FHIR Imaging ServiceRequest Profile IG
0.1.0 - ci-build International flag

FHIR Imaging ServiceRequest Profile IG, published by HL7 International / Imaging Integration. This guide is not an authorized publication; it is the continuous build for version 0.1.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7/imaging-service-request-ig/ and changes regularly. See the Directory of published versions

Resource Profile: ImagingScheduledProcedureStepProfile - Detailed Descriptions

Draft as of 2025-03-26

Definitions for the imaging-scheduled-procedure-step resource profile.

Guidance on how to interpret the contents of this table can be found here

0. Task
Definition

A task to be performed as a part of a workflow and the related informations like inputs, outputs and execution progress. While very simple workflows can be implemented with Request alone, most workflows would require a Task (explicit or contained) as a means to track the execution data (i.e. inputs, outputs, status). Please refer to the workflow page for more details.

ShortA task to be performed
Control0..*
Is Modifierfalse
Must Supportfalse
Summaryfalse
Invariantsdom-2: If the resource is contained in another resource, it SHALL NOT contain nested Resources (contained.contained.empty())
dom-3: If the resource is contained in another resource, it SHALL be referred to from elsewhere in the resource or SHALL refer to the containing resource (contained.where((('#'+id in (%resource.descendants().reference | %resource.descendants().ofType(canonical) | %resource.descendants().ofType(uri) | %resource.descendants().ofType(url))) or descendants().where(reference = '#').exists() or descendants().where(ofType(canonical) = '#').exists() or descendants().where(ofType(canonical) = '#').exists()).not()).trace('unmatched', id).empty())
dom-4: If a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated (contained.meta.versionId.empty() and contained.meta.lastUpdated.empty())
dom-5: If a resource is contained in another resource, it SHALL NOT have a security label (contained.meta.security.empty())
dom-6: A resource should have narrative for robust management (text.`div`.exists())
inv-1: Last modified date must be greater than or equal to authored-on date. (lastModified.exists().not() or authoredOn.exists().not() or lastModified >= authoredOn)
tsk-1: Task.restriction is only allowed if the Task is seeking fulfillment and a focus is specified. (restriction.exists() implies code.coding.where(code='fulfill' and system='http://hl7.org/fhir/CodeSystem/task-code').exists() and focus.exists())
2. Task.implicitRules
Definition

A reference to a set of rules that were followed when the resource was constructed, and which must be understood when processing the content. Often, this is a reference to an implementation guide that defines the special rules along with other profiles etc.

ShortA set of rules under which this content was created
Comments

Asserting this rule set restricts the content to be only understood by a limited set of trading partners. This inherently limits the usefulness of the data in the long term. However, the existing health eco-system is highly fractured, and not yet ready to define, collect, and exchange data in a generally computable sense. Wherever possible, implementers and/or specification writers should avoid using this element. Often, when used, the URL is a reference to an implementation guide that defines these special rules as part of its narrative along with other profiles, value sets, etc.

Control0..1
Typeuri
Is Modifiertrue because This element is labeled as a modifier because the implicit rules may provide additional knowledge about the resource that modifies its meaning or interpretation
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Must Supportfalse
Summarytrue
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
4. Task.contained
Definition

These resources do not have an independent existence apart from the resource that contains them - they cannot be identified independently, nor can they have their own independent transaction scope. This is allowed to be a Parameters resource if and only if it is referenced by a resource that provides context/meaning.

ShortContained, inline Resources
Comments

This should never be done when the content can be identified properly, as once identification is lost, it is extremely difficult (and context dependent) to restore it again. Contained resources may have profiles and tags in their meta elements, but SHALL NOT have security labels.

Control0..*
This element is affected by the following invariants: dom-2, dom-4, dom-3, dom-5
TypeResource
Is Modifierfalse
Must Supportfalse
Summaryfalse
Alternate Namesinline resources, anonymous resources, contained resources
6. Task.modifierExtension
Definition

May be used to represent additional information that is not part of the basic definition of the resource and that modifies the understanding of the element that contains it and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

ShortExtensions that cannot be ignored
Comments

There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

Control0..*
TypeExtension
Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the resource that contains them
Must Supportfalse
Summarytrue
Requirements

Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

Alternate Namesextensions, user content
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
8. Task.basedOn
Definition

BasedOn refers to a higher-level authorization that triggered the creation of the task. It references a "request" resource such as a ServiceRequest, MedicationRequest, CarePlan, etc. which is distinct from the "request" resource the task is seeking to fulfill. This latter resource is referenced by focus. For example, based on a CarePlan (= basedOn), a task is created to fulfill a ServiceRequest ( = focus ) to collect a specimen from a patient.

ShortRequest fulfilled by this task
Comments

Task.basedOn is never the same as Task.focus. Task.basedOn will typically not be present for 'please fulfill' Tasks as a distinct authorization is rarely needed to request fulfillment. If the Task is seeking fulfillment of an order, the order to be fulfilled is always communicated using focus, never basedOn. However, authorization may be needed to perform other types of Task actions. As an example of when both would be present, a Task seeking suspension of a prescription might have a Task.basedOn pointing to the ServiceRequest ordering surgery (which is the driver for suspending the MedicationRequest - which would be the Task.focus).

Control10..*
TypeReference(Resource)
Is Modifierfalse
Must Supportfalse
Summarytrue
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
SlicingThis element introduces a set of slices on Task.basedOn. The slices areUnordered and Open, and can be differentiated using the following discriminators:
  • type @ reference
  • 10. Task.basedOn:requestedProcedureRef
    Slice NamerequestedProcedureRef
    Definition

    BasedOn refers to a higher-level authorization that triggered the creation of the task. It references a "request" resource such as a ServiceRequest, MedicationRequest, CarePlan, etc. which is distinct from the "request" resource the task is seeking to fulfill. This latter resource is referenced by focus. For example, based on a CarePlan (= basedOn), a task is created to fulfill a ServiceRequest ( = focus ) to collect a specimen from a patient.

    ShortRequest fulfilled by this task
    Comments

    Task.basedOn is never the same as Task.focus. Task.basedOn will typically not be present for 'please fulfill' Tasks as a distinct authorization is rarely needed to request fulfillment. If the Task is seeking fulfillment of an order, the order to be fulfilled is always communicated using focus, never basedOn. However, authorization may be needed to perform other types of Task actions. As an example of when both would be present, a Task seeking suspension of a prescription might have a Task.basedOn pointing to the ServiceRequest ordering surgery (which is the driver for suspending the MedicationRequest - which would be the Task.focus).

    Control10..1*
    TypeReference(ServiceRequest - DICOM MWL Requested Procedure Mapping, Resource)
    Is Modifierfalse
    Must Supportfalse
    Summarytrue
    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
    12. Task.status
    Definition

    The current status of the task.

    Shortdraft | requested | received | accepted | +
    Control1..1
    BindingThe codes SHALL be taken from TaskStatushttp://hl7.org/fhir/ValueSet/task-status|6.0.0-ballot2
    (required to http://hl7.org/fhir/ValueSet/task-status|6.0.0-ballot2)

    The current status of the task.

    Typecode
    Is Modifiertrue because This element is labeled as a modifier because it is a status element that contains status entered-in-error which means that the resource should not be treated as valid
    Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
    Must Supportfalse
    Summarytrue
    Requirements

    These states enable coordination of task status with off-the-shelf workflow solutions that support automation of tasks.

    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
    14. Task.intent
    Definition

    Indicates the "level" of actionability associated with the Task, i.e. i+R[9]Cs this a proposed task, a planned task, an actionable task, etc.

    Shortunknown | proposal | plan | order | original-order | reflex-order | filler-order | instance-order | option
    Comments

    This element is immutable. Proposed tasks, planned tasks, etc. must be distinct instances.

    In most cases, Tasks will have an intent of "order".

    Control1..1
    BindingThe codes SHALL be taken from TaskIntenthttp://hl7.org/fhir/ValueSet/task-intent|6.0.0-ballot2
    (required to http://hl7.org/fhir/ValueSet/task-intent|6.0.0-ballot2)

    Distinguishes whether the task is a proposal, plan or full order.

    Typecode
    Is Modifierfalse
    Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
    Must Supportfalse
    Summarytrue
    Pattern Valueplan
    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
    16. Task.doNotPerform
    Definition

    If true indicates that the Task is asking for the specified action to not occur.

    ShortTrue if Task is prohibiting action
    Comments

    The attributes provided with the Task qualify what is not to be done. For example, if a requestedPeriod is provided, the 'do not' request only applies within the specified time. If a requestedPerformer is specified then the 'do not' request only applies to performers of that type. Qualifiers include: code, subject, occurrence, requestedPerformer and performer.

