This page is part of the FHIR Specification v6.0.0-ballot1: Release 6 Ballot (1st Draft) (see Ballot Notes ). The current version is 5.0.0 .  For a full list of available versions, see the Directory of published versions  
Search parameters for the Resource Task - Search Parameters resource. Also check the Extensions registry  for search parameters 
on extensions related to this resource.
http://hl7.org/fhir/SearchParameter/Task-actor12.1.20    actor Parameter actor:reference
Search by specific performer.
Resource Task Expression Task.performer.actorProcessing Mode Normal Target Resources Organization , CareTeam , RelatedPerson , PractitionerRole , Practitioner , Patient Multiples multipleAnd: It's up to the server whether the parameter may repeat in order to specify multiple values that must all be true multipleOr: It's up to the server whether the parameter can have multiple values (separated by comma) where at least one must be true 
  http://hl7.org/fhir/SearchParameter/Task-authored-on12.1.21    authored-on Parameter authored-on:date
Resource Task Expression Task.authoredOnProcessing Mode Normal Multiples multipleAnd: It's up to the server whether the parameter may repeat in order to specify multiple values that must all be true multipleOr: It's up to the server whether the parameter can have multiple values (separated by comma) where at least one must be true Comparators Allowed: eq, ne, gt, ge, lt, le, sa, eb, ap 
  http://hl7.org/fhir/SearchParameter/Task-based-on12.1.22    based-on Parameter based-on:reference
Search by requests this task is based on
Resource Task Expression Task.basedOnProcessing Mode Normal Target Resources Account , ActivityDefinition , ActorDefinition , AdministrableProductDefinition , AdverseEvent , AllergyIntolerance , Appointment , AppointmentResponse , ArtifactAssessment , AuditEvent , Basic , Binary , BiologicallyDerivedProduct , BiologicallyDerivedProductDispense , BodyStructure , Bundle , CapabilityStatement , CarePlan , CareTeam , ChargeItem , ChargeItemDefinition , Citation , Claim , ClaimResponse , ClinicalImpression , ClinicalUseDefinition , CodeSystem , Communication , CommunicationRequest , CompartmentDefinition , Composition , ConceptMap , Condition , ConditionDefinition , Consent , Contract , Coverage , CoverageEligibilityRequest , CoverageEligibilityResponse , DetectedIssue , Device , DeviceAssociation , DeviceDefinition , DeviceDispense , DeviceMetric , DeviceRequest , DeviceUsage , DiagnosticReport , DocumentReference , Encounter , EncounterHistory , Endpoint , EnrollmentRequest , EnrollmentResponse , EpisodeOfCare , EventDefinition , Evidence , EvidenceReport , EvidenceVariable , ExampleScenario , ExplanationOfBenefit , FamilyMemberHistory , Flag , FormularyItem , GenomicStudy , Goal , GraphDefinition , Group , GuidanceResponse , HealthcareService , ImagingSelection , ImagingStudy , Immunization , ImmunizationEvaluation , ImmunizationRecommendation , ImplementationGuide , Ingredient , InsurancePlan , InventoryItem , InventoryReport , Invoice , Library , Linkage , List , Location , ManufacturedItemDefinition , Measure , MeasureReport , Medication , MedicationAdministration , MedicationDispense , MedicationKnowledge , MedicationRequest , MedicationStatement , MedicinalProductDefinition , MessageDefinition , MessageHeader , MolecularSequence , NamingSystem , NutritionIntake , NutritionOrder , NutritionProduct , Observation , ObservationDefinition , OperationDefinition , OperationOutcome , Organization , OrganizationAffiliation , PackagedProductDefinition , Parameters , Patient , PaymentNotice , PaymentReconciliation , Permission , Person , PlanDefinition , Practitioner , PractitionerRole , Procedure , Provenance , Questionnaire , QuestionnaireResponse , RegulatedAuthorization , RelatedPerson , RequestOrchestration , Requirements , ResearchStudy , ResearchSubject , RiskAssessment , Schedule , SearchParameter , ServiceRequest , Slot , Specimen , SpecimenDefinition , StructureDefinition , StructureMap , Subscription , SubscriptionStatus , SubscriptionTopic , Substance , SubstanceDefinition , SubstanceNucleicAcid , SubstancePolymer , SubstanceProtein , SubstanceReferenceInformation , SubstanceSourceMaterial , SupplyDelivery , SupplyRequest , Task , TerminologyCapabilities , TestPlan , TestReport , TestScript , Transport , ValueSet , VerificationResult , VisionPrescription Multiples multipleAnd: It's up to the server whether the parameter may repeat in order to specify multiple values that must all be true multipleOr: It's up to the server whether the parameter can have multiple values (separated by comma) where at least one must be true 
