Digital Referral Prescription Implementation Guide
1.0.0 - STU

Digital Referral Prescription Implementation Guide, published by . This guide is not an authorized publication; it is the continuous build for version 1.0.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/hl7-be/referral/ and changes regularly. See the Directory of published versions

## Resource Profile: BePerformerTask - Detailed Descriptions

Draft as of 2025-10-17

Definitions for the be-performer-task resource profile.

- Key Elements Table
- Differential Elements Table
- Snapshot Elements Table

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

0. Task
Definition | A task to be performed.
Short | A task to be performed
Control | 0..*
Is Modifier | false
Summary | false
Invariants | dom-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().as(canonical) | %resource.descendants().as(uri) | %resource.descendants().as(url))) or descendants().where(reference = '#').exists() or descendants().where(as(canonical) = '#').exists() or descendants().where(as(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`) 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)
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.
Short | A 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 it's narrative along with other profiles, value sets, etc.
Control | 0..1
Type | uri
Is Modifier | true because This element is labeled as a modifier because the implicit rules may provide additional knowledge about the resource that modifies it's meaning or interpretation
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Summary | true
Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
4. 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 manageable, 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).
Short | Extensions 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.
Control | 0..*
Type | Extension
Is Modifier | true because Modifier extensions are expected to modify the meaning or interpretation of the resource that contains them
Summary | false
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 Names | extensions, user content
Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
6. Task.identifier
Definition | The business identifier for this task.
Short | Task Instance Identifier
Note | This is a business identifier, not a resource identifier (see discussion)
Control | 0..*
Type | Identifier
Is Modifier | false
Summary | false
Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
Slicing | This element introduces a set of slices on `Task.identifier`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ system
8. Task.identifier:UHMEP
Slice Name | UHMEP
Definition | The business identifier for this task.
Short | Reference ID of the UHMEP once available thereTask Instance Identifier
Note | This is a business identifier, not a resource identifier (see discussion)
Control | 0..1*
Type | Identifier
Is Modifier | false
Must Support | true
Summary | false
Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
10. Task.identifier:UHMEP.use
Definition | The purpose of this identifier.
Short | usual | official | temp | secondary | old (If known)
Comments | Applications can assume that an identifier is permanent unless it explicitly says that it is temporary.
Control | 0..1
Binding | The codes SHALL be taken from IdentifierUse http://hl7.org/fhir/ValueSet/identifier-use|4.0.1 (required to `http://hl7.org/fhir/ValueSet/identifier-use|4.0.1` ) Identifies the purpose for this identifier, if known .
Type | code
Is Modifier | true because This is labeled as "Is Modifier" because applications should not mistake a temporary id for a permanent one.
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Summary | true
Requirements | Allows the appropriate identifier for a particular context of use to be selected from among a set of identifiers.
Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
12. Task.identifier:UHMEP.system
Definition | Establishes the namespace for the value - that is, a URL that describes a set values that are unique.
Short | The namespace for the identifier value
Comments | Identifier.system is always case sensitive.
Control | 10..1
Type | uri
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Summary | true
Requirements | There are many sets of identifiers. To perform matching of two identifiers, we need to know what set we're dealing with. The system identifies a particular set of unique identifiers.
Fixed Value | `https://www.ehealth.fgov.be/standards/fhir/referral/NamingSystem/uhmep`
Example | General: http://www.acme.com/identifiers/patient
Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
14. Task.identifier:UHMEP.value
Definition | The portion of the identifier typically relevant to the user and which is unique within the context of the system.
Short | The value that is unique
Comments | If the value is a full URI, then the system SHALL be urn:ietf:rfc:3986. The value's primary purpose is computational mapping. As a result, it may be normalized for comparison purposes (e.g. removing non-significant whitespace, dashes, etc.) A value formatted for human display can be conveyed using the Rendered Value extension. Identifier.value is to be treated as case sensitive unless knowledge of the Identifier.system allows the processer to be confident that non-case-sensitive processing is safe.