    In some cases, the Request.code may pre-coordinate prohibition into the requested action. E.g. 'NPO' (nothing by mouth), 'DNR' (do not recussitate). If this happens, doNotPerform SHALL NOT be set to true. I.e. The resource shall not have double negation. (E.g. 'Do not DNR').

    doNotPerform should ONLY be used with Tasks that are tightly bounded in time or process phase. E.g. 'Do not fulfill the midnight dose of medication X tonight due to the early morning scheduled procedure, where the nurse could reasonably check off 'Med X not given at midnight as instructed'. Similarly, a decision support proposal that a patient should not be given a standard intake questionnaire (because the patient is cognitively impaired) would be marked as 'complete' or 'rejected' when the clinician preps the CarePlan or order set after reviewing the decision support results. If there is a need to create a standing order to not do something that can't be satisfied by a single 'non-action', but rather an ongoing refusal to perform the function, MedicationRequest, ServiceRequest or some other form of authorization should be used.

    Control0..1
    Typeboolean
    Is Modifiertrue because If true, this element negates the Task. For example, instead of a request to perform a task, it is a request _not_ to perform a task.
    Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
    Must Supportfalse
    Summarytrue
    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
    18. Task.code
    Definition

    A name or code (or both) briefly describing what the task involves.

    ShortTask Type
    Control10..1
    This element is affected by the following invariants: tsk-1
    BindingFor example codes, see TaskCodehttp://hl7.org/fhir/ValueSet/task-code
    (example to http://hl7.org/fhir/ValueSet/task-code)

    Codes to identify what the task involves. These will typically be specific to a particular workflow.

    TypeCodeableConcept
    Is Modifierfalse
    Must Supportfalse
    Summarytrue
    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
    20. Task.code.coding
    Definition

    A reference to a code defined by a terminology system.

    ShortScheduled Protocol Code Sequence (0040,0008)Code defined by a terminology system
    Comments

    Codes may be defined very casually in enumerations, or code lists, up to very formal definitions such as SNOMED CT - see the HL7 v3 Core Principles for more information. Ordering of codings is undefined and SHALL NOT be used to infer meaning. Generally, at most only one of the coding values will be labeled as UserSelected = true.

    Control0..*
    TypeCoding
    Is Modifierfalse
    Summaryfalse
    Requirements

    Allows for alternative encodings within a code system, and translations to other code systems.

    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
    22. Task.code.text
    Definition

    A human language representation of the concept as seen/selected/uttered by the user who entered the data and/or which represents the intended meaning of the user.

    ShortScheduled Procedure Step Description (0040,0007)Plain text representation of the concept
    Comments

    Very often the text is the same as a displayName of one of the codings.

    Control0..1
    Typestring
    Is Modifierfalse
    Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
    Summaryfalse
    Requirements

    The codes from the terminologies do not always capture the correct meaning with all the nuances of the human using them, or sometimes there is no appropriate code at all. In these cases, the text is used to capture the full meaning of the source.

    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
    24. Task.for
    Definition

    The entity who benefits from the performance of the service specified in the task (e.g., the patient).

    ShortBeneficiary of the Task
    Control0..1
    TypeReference(Patient - DICOM MWL Patient Mapping, Resource)
    Is Modifierfalse
    Must Supportfalse
    Summarytrue
    Requirements

    Used to track tasks outstanding for a beneficiary. Do not use to track the task owner or creator (see owner and creator respectively). This can also affect access control.

    Alternate NamesPatient
    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
    26. Task.encounter
    Definition

    The healthcare event (e.g. a patient and healthcare provider interaction) during which this task was created.

    ShortHealthcare event during which this task originated
    Control0..1
    TypeReference(Encounter - DICOM MWL Visit Mapping, Encounter)
    Is Modifierfalse
    Must Supportfalse
    Summarytrue
    Requirements

    For some tasks it may be important to know the link between the encounter the task originated within.

    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
    28. Task.requestedPeriod
    Definition

    Indicates the start and/or end of the period of time when completion of the task is desired to take place.

    ShortScheduled Procedure Step Start Date / Scheduled Procedure Step Start TimeWhen the task should be performed
    Comments

    This is typically used when the Task is not seeking fulfillment of a focus Request, as in that case the period would be specified on the Request and/or in the Task.restriction.period. Instead, it is used for stand-alone tasks.

    Control10..1
    TypePeriod
    Is Modifierfalse
    Must Supportfalse
    Summarytrue
    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
    30. Task.requestedPerformer
    Definition

    The kind of participant or specific participant that should perform the task.

    ShortWho should perform Task
    Control10..*
    BindingThe codes SHOULD be taken from ProcedurePerformerRoleCodeshttp://hl7.org/fhir/ValueSet/performer-role
    (preferred to http://hl7.org/fhir/ValueSet/performer-role)

    The type(s) of task performers allowed.

    TypeCodeableReference(Practitioner, PractitionerRole, Organization, CareTeam, HealthcareService, Patient, Device, RelatedPerson)
    Is Modifierfalse
    Must Supportfalse
    Summaryfalse
    Requirements

    Use to distinguish tasks on different activity queues.

    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
    SlicingThis element introduces a set of slices on Task.requestedPerformer. The slices areUnordered and Open, and can be differentiated using the following discriminators:
    • value @ reference
    • 32. Task.requestedPerformer:scheduledStation
      Slice NamescheduledStation
      Definition

      The kind of participant or specific participant that should perform the task.

      ShortWho should perform Task
      Control10..1*
      BindingThe codes SHOULD be taken from ProcedurePerformerRoleCodeshttp://hl7.org/fhir/ValueSet/performer-role
      (preferred to http://hl7.org/fhir/ValueSet/performer-role)

      The type(s) of task performers allowed.

      TypeCodeableReference(Device - DICOM Scheduled Station Mapping, Practitioner, PractitionerRole, Organization, CareTeam, HealthcareService, Patient, Device, RelatedPerson)
      Is Modifierfalse
      Must Supportfalse
      Summaryfalse
      Requirements

      Use to distinguish tasks on different activity queues.

      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      34. Task.input
      Definition

      Additional information that may be needed in the execution of the task.

      ShortInformation used to perform task
      Control10..*
      TypeBackboneElement
      Is Modifierfalse
      Must Supportfalse
      Summaryfalse
      Requirements

      Resources and data used to perform the task. This data is used in the business logic of task execution, and is stored separately because it varies between workflows.

      Alternate NamesSupporting Information
      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
      SlicingThis element introduces a set of slices on Task.input. The slices areUnordered and Open, and can be differentiated using the following discriminators:
      • value @ type
      • 36. Task.input.modifierExtension
        Definition

        May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

        Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

        ShortExtensions that cannot be ignored even if unrecognized
        Comments

        There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

        Control0..*
        TypeExtension
        Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
        Summarytrue
        Requirements

        Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

        Alternate Namesextensions, user content, modifiers
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        38. Task.input.type
        Definition

        A code or description indicating how the input is intended to be used as part of the task execution.

        ShortLabel for the input
        Comments

        If referencing a BPMN workflow or Protocol, the "system" is the URL for the workflow definition and the code is the "name" of the required input.

        Control1..1
        Binding

        Codes to identify types of input parameters. These will typically be specific to a particular workflow. E.g. "Comparison source", "Applicable consent", "Concomitent Medications", etc.

        TypeCodeableConcept
        Is Modifierfalse
        Must Supportfalse
        Summaryfalse
        Requirements

        Inputs are named to enable task automation to bind data and pass it from one task to the next.

        Alternate NamesName
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        40. Task.input.value[x]
        Definition

        The value of the input parameter as a basic type.

        ShortContent to use in performing the task
        Control1..1
        TypeChoice of: base64Binary, boolean, canonical, code, date, dateTime, decimal, id, instant, integer, integer64, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, Address, Age, Annotation, Attachment, CodeableConcept, CodeableReference, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, RatioRange, Reference, SampledData, Signature, Timing, ContactDetail, DataRequirement, Expression, ParameterDefinition, RelatedArtifact, TriggerDefinition, UsageContext, Availability, ExtendedContactDetail, Dosage, Meta
        [x] NoteSeeChoice of Data Typesfor further information about how to use [x]
        Is Modifierfalse
        Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
        Must Supportfalse
        Summaryfalse
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        42. Task.input:modality
        Slice Namemodality
        Definition

        Additional information that may be needed in the execution of the task.

        ShortInformation used to perform task
        Control10..1*
        TypeBackboneElement
        Is Modifierfalse
        Must Supportfalse
        Summaryfalse
        Requirements

        Resources and data used to perform the task. This data is used in the business logic of task execution, and is stored separately because it varies between workflows.

        Alternate NamesSupporting Information
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        44. Task.input:modality.modifierExtension
        Definition

        May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

        Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

        ShortExtensions that cannot be ignored even if unrecognized
        Comments

        There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

        Control0..*
        TypeExtension
        Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
        Summarytrue
        Requirements

        Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

        Alternate Namesextensions, user content, modifiers
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        46. Task.input:modality.type
        Definition

        A code or description indicating how the input is intended to be used as part of the task execution.

