | integer | ServiceRequest.performer, Task.requestedPerformer | fhir | Trial-Use: FMM3 | n/c |
| request-replaces | 0..* | Reference | NutritionOrder, SupplyRequest, Task | fhir | Trial-Use: FMM3 | n/c |
| task-replaces | 0..* | Reference | Task | oo | Trial-Use: FMM3 |  Changed: |
| workflow-compliesWith | 0..* | (Choice) | CarePlan, CarePlan.activity.plannedActivityDetail, CommunicationRequest,
DeviceRequest, ImmunizationRecommendation, NutritionOrder, RequestOrchestration,
SupplyRequest, ServiceRequest, Task | fhir | Trial-Use: FMM2 | n/c |
| workflow-followOnOf | 0..* | Reference | Task, DeviceRequest, ServiceRequest, Procedure, Encounter | fhir | Trial-Use: FMM2 | n/c |
| workflow-generatedFrom | 0..1 | canonical | CarePlan, CarePlan.activity.plannedActivityDetail, CommunicationRequest,
DeviceRequest, ImmunizationEvaluation, ImmunizationRecommendation,
NutritionOrder, RequestOrchestration, SupplyRequest, ServiceRequest,
Task | fhir | Trial-Use: FMM2 | n/c |
| 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 | fhir | Trial-Use: FMM2 | n/c |
| workflow-researchStudy | 0..* | Reference | Composition, Consent, DeviceUsage, DiagnosticReport, Encounter, FamilyMemberHistory,
Immunization, DocumentReference, MedicationAdministration, MedicationDispense,
MedicationStatement, Observation, Procedure, QuestionnaireResponse,
RiskAssessment, ServiceRequest, SupplyDelivery, Task | fhir | Trial-Use: FMM3 | n/c |
| 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 | fhir | Trial-Use: FMM2 | n/c |
| Extensions defined for many resources including the Task resource |
| datatype | 0..1 | string | Base | fhir | Trial-Use: FMM2 | n/c |
| artifact-approvalDate | 0..1 | date | Resource | cds | Trial-Use: FMM1 |  Added: |
| artifact-author | 0..* | ContactDetail | Resource | cds | Trial-Use: FMM2 | Changed: |
| artifact-citeAs | 0..1 | (Choice) | Resource | cds | Trial-Use: FMM1 | Added: |
| artifact-contact | 0..* | ContactDetail | Resource | cds | Trial-Use: FMM2 | Changed: |
| artifact-copyright | 0..1 | markdown | Resource | cds | Trial-Use: FMM2 | Changed: |
| artifact-copyrightLabel | 0..1 | string | Resource | cds | Experimental
Draft: FMM1 | Changed: |
| artifact-date | 0..1 | dateTime | Resource | cds | Trial-Use: FMM2 | Changed: |
| artifact-description | 0..1 | markdown | Resource | cds | Trial-Use: FMM2 | Changed: |
| artifact-effectivePeriod | 0..1 | Period | Resource | cds | Trial-Use: FMM1 | Added: |
| artifact-experimental | 0..1 | boolean | Resource | cds | Trial-Use: FMM2 | Changed: |
| artifact-identifier | 0..* | Identifier | Resource | cds | Trial-Use: FMM2 | Changed: |
| artifact-isOwned | 0..1 | boolean | RelatedArtifact, ActivityDefinition.library, PlanDefinition.library,
Measure.library, DomainResource.extension, type.exists() and type = 'composed-of' | cds | Trial-Use: FMM1 | Added: |
| artifact-jurisdiction | 0..* | CodeableConcept | Resource | cds | Trial-Use: FMM2 | Changed: |
| artifact-lastReviewDate | 0..1 | date | Resource | cds | Trial-Use: FMM1 | Added: |
| artifact-name | 0..1 | string | Resource | cds | Trial-Use: FMM2 | Changed: |
| artifact-publisher | 0..1 | string | Resource | cds | Trial-Use: FMM2 | Changed: |
| artifact-purpose | 0..1 | markdown | Resource | cds | Trial-Use: FMM2 | Changed: |
| artifact-relatedArtifact | 0..* | RelatedArtifact | Resource | cds | Trial-Use: FMM2 | Changed: |
| artifact-releaseDescription | 0..1 | markdown | Resource | cds | Trial-Use: FMM1 | Added: |
| artifact-releaseLabel | 0..1 | string | Resource | cds | Trial-Use: FMM1 | Added: |
| artifact-status | 0..1M | code | Resource | cds | Trial-Use: FMM2 | Changed: |
| artifact-title | 0..1 | string | Resource | cds | Trial-Use: FMM2 | Changed: |
| artifact-topic | 0..* | CodeableConcept | Resource | cds | Trial-Use: FMM2 | Changed: |
| artifact-url | 0..1 | uri | Resource | cds | Trial-Use: FMM2 | Changed: |
| artifact-usage | 0..1 | markdown | Resource | cds | Trial-Use: FMM1 | Added: |
| artifact-useContext | 0..* | UsageContext | Resource | cds | Trial-Use: FMM2 | Changed: |
| artifact-version | 0..1 | string | Resource | cds | Trial-Use: FMM2 | Changed: |
| artifact-versionAlgorithm | 0..1 | (Choice) | Resource | cds | Draft: FMM1 | Changed: |
| artifact-versionPolicy | 0..1 | CodeableConcept | Resource | cds | Trial-Use: FMM1 | Added: |
| artifactassessment-disposition | 0..1 | code | Resource | cds | Draft: FMM1 | Added: |
| artifactassessment-workflowStatus | 0..1 | code | Resource | cds | Draft: FMM1 | Added: |