Control | 10..1
Type | string
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Summary | true
Example | General: 123456
Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
16. 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, ServiceRequest, CarePlan, etc. which is distinct from the "request" resource the task is seeking to fulfill. This latter resource is referenced by FocusOn. For example, based on a ServiceRequest (= BasedOn), a task is created to fulfill a procedureRequest ( = FocusOn ) to collect a specimen from a patient.
Short | Request fulfilled by this task
Control | 0..*
Type | Reference(BeAssignmentTask, Resource)
Is Modifier | false
Must Support | true
Summary | true
Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
18. Task.partOf
Definition | Task that this particular task is part of.
Short | Reference to the BeReferral task linked to the prescriptionComposite task
Comments | This should usually be 0..1.
Control | 10..1*
Type | Reference(BeReferralTask, Task)
Is Modifier | false
Must Support | true
Summary | true
Requirements | Allows tasks to be broken down into sub-steps (and this division can occur independent of the original task).
Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
20. Task.status
Definition | The current status of the task.
Short | draft | requested | received | accepted | +
Control | 1..1
Binding | The codes SHALL be taken from TaskStatus http://hl7.org/fhir/ValueSet/task-status|4.0.1 (required to `http://hl7.org/fhir/ValueSet/task-status|4.0.1` ) The current status of the task.
Type | code
Is Modifier | true 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 Value | This primitive element may be present, or absent, or replaced by an extension
Must Support | true
Summary | true
Requirements | These states enable coordination of task status with off-the-shelf workflow solutions that support automation of tasks.
Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
22. Task.statusReason
Definition | An explanation as to why this task is held, failed, was refused, etc.
Short | Reason for current status
Comments | This applies to the current status. Look at the history of the task to see reasons for past statuses.
Control | 0..1
Binding | For example codes, see BeVSPerformerTaskStatusReason (example to `https://www.ehealth.fgov.be/standards/fhir/drp/ValueSet/be-vs-performer-task-status-reason` )
Type | CodeableConcept
Is Modifier | false
Must Support | true
Summary | true
Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
24. 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.
Short | unknown | 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".
Control | 1..1
Binding | The codes SHALL be taken from TaskIntent http://hl7.org/fhir/ValueSet/task-intent|4.0.1 (required to `http://hl7.org/fhir/ValueSet/task-intent|4.0.1` ) The actual valueset will be provided when a terminology package is available. For current guidance, see the included ValueSet. Distinguishes whether the task is a proposal, plan or full order.
Type | code
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Summary | true
Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
26. Task.focus
Definition | The request being actioned or the resource being manipulated by this task.
Short | What 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.).
Control | 0..1
Type | Reference(BeReferralServiceRequest, BeAnnex81, Resource)
Is Modifier | false
Must Support | true
Must Support Types | No must-support rules about the choice of types/profiles
Summary | true
Requirements | Used to identify the thing to be done.
Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
28. 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).
Short | Start and end date when the performer executed the taskStart and end time of execution
Control | 0..1
Type | Period
Is Modifier | false
Must Support | true
Summary | true
Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
30. Task.authoredOn
Definition | The date and time this task was created.
Short | Task Creation Date
Control | 10..1 This element is affected by the following invariants: inv-1
Type | dateTime
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Must Support | true
Summary | false
Requirements | Most often used along with lastUpdated to track duration of task to supporting monitoring and management.
Alternate Names | Created Date
Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) be-inv-long-date: date SHALL contain a long date (YYYY-MM-DDThh:mm:ss+zz:zz) (`empty() or toString().length()=25`)
32. Task.owner
Definition | Individual organization or Device currently responsible for task execution.
Short | Reference to the performer of the referral prescriptionResponsible individual
Comments | Tasks may be created with an owner not yet identified.
Control | 10..1
Type | Reference(BePractitionerRole, Practitioner, PractitionerRole, Organization, CareTeam, HealthcareService, Patient, Device, RelatedPerson)
Is Modifier | false
Must Support | true
Summary | true
Requirements | Identifies who is expected to perform this task.