        ShortLabel for the input
        Comments

        If referencing a BPMN workflow or Protocol, the "system" is the URL for the workflow definition and the code is the "name" of the required input.

        Control1..1
        Binding

        Codes to identify types of input parameters. These will typically be specific to a particular workflow. E.g. "Comparison source", "Applicable consent", "Concomitent Medications", etc.

        TypeCodeableConcept
        Is Modifierfalse
        Must Supportfalse
        Summaryfalse
        Requirements

        Inputs are named to enable task automation to bind data and pass it from one task to the next.

        Alternate NamesName
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        48. Task.input:modality.value[x]
        Definition

        The value of the input parameter as a basic type.

        ShortContent to use in performing the task
        Control1..1
        TypeChoice of: base64Binary, boolean, canonical, code, date, dateTime, decimal, id, instant, integer, integer64, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, Address, Age, Annotation, Attachment, CodeableConcept, CodeableReference, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, RatioRange, Reference, SampledData, Signature, Timing, ContactDetail, DataRequirement, Expression, ParameterDefinition, RelatedArtifact, TriggerDefinition, UsageContext, Availability, ExtendedContactDetail, Dosage, Meta
        [x] NoteSeeChoice of Data Typesfor further information about how to use [x]
        Is Modifierfalse
        Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
        Must Supportfalse
        Summaryfalse
        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
        SlicingThis element introduces a set of slices on Task.input.value[x]. The slices areUnordered and Open, and can be differentiated using the following discriminators:
        • type @ $this
        • 50. Task.input:modality.value[x]:valueCodeableConcept
          Slice NamevalueCodeableConcept
          Definition

          The value of the input parameter as a basic type.

          ShortContent to use in performing the task
          Control01..1
          BindingThe codes SHALL be taken from For codes, see ftp://medical.nema.org/medical/dicom/resources/valuesets/fhir/json/ValueSet-dicom-cid-33-Modality
          (required to ftp://medical.nema.org/medical/dicom/resources/valuesets/fhir/json/ValueSet-dicom-cid-33-Modality)
          TypeCodeableConcept, date, Meta, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Availability, integer64, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, ExtendedContactDetail, ParameterDefinition, dateTime, code, string, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
          [x] NoteSeeChoice of Data Typesfor further information about how to use [x]
          Is Modifierfalse
          Must Supportfalse
          Summaryfalse
          Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))

          Guidance on how to interpret the contents of this table can be found here

          0. Task
          2. Task.basedOn
          Control1..?
          SlicingThis element introduces a set of slices on Task.basedOn. The slices areUnordered and Open, and can be differentiated using the following discriminators:
          • type @ reference
          • 4. Task.basedOn:requestedProcedureRef
            Slice NamerequestedProcedureRef
            Control1..1
            TypeReference(ServiceRequest - DICOM MWL Requested Procedure Mapping)
            6. Task.intent
            Pattern Valueplan
            8. Task.code
            Control1..?
            10. Task.code.coding
            ShortScheduled Protocol Code Sequence (0040,0008)
            12. Task.code.text
            ShortScheduled Procedure Step Description (0040,0007)
            14. Task.for
            TypeReference(Patient - DICOM MWL Patient Mapping)
            16. Task.encounter
            TypeReference(Encounter - DICOM MWL Visit Mapping)
            18. Task.requestedPeriod
            ShortScheduled Procedure Step Start Date / Scheduled Procedure Step Start Time
            Control1..?
            20. Task.requestedPerformer
            Control1..?
            SlicingThis element introduces a set of slices on Task.requestedPerformer. The slices areUnordered and Open, and can be differentiated using the following discriminators:
            • value @ reference
            • 22. Task.requestedPerformer:scheduledStation
              Slice NamescheduledStation
              Control1..1
              TypeCodeableReference(Device - DICOM Scheduled Station Mapping)
              24. Task.input
              Control1..?
              SlicingThis element introduces a set of slices on Task.input. The slices areUnordered and Open, and can be differentiated using the following discriminators:
              • value @ type
              • 26. Task.input:modality
                Slice Namemodality
                Control1..1
                28. Task.input:modality.type
                30. Task.input:modality.type.coding
                32. Task.input:modality.type.coding.system
                Pattern Valuehttp://dicom.nema.org/resources/ontology/DCM
                34. Task.input:modality.value[x]
                [x] NoteSeeChoice of Data Typesfor further information about how to use [x]
                SlicingThis element introduces a set of slices on Task.input.value[x]. The slices areUnordered and Open, and can be differentiated using the following discriminators:
                • type @ $this
                • 36. Task.input:modality.value[x]:valueCodeableConcept
                  Slice NamevalueCodeableConcept
                  Control0..1
                  BindingThe codes SHALL be taken from ftp://medical.nema.org/medical/dicom/resources/valuesets/fhir/json/ValueSet-dicom-cid-33-Modality
                  (required to ftp://medical.nema.org/medical/dicom/resources/valuesets/fhir/json/ValueSet-dicom-cid-33-Modality)
                  TypeCodeableConcept
                  [x] NoteSeeChoice of Data Typesfor further information about how to use [x]

                  Guidance on how to interpret the contents of this table can be found here

                  0. Task
                  Definition

                  A task to be performed as a part of a workflow and the related informations like inputs, outputs and execution progress. While very simple workflows can be implemented with Request alone, most workflows would require a Task (explicit or contained) as a means to track the execution data (i.e. inputs, outputs, status). Please refer to the workflow page for more details.

                  ShortA task to be performed
                  Control0..*
                  Is Modifierfalse
                  Must Supportfalse
                  Summaryfalse
                  Invariantsdom-2: If the resource is contained in another resource, it SHALL NOT contain nested Resources (contained.contained.empty())
                  dom-3: If the resource is contained in another resource, it SHALL be referred to from elsewhere in the resource or SHALL refer to the containing resource (contained.where((('#'+id in (%resource.descendants().reference | %resource.descendants().ofType(canonical) | %resource.descendants().ofType(uri) | %resource.descendants().ofType(url))) or descendants().where(reference = '#').exists() or descendants().where(ofType(canonical) = '#').exists() or descendants().where(ofType(canonical) = '#').exists()).not()).trace('unmatched', id).empty())
                  dom-4: If a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated (contained.meta.versionId.empty() and contained.meta.lastUpdated.empty())
                  dom-5: If a resource is contained in another resource, it SHALL NOT have a security label (contained.meta.security.empty())
                  dom-6: A resource should have narrative for robust management (text.`div`.exists())
                  inv-1: Last modified date must be greater than or equal to authored-on date. (lastModified.exists().not() or authoredOn.exists().not() or lastModified >= authoredOn)
                  tsk-1: Task.restriction is only allowed if the Task is seeking fulfillment and a focus is specified. (restriction.exists() implies code.coding.where(code='fulfill' and system='http://hl7.org/fhir/CodeSystem/task-code').exists() and focus.exists())
                  2. Task.id
                  Definition

                  The logical id of the resource, as used in the URL for the resource. Once assigned, this value never changes.

                  ShortLogical id of this artifact
                  Comments

                  Within the context of the FHIR RESTful interactions, the resource has an id except for cases like the create and conditional update. Otherwise, the use of the resouce id depends on the given use case.

                  Control0..1
                  Typeid
                  Is Modifierfalse
                  Must Supportfalse
                  Summarytrue
                  4. Task.meta
                  Definition

                  The metadata about the resource. This is content that is maintained by the infrastructure. Changes to the content might not always be associated with version changes to the resource.

                  ShortMetadata about the resource
                  Control0..1
                  TypeMeta
                  Is Modifierfalse
                  Must Supportfalse
                  Summarytrue
                  Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                  6. Task.implicitRules
                  Definition

                  A reference to a set of rules that were followed when the resource was constructed, and which must be understood when processing the content. Often, this is a reference to an implementation guide that defines the special rules along with other profiles etc.

                  ShortA set of rules under which this content was created
                  Comments

                  Asserting this rule set restricts the content to be only understood by a limited set of trading partners. This inherently limits the usefulness of the data in the long term. However, the existing health eco-system is highly fractured, and not yet ready to define, collect, and exchange data in a generally computable sense. Wherever possible, implementers and/or specification writers should avoid using this element. Often, when used, the URL is a reference to an implementation guide that defines these special rules as part of its narrative along with other profiles, value sets, etc.

                  Control0..1
                  Typeuri
                  Is Modifiertrue because This element is labeled as a modifier because the implicit rules may provide additional knowledge about the resource that modifies its meaning or interpretation
                  Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
                  Must Supportfalse
                  Summarytrue
                  Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                  8. Task.language
                  Definition

                  The base language in which the resource is written.