| cqf-artifactComment | 0..* | (complex) | Resource | cds | Trial-Use: FMM3 | Changed: |
| cqf-definitionTerm | 0..1 | (complex) | Resource | cds | Trial-Use: FMM3 | Added: |
| cqf-directReferenceCode | 0..* | Coding | Resource | cds | Trial-Use: FMM2 | Changed: |
| cqf-knowledgeCapability | 0..* | code | DomainResource | cds | Trial-Use: FMM2 | Changed: |
| cqf-knowledgeRepresentationLevel | 0..* | code | DomainResource | cds | Trial-Use: FMM2 | Changed: |
| cqf-library | 0..* | canonical | DomainResource | cds | Trial-Use: FMM3 | Changed: |
| cqf-logicDefinition | 0..* | (complex) | DomainResource | cds | Trial-Use: FMM2 | Changed: |
| cqf-measureInfo | 0..* | (complex) | Resource, Reference | cds | Trial-Use: FMM3 | Changed: |
| cqf-messages | 0..* | Reference | Resource | cds | Trial-Use: FMM3 | Added: |
| cqf-scope | 0..1 | string | Resource | cds | Trial-Use: FMM1 | Added: |
| derivation-reference | 0..* | (complex) | Resource, Element | fhir | Trial-Use: FMM2 | n/c |
| feature-assertion | 0..* | Coding | Provenance.target, Resource.meta | fhir | Experimental
Draft: FMM0 | Added: |
| note | 0..* | Annotation | Resource, Composition.section | fhir | Trial-Use: FMM1 | Added: |
| obligations-profile | 0..* | (complex) | Provenance.target, Resource.meta | fhir | Experimental
Draft: FMM0 | Added: |
| patient-sexParameterForClinicalUse | 0..* | (complex) | Resource | pa | Experimental
Draft: FMM1 | Changed: |
| resource-instance-description | 0..1 | markdown | Resource | fhir | Trial-Use: FMM2 | n/c |
| resource-instance-name | 0..1 | string | Resource | fhir | Trial-Use: FMM2 | n/c |
| resource-pertainsToGoal | 0..* | Reference | Resource | fhir | Trial-Use: FMM3 | n/c |
| satisfies-requirement | 0..* | (complex) | Resource, Element | fhir | Trial-Use: FMM2 | Changed: |
| structuredefinition-fmm | 0..1 | integer | DomainResource, Resource | fhir | Trial-Use: FMM3 | n/c |
| structuredefinition-fmm-support | 0..1 | markdown | DomainResource | fhir | Trial-Use: FMM2 | n/c |
| structuredefinition-standards-status-reason | 0..1 | markdown | DomainResource, http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status | fhir | Experimental
Draft: FMM1 | n/c |
| structuredefinition-wg | 0..1 | code | DomainResource | fhir | Trial-Use: FMM3 | n/c |
| version-specific-use | 0..* | (complex) | Element, Resource | fhir | Trial-Use: FMM1 | Added: |
| version-specific-value | 0..* | (complex) | Element, Resource | fhir | Trial-Use: FMM1 | Added: |
| Extensions that refer to the Task resource |
| task-replaces | 0..* | Reference | Task | oo | Trial-Use: FMM3 | Changed: |
| Extensions that refer to many resources including the Task resource |
| alternate-reference | 0..1 | Reference | Reference | fhir | Trial-Use: FMM2 | n/c |
| artifact-reference | 0..1 | (Choice) | Element | cds | Trial-Use: FMM1 | Added: |
| cqf-relativeDateTime | 0..1 | (complex) | Element | cds | Deprecated: FMM3 | Changed: |
| diagnosticReport-focus | 0..* | Reference | DiagnosticReport | oo | Experimental
Draft: FMM0 | Changed: |
| event-basedOn | 0..* | Reference | Condition, ChargeItem, ClinicalImpression, Composition, Consent, Coverage,
DetectedIssue, EpisodeOfCare, ExplanationOfBenefit, FamilyMemberHistory,
ImmunizationEvaluation, InventoryReport, MedicationStatement, PaymentNotice,
PaymentReconciliation | fhir | Trial-Use: FMM3 | n/c |
| event-partOf | 0..* | Reference | DiagnosticReport, Condition | fhir | Trial-Use: FMM3 | n/c |
| flag-detail | 0..* | Reference | Flag | pc | Trial-Use: FMM3 | Changed: |
| patient-sexParameterForClinicalUse | 0..* | (complex) | Resource | pa | Experimental
Draft: FMM1 | Changed: |
| 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 | fhir | Trial-Use: FMM3 | n/c |
| request-replaces | 0..* | Reference | NutritionOrder, SupplyRequest, Task | fhir | Trial-Use: FMM3 | n/c |
| workflow-barrier | 0..* | CodeableReference | Goal, CommunicationRequest, CarePlan.activity | fhir | Trial-Use: FMM2 | n/c |
| workflow-protectiveFactor | 0..* | CodeableReference | Goal, CommunicationRequest, CarePlan.activity | fhir | Trial-Use: FMM2 | n/c |
| workflow-supportingInfo | 0..* | Reference | DiagnosticReport, DocumentReference, Encounter, Observation, CommunicationRequest | fhir | Trial-Use: FMM3 | n/c |
This table lists search parameters defined for any of the extensions listed above in association with the core specification.
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