  http://hl7.org/fhir/SearchParameter/Task-business-status12.1.23    business-status Parameter business-status:token
Search by business status
Resource Task Expression Task.businessStatusProcessing Mode Normal Multiples multipleAnd: It's up to the server whether the parameter may repeat in order to specify multiple values that must all be true multipleOr: It's up to the server whether the parameter can have multiple values (separated by comma) where at least one must be true 
  http://hl7.org/fhir/SearchParameter/clinical-codeThis search parameter is part of the common search parameter clinical-code  12.1.24    code Parameter code:token
Task : Search by task code
Resource Task Expression Task.codeProcessing Mode Normal Multiples multipleAnd: It's up to the server whether the parameter may repeat in order to specify multiple values that must all be true multipleOr: It's up to the server whether the parameter can have multiple values (separated by comma) where at least one must be true 
  http://hl7.org/fhir/SearchParameter/clinical-encounterThis search parameter is part of the common search parameter clinical-encounter  12.1.25    encounter Parameter encounter:reference
Task : Search by encounter
Resource Task Expression Task.encounterProcessing Mode Normal Target Resources Encounter Multiples multipleAnd: It's up to the server whether the parameter may repeat in order to specify multiple values that must all be true multipleOr: It's up to the server whether the parameter can have multiple values (separated by comma) where at least one must be true 
  http://hl7.org/fhir/SearchParameter/Task-focus12.1.26    focus Parameter focus:reference
Resource Task Expression Task.focusProcessing Mode Normal Target Resources Account , ActivityDefinition , ActorDefinition , AdministrableProductDefinition , AdverseEvent , AllergyIntolerance , Appointment , AppointmentResponse , ArtifactAssessment , AuditEvent , Basic , Binary , BiologicallyDerivedProduct , BiologicallyDerivedProductDispense , BodyStructure , Bundle , CapabilityStatement , CarePlan , CareTeam , ChargeItem , ChargeItemDefinition , Citation , Claim , ClaimResponse , ClinicalImpression , ClinicalUseDefinition , CodeSystem , Communication , CommunicationRequest , CompartmentDefinition , Composition , ConceptMap , Condition , ConditionDefinition , Consent , Contract , Coverage , CoverageEligibilityRequest , CoverageEligibilityResponse , DetectedIssue , Device , DeviceAssociation , DeviceDefinition , DeviceDispense , DeviceMetric , DeviceRequest , DeviceUsage , DiagnosticReport , DocumentReference , Encounter , EncounterHistory , Endpoint , EnrollmentRequest , EnrollmentResponse , EpisodeOfCare , EventDefinition , Evidence , EvidenceReport , EvidenceVariable , ExampleScenario , ExplanationOfBenefit , FamilyMemberHistory , Flag , FormularyItem , GenomicStudy , Goal , GraphDefinition , Group , GuidanceResponse , HealthcareService , ImagingSelection , ImagingStudy , Immunization , ImmunizationEvaluation , ImmunizationRecommendation , ImplementationGuide , Ingredient , InsurancePlan , InventoryItem , InventoryReport , Invoice , Library , Linkage , List , Location , ManufacturedItemDefinition , Measure , MeasureReport , Medication , MedicationAdministration , MedicationDispense , MedicationKnowledge , MedicationRequest , MedicationStatement , MedicinalProductDefinition , MessageDefinition , MessageHeader , MolecularSequence , NamingSystem , NutritionIntake , NutritionOrder , NutritionProduct , Observation , ObservationDefinition , OperationDefinition , OperationOutcome , Organization , OrganizationAffiliation , PackagedProductDefinition , Parameters , Patient , PaymentNotice , PaymentReconciliation , Permission , Person , PlanDefinition , Practitioner , PractitionerRole , Procedure , Provenance , Questionnaire , QuestionnaireResponse , RegulatedAuthorization , RelatedPerson , RequestOrchestration , Requirements , ResearchStudy , ResearchSubject , RiskAssessment , Schedule , SearchParameter , ServiceRequest , Slot , Specimen , SpecimenDefinition , StructureDefinition , StructureMap , Subscription , SubscriptionStatus , SubscriptionTopic , Substance , SubstanceDefinition , SubstanceNucleicAcid , SubstancePolymer , SubstanceProtein , SubstanceReferenceInformation , SubstanceSourceMaterial , SupplyDelivery , SupplyRequest , Task , TerminologyCapabilities , TestPlan , TestReport , TestScript , Transport , ValueSet , VerificationResult , VisionPrescription Multiples multipleAnd: It's up to the server whether the parameter may repeat in order to specify multiple values that must all be true multipleOr: It's up to the server whether the parameter can have multiple values (separated by comma) where at least one must be true 
