> ## Documentation Index > Fetch the complete documentation index at: https://docs.metriport.com/llms.txt > Use this file to discover all available pages before exploring further. # Task > A task to be performed. ## Properties | Name | Required | Type | Description | | --------------------- | -------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------- | | identifier | No | [Identifier](/medical-api/fhir/data-types/identifier)\[] | Task Instance Identifier | | instantiatesCanonical | No | canonical | Formal definition of task | | instantiatesUri | No | uri | Formal definition of task | | basedOn | No | Reference\\[] | Request fulfilled by this task | | groupIdentifier | No | [Identifier](/medical-api/fhir/data-types/identifier) | Requisition or grouper id | | partOf | No | Reference\<[Task](/medical-api/fhir/resources/task)>\[] | Composite task | | status | Yes | code | draft / requested / received / accepted / + | | statusReason | No | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept) | Reason for current status | | businessStatus | No | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept) | E.g. "Specimen collected", "IV prepped" | | intent | Yes | code | unknown / proposal / plan / order / original-order / reflex-order / filler-order / instance-order / option | | priority | No | code | routine / urgent / asap / stat | | code | No | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept) | Task Type | | description | No | string | Human-readable explanation of task | | focus | No | Reference\ | What task is acting on | | for | No | Reference\ | Beneficiary of the Task | | encounter | No | Reference\<[Encounter](/medical-api/fhir/resources/encounter)> | Healthcare event during which this task originated | | executionPeriod | No | [Period](/medical-api/fhir/data-types/period) | Start and end time of execution | | authoredOn | No | dateTime | Task Creation Date | | lastModified | No | dateTime | Task Last Modified Date | | requester | No | Reference\<[Device](/medical-api/fhir/resources/device) / [Organization](/medical-api/fhir/resources/organization) / [Patient](/medical-api/fhir/resources/patient) / [Practitioner](/medical-api/fhir/resources/practitioner) / [PractitionerRole](/medical-api/fhir/resources/practitionerrole) / [RelatedPerson](/medical-api/fhir/resources/relatedperson)> | Who is asking for task to be done | | performerType | No | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept)\[] | Requested performer | | owner | No | Reference\<[Practitioner](/medical-api/fhir/resources/practitioner) / [PractitionerRole](/medical-api/fhir/resources/practitionerrole) / [Organization](/medical-api/fhir/resources/organization) / [CareTeam](/medical-api/fhir/resources/careteam) / [HealthcareService](/medical-api/fhir/resources/healthcareservice) / [Patient](/medical-api/fhir/resources/patient) / [Device](/medical-api/fhir/resources/device) / [RelatedPerson](/medical-api/fhir/resources/relatedperson)> | Responsible individual | | location | No | Reference\<[Location](/medical-api/fhir/resources/location)> | Where task occurs | | reasonCode | No | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept) | Why task is needed | | reasonReference | No | Reference\ | Why task is needed | | insurance | No | Reference\<[Coverage](/medical-api/fhir/resources/coverage) / [ClaimResponse](/medical-api/fhir/resources/claimresponse)>\[] | Associated insurance coverage | | note | No | [Annotation](/medical-api/fhir/data-types/annotation)\[] | Comments made about the task | | relevantHistory | No | Reference\<[Provenance](/medical-api/fhir/resources/provenance)>\[] | Key events in history of the Task | | restriction | No | TaskRestriction | Constraints on fulfillment tasks | | - id | No | string | Unique id for inter-element referencing | | - extension | No | [Extension](/medical-api/fhir/data-types/extension)\[] | Additional content defined by implementations | | - modifierExtension | No | [Extension](/medical-api/fhir/data-types/extension)\[] | Extensions that cannot be ignored even if unrecognized | | - repetitions | No | positiveInt | How many times to repeat | | - period | No | [Period](/medical-api/fhir/data-types/period) | When fulfillment sought | | - recipient | No | Reference\<[Patient](/medical-api/fhir/resources/patient) / [Practitioner](/medical-api/fhir/resources/practitioner) / [PractitionerRole](/medical-api/fhir/resources/practitionerrole) / [RelatedPerson](/medical-api/fhir/resources/relatedperson) / [Group](/medical-api/fhir/resources/group) / [Organization](/medical-api/fhir/resources/organization)>\[] | For whom is fulfillment sought? | | input | No | TaskInput | Information used to perform task | | - id | No | string | Unique id for inter-element referencing | | - extension | No | [Extension](/medical-api/fhir/data-types/extension)\[] | Additional content defined by implementations | | - modifierExtension | No | [Extension](/medical-api/fhir/data-types/extension)\[] | Extensions that cannot be ignored even if unrecognized | | - type | Yes | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept) | Label for the input | | - value\[x] | Yes | base64Binary, boolean, canonical, code, date, dateTime, decimal, id, instant, integer, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, [Address](/medical-api/fhir/data-types/address), [Age](/medical-api/fhir/data-types/age), [Annotation](/medical-api/fhir/data-types/annotation), [Attachment](/medical-api/fhir/data-types/attachment), [CodeableConcept](/medical-api/fhir/data-types/codeableconcept), [Coding](/medical-api/fhir/data-types/coding), [ContactPoint](/medical-api/fhir/data-types/contactpoint), [Count](/medical-api/fhir/data-types/count), [Distance](/medical-api/fhir/data-types/distance), [Duration](/medical-api/fhir/data-types/duration), [HumanName](/medical-api/fhir/data-types/humanname), [Identifier](/medical-api/fhir/data-types/identifier), [Money](/medical-api/fhir/data-types/money), [Period](/medical-api/fhir/data-types/period), [Quantity](/medical-api/fhir/data-types/quantity), [Range](/medical-api/fhir/data-types/range), [Ratio](/medical-api/fhir/data-types/ratio), Reference\<>, [SampledData](/medical-api/fhir/data-types/sampleddata), [Signature](/medical-api/fhir/data-types/signature), [Timing](/medical-api/fhir/data-types/timing), [ContactDetail](/medical-api/fhir/data-types/contactdetail), [Contributor](/medical-api/fhir/data-types/contributor), [DataRequirement](/medical-api/fhir/data-types/datarequirement), [Expression](/medical-api/fhir/data-types/expression), [ParameterDefinition](/medical-api/fhir/data-types/parameterdefinition), [RelatedArtifact](/medical-api/fhir/data-types/relatedartifact), [TriggerDefinition](/medical-api/fhir/data-types/triggerdefinition), [UsageContext](/medical-api/fhir/data-types/usagecontext), [Dosage](/medical-api/fhir/data-types/dosage), [Meta](/medical-api/fhir/data-types/meta) | Content to use in performing the task | | output | No | TaskOutput | Information produced as part of task | | - id | No | string | Unique id for inter-element referencing | | - extension | No | [Extension](/medical-api/fhir/data-types/extension)\[] | Additional content defined by implementations | | - modifierExtension | No | [Extension](/medical-api/fhir/data-types/extension)\[] | Extensions that cannot be ignored even if unrecognized | | - type | Yes | [CodeableConcept](/medical-api/fhir/data-types/codeableconcept) | Label for output | | - value\[x] | Yes | base64Binary, boolean, canonical, code, date, dateTime, decimal, id, instant, integer, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, [Address](/medical-api/fhir/data-types/address), [Age](/medical-api/fhir/data-types/age), [Annotation](/medical-api/fhir/data-types/annotation), [Attachment](/medical-api/fhir/data-types/attachment), [CodeableConcept](/medical-api/fhir/data-types/codeableconcept), [Coding](/medical-api/fhir/data-types/coding), [ContactPoint](/medical-api/fhir/data-types/contactpoint), [Count](/medical-api/fhir/data-types/count), [Distance](/medical-api/fhir/data-types/distance), [Duration](/medical-api/fhir/data-types/duration), [HumanName](/medical-api/fhir/data-types/humanname), [Identifier](/medical-api/fhir/data-types/identifier), [Money](/medical-api/fhir/data-types/money), [Period](/medical-api/fhir/data-types/period), [Quantity](/medical-api/fhir/data-types/quantity), [Range](/medical-api/fhir/data-types/range), [Ratio](/medical-api/fhir/data-types/ratio), Reference\<>, [SampledData](/medical-api/fhir/data-types/sampleddata), [Signature](/medical-api/fhir/data-types/signature), [Timing](/medical-api/fhir/data-types/timing), [ContactDetail](/medical-api/fhir/data-types/contactdetail), [Contributor](/medical-api/fhir/data-types/contributor), [DataRequirement](/medical-api/fhir/data-types/datarequirement), [Expression](/medical-api/fhir/data-types/expression), [ParameterDefinition](/medical-api/fhir/data-types/parameterdefinition), [RelatedArtifact](/medical-api/fhir/data-types/relatedartifact), [TriggerDefinition](/medical-api/fhir/data-types/triggerdefinition), [UsageContext](/medical-api/fhir/data-types/usagecontext), [Dosage](/medical-api/fhir/data-types/dosage), [Meta](/medical-api/fhir/data-types/meta) | Result of output | ## Search Parameters | Name | Type | Description | Expression | | ---------------- | --------- | -------------------------------------------------------------------------------- | -------------------- | | authored-on | date | Search by creation date | Task.authoredOn | | based-on | reference | Search by requests this task is based on | Task.basedOn | | business-status | token | Search by business status | Task.businessStatus | | code | token | Search by task code | Task.code | | encounter | reference | Search by encounter | Task.encounter | | focus | reference | Search by task focus | Task.focus | | group-identifier | token | Search by group identifier | Task.groupIdentifier | | identifier | token | Search for a task instance by its business identifier | Task.identifier | | intent | token | Search by task intent | Task.intent | | modified | date | Search by last modification date | Task.lastModified | | owner | reference | Search by task owner | Task.owner | | part-of | reference | Search by task this task is part of | Task.partOf | | patient | reference | Search by patient | Task.for | | performer | token | Search by recommended type of performer (e.g., Requester, Performer, Scheduler). | Task.performerType | | period | date | Search by period Task is/was underway | Task.executionPeriod | | priority | token | Search by task priority | Task.priority | | requester | reference | Search by task requester | Task.requester | | status | token | Search by task status | Task.status | | subject | reference | Search by subject | Task.for | ## Inherited Properties | Name | Required | Type | Description | | ----------------- | -------- | ------------------------------------------------------ | ------------------------------------------------------ | | id | No | string | Logical id of this artifact | | meta | No | [Meta](/medical-api/fhir/data-types/meta) | Metadata about the resource | | implicitRules | No | uri | A set of rules under which this content was created | | language | No | code | Language of the resource content | | text | No | [Narrative](/medical-api/fhir/data-types/narrative) | Text summary of the resource, for human interpretation | | contained | No | Resource\[] | Contained, inline Resources | | extension | No | [Extension](/medical-api/fhir/data-types/extension)\[] | Additional content defined by implementations | | modifierExtension | No | [Extension](/medical-api/fhir/data-types/extension)\[] | Extensions that cannot be ignored | To view the FHIR specification for this resource, see [Task](https://www.hl7.org/fhir/StructureDefinition/Task).