                  ShortLanguage of the resource content
                  Comments

                  Language is provided to support indexing and accessibility (typically, services such as text to speech use the language tag). The html language tag in the narrative applies to the narrative. The language tag on the resource may be used to specify the language of other presentations generated from the data in the resource. Not all the content has to be in the base language. The Resource.language should not be assumed to apply to the narrative automatically. If a language is specified, it should it also be specified on the div element in the html (see rules in HTML5 for information about the relationship between xml:lang and the html lang attribute).

                  Control0..1
                  BindingThe codes SHALL be taken from AllLanguages
                  (required to http://hl7.org/fhir/ValueSet/all-languages|6.0.0-ballot2)

                  IETF language tag for a human language

                  Typecode
                  Is Modifierfalse
                  Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
                  Must Supportfalse
                  Summaryfalse
                  Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                  10. Task.text
                  Definition

                  A human-readable narrative that contains a summary of the resource and can be used to represent the content of the resource to a human. The narrative need not encode all the structured data, but is required to contain sufficient detail to make it "clinically safe" for a human to just read the narrative. Resource definitions may define what content should be represented in the narrative to ensure clinical safety.

                  ShortText summary of the resource, for human interpretation
                  Comments

                  Contained resources do not have a narrative. Resources that are not contained SHOULD have a narrative. In some cases, a resource may only have text with little or no additional discrete data (as long as all minOccurs=1 elements are satisfied). This may be necessary for data from legacy systems where information is captured as a "text blob" or where text is additionally entered raw or narrated and encoded information is added later.

                  Control0..1
                  This element is affected by the following invariants: dom-6
                  TypeNarrative
                  Is Modifierfalse
                  Must Supportfalse
                  Summaryfalse
                  Alternate Namesnarrative, html, xhtml, display
                  Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                  12. Task.contained
                  Definition

                  These resources do not have an independent existence apart from the resource that contains them - they cannot be identified independently, nor can they have their own independent transaction scope. This is allowed to be a Parameters resource if and only if it is referenced by a resource that provides context/meaning.

                  ShortContained, inline Resources
                  Comments

                  This should never be done when the content can be identified properly, as once identification is lost, it is extremely difficult (and context dependent) to restore it again. Contained resources may have profiles and tags in their meta elements, but SHALL NOT have security labels.

                  Control0..*
                  This element is affected by the following invariants: dom-2, dom-4, dom-3, dom-5
                  TypeResource
                  Is Modifierfalse
                  Must Supportfalse
                  Summaryfalse
                  Alternate Namesinline resources, anonymous resources, contained resources
                  14. Task.extension
                  Definition

                  May be used to represent additional information that is not part of the basic definition of the resource. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

                  ShortAdditional content defined by implementations
                  Comments

                  There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

                  Control0..*
                  TypeExtension
                  Is Modifierfalse
                  Must Supportfalse
                  Summaryfalse
                  Alternate Namesextensions, user content
                  Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                  16. Task.modifierExtension
                  Definition

                  May be used to represent additional information that is not part of the basic definition of the resource and that modifies the understanding of the element that contains it and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

                  Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

                  ShortExtensions that cannot be ignored
                  Comments

                  There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

                  Control0..*
                  TypeExtension
                  Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the resource that contains them
                  Must Supportfalse
                  Summarytrue
                  Requirements

                  Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

                  Alternate Namesextensions, user content
                  Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                  18. Task.identifier
                  Definition

                  The business identifier for this task.

                  ShortTask Instance Identifier
                  NoteThis is a business identifier, not a resource identifier (see discussion)
                  Control0..*
                  TypeIdentifier
                  Is Modifierfalse
                  Must Supportfalse
                  Summaryfalse
                  Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                  20. Task.instantiatesCanonical
                  Definition

                  The URL pointing to a FHIR-defined protocol, guideline, orderset or other definition that is adhered to in whole or in part by this Task.

                  ShortFormal definition of task
                  Control0..1
                  Typecanonical(ActivityDefinition)
                  Is Modifierfalse
                  Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
                  Must Supportfalse
                  Summarytrue
                  Requirements

                  Enables a formal definition of how the task is to be performed, enabling automation.

                  Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                  22. Task.instantiatesUri
                  Definition

                  The URL pointing to an externally maintained protocol, guideline, orderset or other definition that is adhered to in whole or in part by this Task.

                  ShortFormal definition of task
                  Control0..1
                  Typeuri
                  Is Modifierfalse
                  Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
                  Must Supportfalse
                  Summarytrue
                  Requirements

                  Enables a formal definition of how the task is to be performed (e.g. using BPMN, BPEL, XPDL or other formal notation to be associated with a task), enabling automation.

                  Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                  24. Task.basedOn
                  Definition

                  BasedOn refers to a higher-level authorization that triggered the creation of the task. It references a "request" resource such as a ServiceRequest, MedicationRequest, CarePlan, etc. which is distinct from the "request" resource the task is seeking to fulfill. This latter resource is referenced by focus. For example, based on a CarePlan (= basedOn), a task is created to fulfill a ServiceRequest ( = focus ) to collect a specimen from a patient.

                  ShortRequest fulfilled by this task
                  Comments

                  Task.basedOn is never the same as Task.focus. Task.basedOn will typically not be present for 'please fulfill' Tasks as a distinct authorization is rarely needed to request fulfillment. If the Task is seeking fulfillment of an order, the order to be fulfilled is always communicated using focus, never basedOn. However, authorization may be needed to perform other types of Task actions. As an example of when both would be present, a Task seeking suspension of a prescription might have a Task.basedOn pointing to the ServiceRequest ordering surgery (which is the driver for suspending the MedicationRequest - which would be the Task.focus).

                  Control1..*
                  TypeReference(Resource)
                  Is Modifierfalse
                  Must Supportfalse
                  Summarytrue
                  Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                  SlicingThis element introduces a set of slices on Task.basedOn. The slices areUnordered and Open, and can be differentiated using the following discriminators:
                  • type @ reference
                  • 26. Task.basedOn:requestedProcedureRef
                    Slice NamerequestedProcedureRef
                    Definition

                    BasedOn refers to a higher-level authorization that triggered the creation of the task. It references a "request" resource such as a ServiceRequest, MedicationRequest, CarePlan, etc. which is distinct from the "request" resource the task is seeking to fulfill. This latter resource is referenced by focus. For example, based on a CarePlan (= basedOn), a task is created to fulfill a ServiceRequest ( = focus ) to collect a specimen from a patient.

                    ShortRequest fulfilled by this task
                    Comments

                    Task.basedOn is never the same as Task.focus. Task.basedOn will typically not be present for 'please fulfill' Tasks as a distinct authorization is rarely needed to request fulfillment. If the Task is seeking fulfillment of an order, the order to be fulfilled is always communicated using focus, never basedOn. However, authorization may be needed to perform other types of Task actions. As an example of when both would be present, a Task seeking suspension of a prescription might have a Task.basedOn pointing to the ServiceRequest ordering surgery (which is the driver for suspending the MedicationRequest - which would be the Task.focus).

                    Control1..1
                    TypeReference(ServiceRequest - DICOM MWL Requested Procedure Mapping)
                    Is Modifierfalse
                    Must Supportfalse
                    Summarytrue
                    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                    28. Task.groupIdentifier
                    Definition

                    A shared identifier common to multiple independent Task and Request instances that were activated/authorized more or less simultaneously by a single author. The presence of the same identifier on each request ties those requests together and may have business ramifications in terms of reporting of results, billing, etc. E.g. a requisition number shared by a set of lab tests ordered together, or a prescription number shared by all meds ordered at one time.

                    ShortRequisition or grouper id
                    Control0..1
                    TypeIdentifier
                    Is Modifierfalse
                    Must Supportfalse
                    Summarytrue
                    Requirements

                    Billing and/or reporting can be linked to whether multiple requests were created as a single unit.

                    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                    30. Task.partOf
                    Definition

                    Task that this particular task is part of.

                    ShortComposite task
                    Comments

                    This should usually be 0..1.

                    Control0..*
                    TypeReference(Task)
                    Is Modifierfalse
                    Must Supportfalse
                    Summarytrue
                    Requirements

                    Allows tasks to be broken down into sub-steps (and this division can occur independent of the original task).

                    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                    32. Task.status
                    Definition

                    The current status of the task.

                    Shortdraft | requested | received | accepted | +
                    Control1..1
                    BindingThe codes SHALL be taken from TaskStatus
                    (required to http://hl7.org/fhir/ValueSet/task-status|6.0.0-ballot2)

                    The current status of the task.

                    Typecode
                    Is Modifiertrue because This element is labeled as a modifier because it is a status element that contains status entered-in-error which means that the resource should not be treated as valid
                    Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
                    Must Supportfalse
                    Summarytrue
                    Requirements

                    These states enable coordination of task status with off-the-shelf workflow solutions that support automation of tasks.

                    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                    34. Task.statusReason
                    Definition

                    An explanation as to why this task is held, failed, was refused, etc.