Alternate Names | Performer, Executer
Invariants | ele-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 foundhere

0. Task
2. Task.identifier
Note | This is a business identifier, not a resource identifier (see discussion)
Slicing | This element introduces a set of slices on `Task.identifier`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ system
4. Task.identifier:UHMEP
Slice Name | UHMEP
Short | Reference ID of the UHMEP once available there
Note | This is a business identifier, not a resource identifier (see discussion)
Control | 0..1
Must Support | true
6. Task.identifier:UHMEP.system
Control | 1..?
Fixed Value | `https://www.ehealth.fgov.be/standards/fhir/referral/NamingSystem/uhmep`
8. Task.identifier:UHMEP.value
Control | 1..?
10. Task.basedOn
Type | Reference(BeAssignmentTask)
Must Support | true
12. Task.partOf
Short | Reference to the BeReferral task linked to the prescription
Control | 1..1
Type | Reference(BeReferralTask)
Must Support | true
14. Task.status
Must Support | true
16. Task.statusReason
Binding | For example codes, see BeVSPerformerTaskStatusReason (example to `https://www.ehealth.fgov.be/standards/fhir/drp/ValueSet/be-vs-performer-task-status-reason` )
Must Support | true
18. Task.intent
Binding | The codes SHALL be taken from TaskIntent (required to `http://hl7.org/fhir/ValueSet/task-intent|4.0.1` ) The actual valueset will be provided when a terminology package is available. For current guidance, see the included ValueSet.
20. Task.focus
Type | Reference(BeReferralServiceRequest, BeAnnex81)
Must Support | true
Must Support Types | No must-support rules about the choice of types/profiles
22. Task.executionPeriod
Short | Start and end date when the performer executed the task
Must Support | true
24. Task.authoredOn
Control | 1..?
Must Support | true
Invariants | be-inv-long-date: date SHALL contain a long date (YYYY-MM-DDThh:mm:ss+zz:zz) (`empty() or toString().length()=25`)
26. Task.owner
Short | Reference to the performer of the referral prescription
Control | 1..?
Type | Reference(BePractitionerRole)
Must Support | true

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

0. Task
Definition | A task to be performed.
Short | A task to be performed
Control | 0..*
Is Modifier | false
Summary | false
Invariants | dom-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().as(canonical) | %resource.descendants().as(uri) | %resource.descendants().as(url))) or descendants().where(reference = '#').exists() or descendants().where(as(canonical) = '#').exists() or descendants().where(as(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`)
2. Task.id
Definition | The logical id of the resource, as used in the URL for the resource. Once assigned, this value never changes.
Short | Logical id of this artifact
Comments | The only time that a resource does not have an id is when it is being submitted to the server using a create operation.
Control | 0..1
Type | id
Is Modifier | false
Summary | true
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.
Short | Metadata about the resource
Control | 0..1
Type | Meta
Is Modifier | false
Summary | true
Invariants | ele-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.
Short | A 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 it's narrative along with other profiles, value sets, etc.
Control | 0..1
Type | uri
Is Modifier | true because This element is labeled as a modifier because the implicit rules may provide additional knowledge about the resource that modifies it's meaning or interpretation
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Summary | true
Invariants | ele-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.
Short | Language 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).
Control | 0..1
Binding | The codes SHOULD be taken from CommonLanguages (preferred to `http://hl7.org/fhir/ValueSet/languages|4.0.1` ) A human language.
Additional Bindings | Purpose
AllLanguages | Max Binding
Type | code
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Summary | false
Invariants | ele-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.
Short | Text summary of the resource, for human interpretation
Comments | Contained resources do not have 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.
Control | 0..1
Type | Narrative
Is Modifier | false
Summary | false
Alternate Names | narrative, html, xhtml, display
Invariants | ele-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, and nor can they have their own independent transaction scope.
Short | Contained, 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.
Control | 0..*
Type | Resource
Is Modifier | false
Summary | false
Alternate Names | inline 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 manageable, 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.
Short | Additional 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.
Control | 0..*
Type | Extension
Is Modifier | false
Summary | false
Alternate Names | extensions, user content
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
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 manageable, 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).
Short | Extensions 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.
Control | 0..*
Type | Extension
Is Modifier | true because Modifier extensions are expected to modify the meaning or interpretation of the resource that contains them
Summary | false
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 Names | extensions, user content
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
18. Task.identifier
Definition | The business identifier for this task.