  http://hl7.org/fhir/SearchParameter/Task-group-identifier12.1.27    group-identifier Parameter group-identifier:token
Search by group identifier
Resource Task Expression Task.groupIdentifierProcessing Mode Normal Multiples multipleAnd: It's up to the server whether the parameter may repeat in order to specify multiple values that must all be true multipleOr: It's up to the server whether the parameter can have multiple values (separated by comma) where at least one must be true 
  http://hl7.org/fhir/SearchParameter/clinical-identifierThis search parameter is part of the common search parameter clinical-identifier  12.1.28    identifier Parameter identifier:token
Task : Search for a task instance by its business identifier
Resource Task Expression Task.identifierProcessing Mode Normal Multiples multipleAnd: It's up to the server whether the parameter may repeat in order to specify multiple values that must all be true multipleOr: It's up to the server whether the parameter can have multiple values (separated by comma) where at least one must be true 
  http://hl7.org/fhir/SearchParameter/Task-intent12.1.29    intent Parameter intent:token
Resource Task Expression Task.intentProcessing Mode Normal Multiples multipleAnd: It's up to the server whether the parameter may repeat in order to specify multiple values that must all be true multipleOr: It's up to the server whether the parameter can have multiple values (separated by comma) where at least one must be true 
  http://hl7.org/fhir/SearchParameter/Task-modified12.1.30    modified Parameter modified:date
Search by last modification date
Resource Task Expression Task.lastModifiedProcessing Mode Normal Multiples multipleAnd: It's up to the server whether the parameter may repeat in order to specify multiple values that must all be true multipleOr: It's up to the server whether the parameter can have multiple values (separated by comma) where at least one must be true Comparators Allowed: eq, ne, gt, ge, lt, le, sa, eb, ap 
  http://hl7.org/fhir/SearchParameter/Task-output12.1.31    output Parameter output:reference
Resource Task Expression Task.output.value.ofType(Reference)Processing Mode Normal Target Resources Account , ActivityDefinition , ActorDefinition , AdministrableProductDefinition , AdverseEvent , AllergyIntolerance , Appointment , AppointmentResponse , ArtifactAssessment , AuditEvent , Basic , Binary , BiologicallyDerivedProduct , BiologicallyDerivedProductDispense , BodyStructure , Bundle , CapabilityStatement , CarePlan , CareTeam , ChargeItem , ChargeItemDefinition , Citation , Claim , ClaimResponse , ClinicalImpression , ClinicalUseDefinition , CodeSystem , Communication , CommunicationRequest , CompartmentDefinition , Composition , ConceptMap , Condition , ConditionDefinition , Consent , Contract , Coverage , CoverageEligibilityRequest , CoverageEligibilityResponse , DetectedIssue , Device , DeviceAssociation , DeviceDefinition , DeviceDispense , DeviceMetric , DeviceRequest , DeviceUsage , DiagnosticReport , DocumentReference , Encounter , EncounterHistory , Endpoint , EnrollmentRequest , EnrollmentResponse , EpisodeOfCare , EventDefinition , Evidence , EvidenceReport , EvidenceVariable , ExampleScenario , ExplanationOfBenefit , FamilyMemberHistory , Flag , FormularyItem , GenomicStudy , Goal , GraphDefinition , Group , GuidanceResponse , HealthcareService , ImagingSelection , ImagingStudy , Immunization , ImmunizationEvaluation , ImmunizationRecommendation , ImplementationGuide , Ingredient , InsurancePlan , InventoryItem , InventoryReport , Invoice , Library , Linkage , List , Location , ManufacturedItemDefinition , Measure , MeasureReport , Medication , MedicationAdministration , MedicationDispense , MedicationKnowledge , MedicationRequest , MedicationStatement , MedicinalProductDefinition , MessageDefinition , MessageHeader , MolecularSequence , NamingSystem , NutritionIntake , NutritionOrder , NutritionProduct , Observation , ObservationDefinition , OperationDefinition , OperationOutcome , Organization , OrganizationAffiliation , PackagedProductDefinition , Parameters , Patient , PaymentNotice , PaymentReconciliation , Permission , Person , PlanDefinition , Practitioner , PractitionerRole , Procedure , Provenance , Questionnaire , QuestionnaireResponse , RegulatedAuthorization , RelatedPerson , RequestOrchestration , Requirements , ResearchStudy , ResearchSubject , RiskAssessment , Schedule , SearchParameter , ServiceRequest , Slot , Specimen , SpecimenDefinition , StructureDefinition , StructureMap , Subscription , SubscriptionStatus , SubscriptionTopic , Substance , SubstanceDefinition , SubstanceNucleicAcid , SubstancePolymer , SubstanceProtein , SubstanceReferenceInformation , SubstanceSourceMaterial , SupplyDelivery , SupplyRequest , Task , TerminologyCapabilities , TestPlan , TestReport , TestScript , Transport , ValueSet , VerificationResult , VisionPrescription Multiples multipleAnd: It's up to the server whether the parameter may repeat in order to specify multiple values that must all be true multipleOr: It's up to the server whether the parameter can have multiple values (separated by comma) where at least one must be true 
  http://hl7.org/fhir/SearchParameter/Task-owner12.1.32    owner Parameter owner:reference
Resource Task Expression Task.ownerProcessing Mode Normal Target Resources Organization , CareTeam , RelatedPerson , PractitionerRole , Practitioner , Patient Multiples multipleAnd: It's up to the server whether the parameter may repeat in order to specify multiple values that must all be true multipleOr: It's up to the server whether the parameter can have multiple values (separated by comma) where at least one must be true 
  http://hl7.org/fhir/SearchParameter/Task-part-of12.1.33    part-of Parameter part-of:reference
Search by task this task is part of
Resource Task Expression Task.partOfProcessing Mode Normal Target Resources Task Multiples multipleAnd: It's up to the server whether the parameter may repeat in order to specify multiple values that must all be true multipleOr: It's up to the server whether the parameter can have multiple values (separated by comma) where at least one must be true 
  http://hl7.org/fhir/SearchParameter/clinical-patientThis search parameter is part of the common search parameter clinical-patient  12.1.34    patient Parameter patient:reference
Resource Task Expression Task.for.where(resolve() is Patient)Processing Mode Normal Target Resources Patient Multiples multipleAnd: It's up to the server whether the parameter may repeat in order to specify multiple values that must all be true multipleOr: It's up to the server whether the parameter can have multiple values (separated by comma) where at least one must be true 
  http://hl7.org/fhir/SearchParameter/Task-performer12.1.35    performer Parameter performer:token
Search by recommended type of performer (e.g., Requester, Performer, Scheduler).
Resource Task Expression Task.requestedPerformer.conceptProcessing Mode Normal Multiples multipleAnd: It's up to the server whether the parameter may repeat in order to specify multiple values that must all be true multipleOr: It's up to the server whether the parameter can have multiple values (separated by comma) where at least one must be true 
  http://hl7.org/fhir/SearchParameter/Task-period12.1.36    period Parameter period:date
Search by period Task is/was underway
Resource Task Expression Task.executionPeriodProcessing Mode Normal Multiples multipleAnd: It's up to the server whether the parameter may repeat in order to specify multiple values that must all be true multipleOr: It's up to the server whether the parameter can have multiple values (separated by comma) where at least one must be true Comparators Allowed: eq, ne, gt, ge, lt, le, sa, eb, ap 
  http://hl7.org/fhir/SearchParameter/Task-priority12.1.37    priority Parameter priority:token
Resource Task Expression Task.priorityProcessing Mode Normal Multiples multipleAnd: It's up to the server whether the parameter may repeat in order to specify multiple values that must all be true multipleOr: It's up to the server whether the parameter can have multiple values (separated by comma) where at least one must be true 
  http://hl7.org/fhir/SearchParameter/Task-requestedperformer-reference12.1.38    requestedperformer-reference Parameter requestedperformer-reference:reference
Search by specific requested performer.