                    ShortReason for current status
                    Comments

                    This applies to the current status. Look at the history of the task to see reasons for past statuses.

                    Control0..1
                    BindingFor example codes, see TaskStatusReason
                    (example to http://hl7.org/fhir/ValueSet/task-status-reason)

                    Codes to identify the reason for current status. These will typically be specific to a particular workflow.

                    TypeCodeableReference
                    Is Modifierfalse
                    Must Supportfalse
                    Summarytrue
                    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                    36. Task.businessStatus
                    Definition

                    Contains business-specific nuances of the business state.

                    ShortE.g. "Specimen collected", "IV prepped"
                    Control0..1
                    Binding

                    The domain-specific business-contextual sub-state of the task. For example: "Blood drawn", "IV inserted", "Awaiting physician signature", etc.

                    TypeCodeableConcept
                    Is Modifierfalse
                    Must Supportfalse
                    Summarytrue
                    Requirements

                    There's often a need to track substates of a task - this is often variable by specific workflow implementation.

                    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                    38. Task.intent
                    Definition

                    Indicates the "level" of actionability associated with the Task, i.e. i+R[9]Cs this a proposed task, a planned task, an actionable task, etc.

                    Shortunknown | proposal | plan | order | original-order | reflex-order | filler-order | instance-order | option
                    Comments

                    This element is immutable. Proposed tasks, planned tasks, etc. must be distinct instances.

                    In most cases, Tasks will have an intent of "order".

                    Control1..1
                    BindingThe codes SHALL be taken from TaskIntent
                    (required to http://hl7.org/fhir/ValueSet/task-intent|6.0.0-ballot2)

                    Distinguishes whether the task is a proposal, plan or full order.

                    Typecode
                    Is Modifierfalse
                    Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
                    Must Supportfalse
                    Summarytrue
                    Pattern Valueplan
                    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                    40. Task.priority
                    Definition

                    Indicates how quickly the Task should be addressed with respect to other requests.

                    Shortroutine | urgent | asap | stat
                    Control0..1
                    BindingThe codes SHALL be taken from RequestPriority
                    (required to http://hl7.org/fhir/ValueSet/request-priority|6.0.0-ballot2)

                    The priority of a task (may affect service level applied to the task).

                    Typecode
                    Is Modifierfalse
                    Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
                    Must Supportfalse
                    Summaryfalse
                    Requirements

                    Used to identify the service level expected while performing a task.

                    Meaning if MissingIf missing, this task should be performed with normal priority
                    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                    42. Task.doNotPerform
                    Definition

                    If true indicates that the Task is asking for the specified action to not occur.

                    ShortTrue if Task is prohibiting action
                    Comments

                    The attributes provided with the Task qualify what is not to be done. For example, if a requestedPeriod is provided, the 'do not' request only applies within the specified time. If a requestedPerformer is specified then the 'do not' request only applies to performers of that type. Qualifiers include: code, subject, occurrence, requestedPerformer and performer.

                    In some cases, the Request.code may pre-coordinate prohibition into the requested action. E.g. 'NPO' (nothing by mouth), 'DNR' (do not recussitate). If this happens, doNotPerform SHALL NOT be set to true. I.e. The resource shall not have double negation. (E.g. 'Do not DNR').

                    doNotPerform should ONLY be used with Tasks that are tightly bounded in time or process phase. E.g. 'Do not fulfill the midnight dose of medication X tonight due to the early morning scheduled procedure, where the nurse could reasonably check off 'Med X not given at midnight as instructed'. Similarly, a decision support proposal that a patient should not be given a standard intake questionnaire (because the patient is cognitively impaired) would be marked as 'complete' or 'rejected' when the clinician preps the CarePlan or order set after reviewing the decision support results. If there is a need to create a standing order to not do something that can't be satisfied by a single 'non-action', but rather an ongoing refusal to perform the function, MedicationRequest, ServiceRequest or some other form of authorization should be used.

                    Control0..1
                    Typeboolean
                    Is Modifiertrue because If true, this element negates the Task. For example, instead of a request to perform a task, it is a request _not_ to perform a task.
                    Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
                    Must Supportfalse
                    Summarytrue
                    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                    44. Task.code
                    Definition

                    A name or code (or both) briefly describing what the task involves.

                    ShortTask Type
                    Control1..1
                    This element is affected by the following invariants: tsk-1
                    BindingFor example codes, see TaskCode
                    (example to http://hl7.org/fhir/ValueSet/task-code)

                    Codes to identify what the task involves. These will typically be specific to a particular workflow.

                    TypeCodeableConcept
                    Is Modifierfalse
                    Must Supportfalse
                    Summarytrue
                    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                    46. Task.code.id
                    Definition

                    Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

                    ShortUnique id for inter-element referencing
                    Control0..1
                    This element is affected by the following invariants: ele-1
                    Typeid
                    Is Modifierfalse
                    XML FormatIn the XML format, this property is represented as an attribute.
                    Summaryfalse
                    48. Task.code.extension
                    Definition

                    May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

                    ShortAdditional content defined by implementations
                    Comments

                    There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

                    Control0..*
                    TypeExtension
                    Is Modifierfalse
                    Summaryfalse
                    Alternate Namesextensions, user content
                    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                    SlicingThis element introduces a set of slices on Task.code.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
                    • value @ url
                    • 50. Task.code.coding
                      Definition

                      A reference to a code defined by a terminology system.

                      ShortScheduled Protocol Code Sequence (0040,0008)
                      Comments

                      Codes may be defined very casually in enumerations, or code lists, up to very formal definitions such as SNOMED CT - see the HL7 v3 Core Principles for more information. Ordering of codings is undefined and SHALL NOT be used to infer meaning. Generally, at most only one of the coding values will be labeled as UserSelected = true.

                      Control0..*
                      TypeCoding
                      Is Modifierfalse
                      Summaryfalse
                      Requirements

                      Allows for alternative encodings within a code system, and translations to other code systems.

                      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                      52. Task.code.text
                      Definition

                      A human language representation of the concept as seen/selected/uttered by the user who entered the data and/or which represents the intended meaning of the user.

                      ShortScheduled Procedure Step Description (0040,0007)
                      Comments

                      Very often the text is the same as a displayName of one of the codings.

                      Control0..1
                      Typestring
                      Is Modifierfalse
                      Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
                      Summaryfalse
                      Requirements

                      The codes from the terminologies do not always capture the correct meaning with all the nuances of the human using them, or sometimes there is no appropriate code at all. In these cases, the text is used to capture the full meaning of the source.

                      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                      54. Task.description
                      Definition

                      A free-text description of what is to be performed.

                      ShortHuman-readable explanation of task
                      Control0..1
                      Typemarkdown
                      Is Modifierfalse
                      Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
                      Must Supportfalse
                      Summarytrue
                      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                      56. Task.focus
                      Definition

                      The request being fulfilled or the resource being manipulated (changed, suspended, etc.) by this task.

                      ShortWhat task is acting on
                      Comments

                      If multiple resources need to be manipulated, use sub-tasks. (This ensures that status can be tracked independently for each referenced resource.).

                      Control0..1
                      This element is affected by the following invariants: tsk-1
                      TypeReference(Resource)
                      Is Modifierfalse
                      Must Supportfalse
                      Summarytrue
                      Requirements

                      Used to identify the thing to be done.

                      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                      58. Task.for
                      Definition

                      The entity who benefits from the performance of the service specified in the task (e.g., the patient).

                      ShortBeneficiary of the Task
                      Control0..1
                      TypeReference(Patient - DICOM MWL Patient Mapping)
                      Is Modifierfalse
                      Must Supportfalse
                      Summarytrue
                      Requirements

                      Used to track tasks outstanding for a beneficiary. Do not use to track the task owner or creator (see owner and creator respectively). This can also affect access control.

                      Alternate NamesPatient
                      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                      60. Task.encounter
                      Definition

                      The healthcare event (e.g. a patient and healthcare provider interaction) during which this task was created.

                      ShortHealthcare event during which this task originated
                      Control0..1
                      TypeReference(Encounter - DICOM MWL Visit Mapping)
                      Is Modifierfalse
                      Must Supportfalse
                      Summarytrue
                      Requirements

                      For some tasks it may be important to know the link between the encounter the task originated within.

                      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                      62. Task.requestedPeriod
                      Definition

                      Indicates the start and/or end of the period of time when completion of the task is desired to take place.

                      ShortScheduled Procedure Step Start Date / Scheduled Procedure Step Start Time
                      Comments

                      This is typically used when the Task is not seeking fulfillment of a focus Request, as in that case the period would be specified on the Request and/or in the Task.restriction.period. Instead, it is used for stand-alone tasks.

                      Control1..1
                      TypePeriod
                      Is Modifierfalse
                      Must Supportfalse
                      Summarytrue
                      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                      64. Task.executionPeriod
                      Definition

                      Identifies the time action was first taken against the task (start) and/or the time final action was taken against the task prior to marking it as completed (end).