Short | Task Instance Identifier
Note | This is a business identifier, not a resource identifier (see discussion)
Control | 0..*
Type | Identifier
Is Modifier | false
Summary | false
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
Slicing | This element introduces a set of slices on `Task.identifier`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ system
20. Task.identifier:UHMEP
Slice Name | UHMEP
Definition | The business identifier for this task.
Short | Reference ID of the UHMEP once available there
Note | This is a business identifier, not a resource identifier (see discussion)
Control | 0..1
Type | Identifier
Is Modifier | false
Must Support | true
Summary | false
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
22. Task.identifier:UHMEP.id
Definition | Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short | Unique id for inter-element referencing
Control | 0..1
Type | string
Is Modifier | false
XML Format | In the XML format, this property is represented as an attribute.
Summary | false
24. Task.identifier:UHMEP.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 manageable, 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.
Short | Additional 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.
Control | 0..*
Type | Extension
Is Modifier | false
Summary | false
Alternate Names | extensions, user content
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing | This element introduces a set of slices on `Task.identifier.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
26. Task.identifier:UHMEP.use
Definition | The purpose of this identifier.
Short | usual | official | temp | secondary | old (If known)
Comments | Applications can assume that an identifier is permanent unless it explicitly says that it is temporary.
Control | 0..1
Binding | The codes SHALL be taken from IdentifierUse (required to `http://hl7.org/fhir/ValueSet/identifier-use|4.0.1` ) Identifies the purpose for this identifier, if known .
Type | code
Is Modifier | true because This is labeled as "Is Modifier" because applications should not mistake a temporary id for a permanent one.
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Summary | true
Requirements | Allows the appropriate identifier for a particular context of use to be selected from among a set of identifiers.
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
28. Task.identifier:UHMEP.type
Definition | A coded type for the identifier that can be used to determine which identifier to use for a specific purpose.
Short | Description of identifier
Comments | This element deals only with general categories of identifiers. It SHOULD not be used for codes that correspond 1..1 with the Identifier.system. Some identifiers may fall into multiple categories due to common usage. Where the system is known, a type is unnecessary because the type is always part of the system definition. However systems often need to handle identifiers where the system is not known. There is not a 1:1 relationship between type and system, since many different systems have the same type.
Control | 0..1
Binding | Unless not suitable, these codes SHALL be taken from Identifier Type Codes (extensible to `http://hl7.org/fhir/ValueSet/identifier-type|4.0.1` ) A coded type for an identifier that can be used to determine which identifier to use for a specific purpose.
Type | CodeableConcept
Is Modifier | false
Summary | true
Requirements | Allows users to make use of identifiers when the identifier system is not known.
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
30. Task.identifier:UHMEP.system
Definition | Establishes the namespace for the value - that is, a URL that describes a set values that are unique.
Short | The namespace for the identifier value
Comments | Identifier.system is always case sensitive.
Control | 1..1
Type | uri
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Summary | true
Requirements | There are many sets of identifiers. To perform matching of two identifiers, we need to know what set we're dealing with. The system identifies a particular set of unique identifiers.
Fixed Value | `https://www.ehealth.fgov.be/standards/fhir/referral/NamingSystem/uhmep`
Example | General: http://www.acme.com/identifiers/patient
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
32. Task.identifier:UHMEP.value
Definition | The portion of the identifier typically relevant to the user and which is unique within the context of the system.
Short | The value that is unique
Comments | If the value is a full URI, then the system SHALL be urn:ietf:rfc:3986. The value's primary purpose is computational mapping. As a result, it may be normalized for comparison purposes (e.g. removing non-significant whitespace, dashes, etc.) A value formatted for human display can be conveyed using the Rendered Value extension. Identifier.value is to be treated as case sensitive unless knowledge of the Identifier.system allows the processer to be confident that non-case-sensitive processing is safe.
Control | 1..1
Type | string
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Summary | true
Example | General: 123456
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
34. Task.identifier:UHMEP.period
Definition | Time period during which identifier is/was valid for use.