  http://hl7.org/fhir/SearchParameter/Task-requester12.1.39    requester Parameter requester:reference
Resource Task Expression Task.requesterProcessing Mode Normal Target Resources Device , Organization , RelatedPerson , PractitionerRole , Practitioner , Patient Multiples multipleAnd: It's up to the server whether the parameter may repeat in order to specify multiple values that must all be true multipleOr: It's up to the server whether the parameter can have multiple values (separated by comma) where at least one must be true 
  http://hl7.org/fhir/SearchParameter/Task-status12.1.40    status Parameter status:token
Resource Task Expression Task.statusProcessing Mode Normal Multiples multipleAnd: It's up to the server whether the parameter may repeat in order to specify multiple values that must all be true multipleOr: It's up to the server whether the parameter can have multiple values (separated by comma) where at least one must be true 
  http://hl7.org/fhir/SearchParameter/Task-subject12.1.41    subject Parameter subject:reference
Resource Task Expression Task.forProcessing Mode Normal Target Resources Account , ActivityDefinition , ActorDefinition , AdministrableProductDefinition , AdverseEvent , AllergyIntolerance , Appointment , AppointmentResponse , ArtifactAssessment , AuditEvent , Basic , Binary , BiologicallyDerivedProduct , BiologicallyDerivedProductDispense , BodyStructure , Bundle , CapabilityStatement , CarePlan , CareTeam , ChargeItem , ChargeItemDefinition , Citation , Claim , ClaimResponse , ClinicalImpression , ClinicalUseDefinition , CodeSystem , Communication , CommunicationRequest , CompartmentDefinition , Composition , ConceptMap , Condition , ConditionDefinition , Consent , Contract , Coverage , CoverageEligibilityRequest , CoverageEligibilityResponse , DetectedIssue , Device , DeviceAssociation , DeviceDefinition , DeviceDispense , DeviceMetric , DeviceRequest , DeviceUsage , DiagnosticReport , DocumentReference , Encounter , EncounterHistory , Endpoint , EnrollmentRequest , EnrollmentResponse , EpisodeOfCare , EventDefinition , Evidence , EvidenceReport , EvidenceVariable , ExampleScenario , ExplanationOfBenefit , FamilyMemberHistory , Flag , FormularyItem , GenomicStudy , Goal , GraphDefinition , Group , GuidanceResponse , HealthcareService , ImagingSelection , ImagingStudy , Immunization , ImmunizationEvaluation , ImmunizationRecommendation , ImplementationGuide , Ingredient , InsurancePlan , InventoryItem , InventoryReport , Invoice , Library , Linkage , List , Location , ManufacturedItemDefinition , Measure , MeasureReport , Medication , MedicationAdministration , MedicationDispense , MedicationKnowledge , MedicationRequest , MedicationStatement , MedicinalProductDefinition , MessageDefinition , MessageHeader , MolecularSequence , NamingSystem , NutritionIntake , NutritionOrder , NutritionProduct , Observation , ObservationDefinition , OperationDefinition , OperationOutcome , Organization , OrganizationAffiliation , PackagedProductDefinition , Parameters , Patient , PaymentNotice , PaymentReconciliation , Permission , Person , PlanDefinition , Practitioner , PractitionerRole , Procedure , Provenance , Questionnaire , QuestionnaireResponse , RegulatedAuthorization , RelatedPerson , RequestOrchestration , Requirements , ResearchStudy , ResearchSubject , RiskAssessment , Schedule , SearchParameter , ServiceRequest , Slot , Specimen , SpecimenDefinition , StructureDefinition , StructureMap , Subscription , SubscriptionStatus , SubscriptionTopic , Substance , SubstanceDefinition , SubstanceNucleicAcid , SubstancePolymer , SubstanceProtein , SubstanceReferenceInformation , SubstanceSourceMaterial , SupplyDelivery , SupplyRequest , Task , TerminologyCapabilities , TestPlan , TestReport , TestScript , Transport , ValueSet , VerificationResult , VisionPrescription Multiples multipleAnd: It's up to the server whether the parameter may repeat in order to specify multiple values that must all be true multipleOr: It's up to the server whether the parameter can have multiple values (separated by comma) where at least one must be true