                      ShortStart and end time of execution
                      Control0..1
                      TypePeriod
                      Is Modifierfalse
                      Must Supportfalse
                      Summarytrue
                      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                      66. Task.authoredOn
                      Definition

                      The date and time this task was created.

                      ShortTask Creation Date
                      Control0..1
                      This element is affected by the following invariants: inv-1
                      TypedateTime
                      Is Modifierfalse
                      Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
                      Must Supportfalse
                      Summaryfalse
                      Requirements

                      Most often used along with lastUpdated to track duration of task to supporting monitoring and management.

                      Alternate NamesCreated Date
                      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                      68. Task.lastModified
                      Definition

                      The date and time of last modification to this task.

                      ShortTask Last Modified Date
                      Control0..1
                      This element is affected by the following invariants: inv-1
                      TypedateTime
                      Is Modifierfalse
                      Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
                      Must Supportfalse
                      Summarytrue
                      Requirements

                      Used along with history to track task activity and time in a particular task state. This enables monitoring and management.

                      Alternate NamesUpdate Date
                      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                      70. Task.requester
                      Definition

                      The creator of the task.

                      ShortWho is asking for task to be done
                      Control0..1
                      TypeReference(Device, Organization, Patient, Practitioner, PractitionerRole, RelatedPerson)
                      Is Modifierfalse
                      Must Supportfalse
                      Summarytrue
                      Requirements

                      Identifies who created this task. May be used by access control mechanisms (e.g., to ensure that only the creator can cancel a task).

                      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                      72. Task.requestedPerformer
                      Definition

                      The kind of participant or specific participant that should perform the task.

                      ShortWho should perform Task
                      Control1..*
                      BindingThe codes SHOULD be taken from ProcedurePerformerRoleCodes
                      (preferred to http://hl7.org/fhir/ValueSet/performer-role)

                      The type(s) of task performers allowed.

                      TypeCodeableReference(Practitioner, PractitionerRole, Organization, CareTeam, HealthcareService, Patient, Device, RelatedPerson)
                      Is Modifierfalse
                      Must Supportfalse
                      Summaryfalse
                      Requirements

                      Use to distinguish tasks on different activity queues.

                      Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                      SlicingThis element introduces a set of slices on Task.requestedPerformer. The slices areUnordered and Open, and can be differentiated using the following discriminators:
                      • value @ reference
                      • 74. Task.requestedPerformer:scheduledStation
                        Slice NamescheduledStation
                        Definition

                        The kind of participant or specific participant that should perform the task.

                        ShortWho should perform Task
                        Control1..1
                        BindingThe codes SHOULD be taken from ProcedurePerformerRoleCodes
                        (preferred to http://hl7.org/fhir/ValueSet/performer-role)

                        The type(s) of task performers allowed.

                        TypeCodeableReference(Device - DICOM Scheduled Station Mapping)
                        Is Modifierfalse
                        Must Supportfalse
                        Summaryfalse
                        Requirements

                        Use to distinguish tasks on different activity queues.

                        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                        76. Task.owner
                        Definition

                        Party responsible for managing task execution.

                        ShortResponsible individual
                        Comments

                        Tasks may be created with an owner not yet identified.

                        Control0..1
                        TypeReference(Practitioner, PractitionerRole, Organization, CareTeam, Patient, RelatedPerson)
                        Is Modifierfalse
                        Must Supportfalse
                        Summarytrue
                        Requirements

                        Identifies who is expected to perform this task.

                        Alternate NamesPerformer, Executer
                        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                        78. Task.performer
                        Definition

                        The entity who performed the requested task.

                        ShortWho or what performed the task
                        Control0..*
                        TypeBackboneElement
                        Is Modifierfalse
                        Must Supportfalse
                        Summarytrue
                        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                        80. Task.performer.id
                        Definition

                        Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

                        ShortUnique id for inter-element referencing
                        Control0..1
                        This element is affected by the following invariants: ele-1
                        Typestring
                        Is Modifierfalse
                        XML FormatIn the XML format, this property is represented as an attribute.
                        Summaryfalse
                        82. Task.performer.extension
                        Definition

                        May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

                        ShortAdditional content defined by implementations
                        Comments

                        There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

                        Control0..*
                        TypeExtension
                        Is Modifierfalse
                        Summaryfalse
                        Alternate Namesextensions, user content
                        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                        84. Task.performer.modifierExtension
                        Definition

                        May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

                        Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

                        ShortExtensions that cannot be ignored even if unrecognized
                        Comments

                        There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

                        Control0..*
                        TypeExtension
                        Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
                        Summarytrue
                        Requirements

                        Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

                        Alternate Namesextensions, user content, modifiers
                        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                        86. Task.performer.function
                        Definition

                        A code or description of the performer of the task.

                        ShortType of performance
                        Control0..1
                        Binding

                        Codes to identify types of task performers.

                        TypeCodeableConcept
                        Is Modifierfalse
                        Must Supportfalse
                        Summarytrue
                        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                        88. Task.performer.actor
                        Definition

                        The actor or entity who performed the task.

                        ShortWho performed the task
                        Control1..1
                        TypeReference(Practitioner, PractitionerRole, Organization, CareTeam, Patient, RelatedPerson)
                        Is Modifierfalse
                        Must Supportfalse
                        Summarytrue
                        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                        90. Task.location
                        Definition

                        Principal physical location where this task is performed.

                        ShortWhere task occurs
                        Comments

                        This should only be specified when the Task to be/being performed happens or is expected to happen primarily within the bounds of a single Location. Other locations (e.g. source, destination, etc.) would either be reflected on the 'basedOn' Request or be conveyed as distinct Task.input values.

                        Control0..1
                        TypeReference(Location)
                        Is Modifierfalse
                        Must Supportfalse
                        Summarytrue
                        Requirements

                        Ties the event to where the records are likely kept and provides context around the event occurrence (e.g. if it occurred inside or outside a dedicated healthcare setting).

                        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                        92. Task.reason
                        Definition

                        A description, code, or reference indicating why this task needs to be performed.

                        ShortWhy task is needed
                        Comments

                        This will typically not be present for Tasks with a code of 'please fulfill' as, for those, the reason for action is conveyed on the Request pointed to by Task.focus. Some types of tasks will not need a 'reason'. E.g. a request to discharge a patient can be inferred to be 'because the patient is ready' and this would not need a reason to be stated on the Task.

                        Control0..*
                        Binding

                        Indicates why the task is needed. E.g. Suspended because patient admitted to hospital.

                        TypeCodeableReference(Resource)
                        Is Modifierfalse
                        Must Supportfalse
                        Summaryfalse
                        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                        94. Task.insurance
                        Definition

                        Insurance plans, coverage extensions, pre-authorizations and/or pre-determinations that may be relevant to the Task.

                        ShortAssociated insurance coverage
                        Control0..*
                        TypeReference(Coverage, ClaimResponse)
                        Is Modifierfalse
                        Must Supportfalse
                        Summaryfalse
                        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                        96. Task.note
                        Definition

                        Free-text information captured about the task as it progresses.

                        ShortComments made about the task
                        Control0..*
                        TypeAnnotation
                        Is Modifierfalse
                        Must Supportfalse
                        Summaryfalse
                        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                        98. Task.relevantHistory
                        Definition

                        Links to Provenance records for past versions of this Task that identify key state transitions or updates that are likely to be relevant to a user looking at the current version of the task.

                        ShortKey events in history of the Task
                        Comments

                        This element does not point to the Provenance associated with the current version of the resource - as it would be created after this version existed. The Provenance for the current version can be retrieved with a _revinclude.

                        Control0..*
                        TypeReference(Provenance)
                        Is Modifierfalse
                        Must Supportfalse
                        Summaryfalse
                        Alternate NamesStatus History
                        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                        100. Task.restriction
                        Definition

                        If the Task.focus is a request resource and the task is seeking fulfillment (i.e. is asking for the request to be actioned), this element identifies any limitations on what parts of the referenced request should be actioned.

                        ShortConstraints on fulfillment tasks
                        Comments

                        Task.restriction can only be present if the Task is seeking fulfillment of another Request resource, and the restriction identifies what subset of the authorization conveyed by the request is supposed to be fulfilled by this Task. A possible example could be a standing order (the request) covering a significant time period and/or individuals, while the Task seeks fulfillment for only a subset of that time-period and a single individual.

                        Control0..1
                        This element is affected by the following invariants: tsk-1
                        TypeBackboneElement
                        Is Modifierfalse
                        Must Supportfalse
                        Summaryfalse
                        Requirements

                        Sometimes when fulfillment is sought, you don't want full fulfillment.