Short | Time period when id is/was valid for use
Control | 0..1
Type | Period
Is Modifier | false
Summary | true
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
36. Task.identifier:UHMEP.assigner
Definition | Organization that issued/manages the identifier.
Short | Organization that issued id (may be just text)
Comments | The Identifier.assigner may omit the .reference element and only contain a .display element reflecting the name or other textual information about the assigning organization.
Control | 0..1
Type | Reference(Organization)
Is Modifier | false
Summary | true
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
38. 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.
Short | Formal definition of task
Control | 0..1
Type | canonical(ActivityDefinition)
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Summary | true
Requirements | Enables a formal definition of how he task is to be performed, enabling automation.
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
40. 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.
Short | Formal definition of task
Control | 0..1
Type | uri
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Summary | true
Requirements | Enables a formal definition of how he task is to be performed (e.g. using BPMN, BPEL, XPDL or other formal notation to be associated with a task), enabling automation.
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
42. 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, ServiceRequest, CarePlan, etc. which is distinct from the "request" resource the task is seeking to fulfill. This latter resource is referenced by FocusOn. For example, based on a ServiceRequest (= BasedOn), a task is created to fulfill a procedureRequest ( = FocusOn ) to collect a specimen from a patient.
Short | Request fulfilled by this task
Control | 0..*
Type | Reference(BeAssignmentTask)
Is Modifier | false
Must Support | true
Summary | true
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
44. Task.groupIdentifier
Definition | An identifier that links together multiple tasks and other requests that were created in the same context.
Short | Requisition or grouper id
Control | 0..1
Type | Identifier
Is Modifier | false
Summary | true
Requirements | Billing and/or reporting can be linked to whether multiple requests were created as a single unit.
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
46. Task.partOf
Definition | Task that this particular task is part of.
Short | Reference to the BeReferral task linked to the prescription
Comments | This should usually be 0..1.
Control | 1..1
Type | Reference(BeReferralTask)
Is Modifier | false
Must Support | true
Summary | true
Requirements | Allows tasks to be broken down into sub-steps (and this division can occur independent of the original task).
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
48. Task.status
Definition | The current status of the task.
Short | draft | requested | received | accepted | +
Control | 1..1
Binding | The codes SHALL be taken from TaskStatus (required to `http://hl7.org/fhir/ValueSet/task-status|4.0.1` ) The current status of the task.
Type | code
Is Modifier | true 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 Value | This primitive element may be present, or absent, or replaced by an extension
Must Support | true
Summary | true
Requirements | These states enable coordination of task status with off-the-shelf workflow solutions that support automation of tasks.
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
50. Task.statusReason
Definition | An explanation as to why this task is held, failed, was refused, etc.
Short | Reason for current status
Comments | This applies to the current status. Look at the history of the task to see reasons for past statuses.
Control | 0..1
Binding | For example codes, see BeVSPerformerTaskStatusReason (example to `https://www.ehealth.fgov.be/standards/fhir/drp/ValueSet/be-vs-performer-task-status-reason` )
Type | CodeableConcept
Is Modifier | false
Must Support | true
Summary | true
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
52. Task.businessStatus
Definition | Contains business-specific nuances of the business state.
Short | E.g. "Specimen collected", "IV prepped"
Control | 0..1
Binding | The domain-specific business-contextual sub-state of the task. For example: "Blood drawn", "IV inserted", "Awaiting physician signature", etc.
Type | CodeableConcept
Is Modifier | false
Summary | true
Requirements | There's often a need to track substates of a task - this is often variable by specific workflow implementation.
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
54. 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.
Short | unknown | 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".
Control | 1..1
Binding | The codes SHALL be taken from TaskIntent (required to `http://hl7.org/fhir/ValueSet/task-intent|4.0.1` ) The actual valueset will be provided when a terminology package is available. For current guidance, see the included ValueSet.
Type | code
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Summary | true
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
56. Task.priority
Definition | Indicates how quickly the Task should be addressed with respect to other requests.
Short | routine | urgent | asap | stat
Control | 0..1
Binding | The codes SHALL be taken from RequestPriority (required to `http://hl7.org/fhir/ValueSet/request-priority|4.0.1` ) The task's priority.