                        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                        102. Task.restriction.id
                        Definition

                        Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

                        ShortUnique id for inter-element referencing
                        Control0..1
                        This element is affected by the following invariants: ele-1
                        Typestring
                        Is Modifierfalse
                        XML FormatIn the XML format, this property is represented as an attribute.
                        Summaryfalse
                        104. Task.restriction.extension
                        Definition

                        May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

                        ShortAdditional content defined by implementations
                        Comments

                        There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

                        Control0..*
                        TypeExtension
                        Is Modifierfalse
                        Summaryfalse
                        Alternate Namesextensions, user content
                        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                        106. Task.restriction.modifierExtension
                        Definition

                        May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

                        Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

                        ShortExtensions that cannot be ignored even if unrecognized
                        Comments

                        There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

                        Control0..*
                        TypeExtension
                        Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
                        Summarytrue
                        Requirements

                        Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

                        Alternate Namesextensions, user content, modifiers
                        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                        108. Task.restriction.repetitions
                        Definition

                        Indicates the number of times the requested action should occur.

                        ShortHow many times to repeat
                        Control0..1
                        TypepositiveInt
                        Is Modifierfalse
                        Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
                        Must Supportfalse
                        Summaryfalse
                        Requirements

                        E.g. order that requests monthly lab tests, fulfillment is sought for 1.

                        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                        110. Task.restriction.period
                        Definition

                        The time-period for which fulfillment is sought. This must fall within the overall time period authorized in the referenced request. E.g. ServiceRequest.occurance[x].

                        ShortWhen fulfillment is sought
                        Comments

                        This is distinct from Task.executionPeriod. ExecutionPeriod indicates when the task needs to be initiated, while Task.restriction.period specifies the subset of the overall authorization that this period covers. For example, a MedicationRequest with an overall effective period of 1 year might have a Task whose restriction.period is 2 months (i.e. satisfy 2 months of medication therapy), while the execution period might be 'between now and 5 days from now' - i.e. If you say yes to this, then you're agreeing to supply medication for that 2 month period within the next 5 days.

                        Note that period.high is the due date representing the time by which the task should be completed.

                        Control0..1
                        TypePeriod
                        Is Modifierfalse
                        Must Supportfalse
                        Summaryfalse
                        Requirements

                        E.g. order that authorizes 1 year's services. Fulfillment is sought for next 3 months.

                        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                        112. Task.restriction.recipient
                        Definition

                        For requests that are targeted to more than one potential recipient/target, to identify who is fulfillment is sought for.

                        ShortFor whom is fulfillment sought?
                        Control0..*
                        TypeReference(Patient, Practitioner, PractitionerRole, RelatedPerson, Group, Organization)
                        Is Modifierfalse
                        Must Supportfalse
                        Summaryfalse
                        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                        114. Task.input
                        Definition

                        Additional information that may be needed in the execution of the task.

                        ShortInformation used to perform task
                        Control1..*
                        TypeBackboneElement
                        Is Modifierfalse
                        Must Supportfalse
                        Summaryfalse
                        Requirements

                        Resources and data used to perform the task. This data is used in the business logic of task execution, and is stored separately because it varies between workflows.

                        Alternate NamesSupporting Information
                        Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                        SlicingThis element introduces a set of slices on Task.input. The slices areUnordered and Open, and can be differentiated using the following discriminators:
                        • value @ type
                        • 116. Task.input.id
                          Definition

                          Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

                          ShortUnique id for inter-element referencing
                          Control0..1
                          This element is affected by the following invariants: ele-1
                          Typestring
                          Is Modifierfalse
                          XML FormatIn the XML format, this property is represented as an attribute.
                          Summaryfalse
                          118. Task.input.extension
                          Definition

                          May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

                          ShortAdditional content defined by implementations
                          Comments

                          There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

                          Control0..*
                          TypeExtension
                          Is Modifierfalse
                          Summaryfalse
                          Alternate Namesextensions, user content
                          Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                          120. Task.input.modifierExtension
                          Definition

                          May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

                          Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

                          ShortExtensions that cannot be ignored even if unrecognized
                          Comments

                          There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

                          Control0..*
                          TypeExtension
                          Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
                          Summarytrue
                          Requirements

                          Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

                          Alternate Namesextensions, user content, modifiers
                          Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                          122. Task.input.type
                          Definition

                          A code or description indicating how the input is intended to be used as part of the task execution.

                          ShortLabel for the input
                          Comments

                          If referencing a BPMN workflow or Protocol, the "system" is the URL for the workflow definition and the code is the "name" of the required input.

                          Control1..1
                          Binding

                          Codes to identify types of input parameters. These will typically be specific to a particular workflow. E.g. "Comparison source", "Applicable consent", "Concomitent Medications", etc.

                          TypeCodeableConcept
                          Is Modifierfalse
                          Must Supportfalse
                          Summaryfalse
                          Requirements

                          Inputs are named to enable task automation to bind data and pass it from one task to the next.

                          Alternate NamesName
                          Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                          124. Task.input.value[x]
                          Definition

                          The value of the input parameter as a basic type.

                          ShortContent to use in performing the task
                          Control1..1
                          TypeChoice of: base64Binary, boolean, canonical, code, date, dateTime, decimal, id, instant, integer, integer64, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, Address, Age, Annotation, Attachment, CodeableConcept, CodeableReference, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, RatioRange, Reference, SampledData, Signature, Timing, ContactDetail, DataRequirement, Expression, ParameterDefinition, RelatedArtifact, TriggerDefinition, UsageContext, Availability, ExtendedContactDetail, Dosage, Meta
                          [x] NoteSeeChoice of Data Typesfor further information about how to use [x]
                          Is Modifierfalse
                          Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
                          Must Supportfalse
                          Summaryfalse
                          Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                          126. Task.input:modality
                          Slice Namemodality
                          Definition

                          Additional information that may be needed in the execution of the task.

                          ShortInformation used to perform task
                          Control1..1
                          TypeBackboneElement
                          Is Modifierfalse
                          Must Supportfalse
                          Summaryfalse
                          Requirements

                          Resources and data used to perform the task. This data is used in the business logic of task execution, and is stored separately because it varies between workflows.

                          Alternate NamesSupporting Information
                          Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                          128. Task.input:modality.id
                          Definition

                          Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

                          ShortUnique id for inter-element referencing
                          Control0..1
                          This element is affected by the following invariants: ele-1
                          Typestring
                          Is Modifierfalse
                          XML FormatIn the XML format, this property is represented as an attribute.
                          Summaryfalse
                          130. Task.input:modality.extension
                          Definition

                          May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

                          ShortAdditional content defined by implementations
                          Comments

                          There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

                          Control0..*
                          TypeExtension
                          Is Modifierfalse
                          Summaryfalse
                          Alternate Namesextensions, user content
                          Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                          132. Task.input:modality.modifierExtension
                          Definition

                          May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

                          Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

                          ShortExtensions that cannot be ignored even if unrecognized
                          Comments

                          There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

                          Control0..*
                          TypeExtension
                          Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
                          Summarytrue
                          Requirements

                          Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

                          Alternate Namesextensions, user content, modifiers
                          Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                          134. Task.input:modality.type
                          Definition

                          A code or description indicating how the input is intended to be used as part of the task execution.

                          ShortLabel for the input
                          Comments

                          If referencing a BPMN workflow or Protocol, the "system" is the URL for the workflow definition and the code is the "name" of the required input.

                          Control1..1
                          Binding

                          Codes to identify types of input parameters. These will typically be specific to a particular workflow. E.g. "Comparison source", "Applicable consent", "Concomitent Medications", etc.

                          TypeCodeableConcept
                          Is Modifierfalse
                          Must Supportfalse
                          Summaryfalse
                          Requirements

                          Inputs are named to enable task automation to bind data and pass it from one task to the next.

                          Alternate NamesName
                          Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                          136. Task.input:modality.type.id
                          Definition

                          Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

                          ShortUnique id for inter-element referencing
                          Control0..1
                          This element is affected by the following invariants: ele-1
                          Typeid
                          Is Modifierfalse
                          XML FormatIn the XML format, this property is represented as an attribute.
                          Summaryfalse
                          138. Task.input:modality.type.extension
                          Definition

                          May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

                          ShortAdditional content defined by implementations
                          Comments

                          There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

                          Control0..*
                          TypeExtension
                          Is Modifierfalse
                          Summaryfalse
                          Alternate Namesextensions, user content
                          Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                          SlicingThis element introduces a set of slices on Task.input.type.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
                          • value @ url
                          • 140. Task.input:modality.type.coding
                            Definition

                            A reference to a code defined by a terminology system.

                            ShortCode defined by a terminology system
                            Comments

                            Codes may be defined very casually in enumerations, or code lists, up to very formal definitions such as SNOMED CT - see the HL7 v3 Core Principles for more information. Ordering of codings is undefined and SHALL NOT be used to infer meaning. Generally, at most only one of the coding values will be labeled as UserSelected = true.

                            Control0..*
                            TypeCoding
                            Is Modifierfalse
                            Summaryfalse
                            Requirements

                            Allows for alternative encodings within a code system, and translations to other code systems.

                            Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                            142. Task.input:modality.type.coding.id
                            Definition

                            Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

                            ShortUnique id for inter-element referencing
                            Control0..1
                            This element is affected by the following invariants: ele-1
                            Typeid
                            Is Modifierfalse
                            XML FormatIn the XML format, this property is represented as an attribute.
                            Summaryfalse
                            144. Task.input:modality.type.coding.extension
                            Definition

                            May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

                            ShortAdditional content defined by implementations
                            Comments

                            There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

                            Control0..*
                            TypeExtension
                            Is Modifierfalse
                            Summaryfalse
                            Alternate Namesextensions, user content
                            Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                            SlicingThis element introduces a set of slices on Task.input.type.coding.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators:
                            • value @ url
                            • 146. Task.input:modality.type.coding.system
                              Definition

                              The identification of the code system that defines the meaning of the symbol in the code.

                              ShortIdentity of the terminology system
                              Comments

                              The URI may be an OID (urn:oid:...) or a UUID (urn:uuid:...). OIDs and UUIDs SHALL be references to the HL7 OID registry. Otherwise, the URI should come from HL7's list of FHIR defined special URIs or it should be an absolute reference to some definition that establishes the system clearly and unambiguously.

                              Control0..1
                              Typeuri
                              Is Modifierfalse
                              Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
                              Summaryfalse
                              Requirements

                              Need to be unambiguous about the source of the definition of the symbol.

                              Pattern Valuehttp://dicom.nema.org/resources/ontology/DCM
                              Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                              148. Task.input:modality.type.coding.version
                              Definition

                              The version of the code system which was used when choosing this code. Note that a well-maintained code system does not need the version reported, because the meaning of codes is consistent across versions. However this cannot consistently be assured, and when the meaning is not guaranteed to be consistent, the version SHOULD be exchanged.

                              ShortVersion of the system - if relevant
                              Comments

                              Where the terminology does not clearly define what string should be used to identify code system versions, the recommendation is to use the date (expressed in FHIR date format) on which that version was officially published as the version date.

                              NoteThis is a business version Id, not a resource version Id (see discussion)
                              Control0..1
                              Typestring
                              Is Modifierfalse
                              Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
                              Summaryfalse
                              Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                              150. Task.input:modality.type.coding.code
                              Definition

                              A symbol in syntax defined by the system. The symbol may be a predefined code or an expression in a syntax defined by the coding system (e.g. post-coordination).

                              ShortSymbol in syntax defined by the system
                              Control0..1
                              This element is affected by the following invariants: cod-1
                              Typecode
                              Is Modifierfalse
                              Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
                              Summaryfalse
                              Requirements

                              Need to refer to a particular code in the system.

                              Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                              152. Task.input:modality.type.coding.display
                              Definition

                              A representation of the meaning of the code in the system, following the rules of the system.

                              ShortRepresentation defined by the system
                              Control0..1
                              This element is affected by the following invariants: cod-1
                              Typestring
                              Is Modifierfalse
                              Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
                              Summaryfalse
                              Requirements

                              Need to be able to carry a human-readable meaning of the code for readers that do not know the system.

                              Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                              154. Task.input:modality.type.coding.userSelected
                              Definition

                              Indicates that this coding was chosen by a user directly - e.g. off a pick list of available items (codes or displays).

                              ShortIf this coding was chosen directly by the user
                              Comments

                              Amongst a set of alternatives, a directly chosen code is the most appropriate starting point for new translations. There is some ambiguity about what exactly 'directly chosen' implies, and trading partner agreement may be needed to clarify the use of this element and its consequences more completely.

                              Control0..1
                              Typeboolean
                              Is Modifierfalse
                              Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
                              Summaryfalse
                              Requirements

                              This has been identified as a clinical safety criterium - that this exact system/code pair was chosen explicitly, rather than inferred by the system based on some rules or language processing.

                              Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                              156. Task.input:modality.type.text
                              Definition

                              A human language representation of the concept as seen/selected/uttered by the user who entered the data and/or which represents the intended meaning of the user.

                              ShortPlain text representation of the concept
                              Comments

                              Very often the text is the same as a displayName of one of the codings.

                              Control0..1
                              Typestring
                              Is Modifierfalse
                              Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
                              Summaryfalse
                              Requirements

                              The codes from the terminologies do not always capture the correct meaning with all the nuances of the human using them, or sometimes there is no appropriate code at all. In these cases, the text is used to capture the full meaning of the source.

                              Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                              158. Task.input:modality.value[x]
                              Definition

                              The value of the input parameter as a basic type.

                              ShortContent to use in performing the task
                              Control1..1
                              TypeChoice of: base64Binary, boolean, canonical, code, date, dateTime, decimal, id, instant, integer, integer64, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, Address, Age, Annotation, Attachment, CodeableConcept, CodeableReference, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, RatioRange, Reference, SampledData, Signature, Timing, ContactDetail, DataRequirement, Expression, ParameterDefinition, RelatedArtifact, TriggerDefinition, UsageContext, Availability, ExtendedContactDetail, Dosage, Meta
                              [x] NoteSeeChoice of Data Typesfor further information about how to use [x]
                              Is Modifierfalse
                              Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
                              Must Supportfalse
                              Summaryfalse
                              Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                              SlicingThis element introduces a set of slices on Task.input.value[x]. The slices areUnordered and Open, and can be differentiated using the following discriminators:
                              • type @ $this
                              • 160. Task.input:modality.value[x]:valueCodeableConcept
                                Slice NamevalueCodeableConcept
                                Definition

                                The value of the input parameter as a basic type.

                                ShortContent to use in performing the task
                                Control0..1
                                BindingThe codes SHALL be taken from ftp://medical.nema.org/medical/dicom/resources/valuesets/fhir/json/ValueSet-dicom-cid-33-Modality
                                (required to ftp://medical.nema.org/medical/dicom/resources/valuesets/fhir/json/ValueSet-dicom-cid-33-Modality)
                                TypeCodeableConcept
                                [x] NoteSeeChoice of Data Typesfor further information about how to use [x]
                                Is Modifierfalse
                                Must Supportfalse
                                Summaryfalse
                                Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                                162. Task.output
                                Definition

                                Outputs produced by the Task.

                                ShortInformation produced as part of task
                                Control0..*
                                TypeBackboneElement
                                Is Modifierfalse
                                Must Supportfalse
                                Summaryfalse
                                Requirements

                                Resources and data produced during the execution the task. This data is generated by the business logic of task execution, and is stored separately because it varies between workflows.

                                Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                                164. Task.output.id
                                Definition

                                Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

                                ShortUnique id for inter-element referencing
                                Control0..1
                                This element is affected by the following invariants: ele-1
                                Typestring
                                Is Modifierfalse
                                XML FormatIn the XML format, this property is represented as an attribute.
                                Summaryfalse
                                166. Task.output.extension
                                Definition

                                May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

                                ShortAdditional content defined by implementations
                                Comments

                                There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

                                Control0..*
                                TypeExtension
                                Is Modifierfalse
                                Summaryfalse
                                Alternate Namesextensions, user content
                                Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                                168. Task.output.modifierExtension
                                Definition

                                May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and managable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

                                Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).

                                ShortExtensions that cannot be ignored even if unrecognized
                                Comments

                                There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

                                Control0..*
                                TypeExtension
                                Is Modifiertrue because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
                                Summarytrue
                                Requirements

                                Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.

                                Alternate Namesextensions, user content, modifiers
                                Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                                170. Task.output.type
                                Definition

                                The name of the Output parameter.

                                ShortLabel for output
                                Control1..1
                                Binding

                                Codes to identify types of input parameters. These will typically be specific to a particular workflow. E.g. "Identified issues", "Preliminary results", "Filler order", "Final results", etc.

                                TypeCodeableConcept
                                Is Modifierfalse
                                Must Supportfalse
                                Summaryfalse
                                Requirements

                                Outputs are named to enable task automation to bind data and pass it from one task to the next.

                                Alternate NamesName
                                Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
                                172. Task.output.value[x]
                                Definition

                                The value of the Output parameter as a basic type.

                                ShortResult of output
                                Control1..1
                                TypeChoice of: base64Binary, boolean, canonical, code, date, dateTime, decimal, id, instant, integer, integer64, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, Address, Age, Annotation, Attachment, CodeableConcept, CodeableReference, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, RatioRange, Reference, SampledData, Signature, Timing, ContactDetail, DataRequirement, Expression, ParameterDefinition, RelatedArtifact, TriggerDefinition, UsageContext, Availability, ExtendedContactDetail, Dosage, Meta
                                [x] NoteSeeChoice of Data Typesfor further information about how to use [x]
                                Is Modifierfalse
                                Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
                                Must Supportfalse
                                Summaryfalse
                                Requirements

                                Task outputs can take any form.

                                Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))