Type | code
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Summary | false
Requirements | Used to identify the service level expected while performing a task.
Meaning if Missing | If missing, this task should be performed with normal priority
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
58. Task.code
Definition | A name or code (or both) briefly describing what the task involves.
Short | Task Type
Comments | The title (eg "My Tasks", "Outstanding Tasks for Patient X") should go into the code.
Control | 0..1
Binding | For example codes, see TaskCode (example to `http://hl7.org/fhir/ValueSet/task-code|4.0.1` ) Codes to identify what the task involves. These will typically be specific to a particular workflow.
Type | CodeableConcept
Is Modifier | false
Summary | true
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
60. Task.description
Definition | A free-text description of what is to be performed.
Short | Human-readable explanation of task
Control | 0..1
Type | string
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Summary | true
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
62. Task.focus
Definition | The request being actioned or the resource being manipulated by this task.
Short | What 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.).
Control | 0..1
Type | Reference(BeReferralServiceRequest, BeAnnex81)
Is Modifier | false
Must Support | true
Must Support Types | No must-support rules about the choice of types/profiles
Summary | true
Requirements | Used to identify the thing to be done.
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
64. Task.for
Definition | The entity who benefits from the performance of the service specified in the task (e.g., the patient).
Short | Beneficiary of the Task
Control | 0..1
Type | Reference(Resource)
Is Modifier | false
Summary | true
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 Names | Patient
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
66. Task.encounter
Definition | The healthcare event (e.g. a patient and healthcare provider interaction) during which this task was created.
Short | Healthcare event during which this task originated
Control | 0..1
Type | Reference(Encounter)
Is Modifier | false
Summary | true
Requirements | For some tasks it may be important to know the link between the encounter the task originated within.
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
68. 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).
Short | Start and end date when the performer executed the task
Control | 0..1
Type | Period
Is Modifier | false
Must Support | true
Summary | true
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
70. Task.authoredOn
Definition | The date and time this task was created.
Short | Task Creation Date
Control | 1..1 This element is affected by the following invariants: inv-1
Type | dateTime
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Must Support | true
Summary | false
Requirements | Most often used along with lastUpdated to track duration of task to supporting monitoring and management.
Alternate Names | Created Date
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) be-inv-long-date: date SHALL contain a long date (YYYY-MM-DDThh:mm:ss+zz:zz) (`empty() or toString().length()=25`)
72. Task.lastModified
Definition | The date and time of last modification to this task.
Short | Task Last Modified Date
Control | 0..1 This element is affected by the following invariants: inv-1
Type | dateTime
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Summary | true
Requirements | Used along with history to track task activity and time in a particular task state. This enables monitoring and management.
Alternate Names | Update Date
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
74. Task.requester
Definition | The creator of the task.
Short | Who is asking for task to be done
Control | 0..1
Type | Reference(Device, Organization, Patient, Practitioner, PractitionerRole, RelatedPerson)
Is Modifier | false
Summary | true
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).
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
76. Task.performerType
Definition | The kind of participant that should perform the task.
Short | Requested performer
Control | 0..*
Binding | The codes SHOULD be taken from ProcedurePerformerRoleCodes (preferred to `http://hl7.org/fhir/ValueSet/performer-role|4.0.1` ) The type(s) of task performers allowed.
Type | CodeableConcept
Is Modifier | false
Summary | false
Requirements | Use to distinguish tasks on different activity queues.
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
78. Task.owner
Definition | Individual organization or Device currently responsible for task execution.
Short | Reference to the performer of the referral prescription
Comments | Tasks may be created with an owner not yet identified.
Control | 1..1
Type | Reference(BePractitionerRole)
Is Modifier | false
Must Support | true
Summary | true
Requirements | Identifies who is expected to perform this task.
Alternate Names | Performer, Executer
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
80. Task.location
Definition | Principal physical location where the this task is performed.
Short | Where task occurs
Control | 0..1
Type | Reference(Location)
Is Modifier | false
Summary | true
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).
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
82. Task.reasonCode
Definition | A description or code indicating why this task needs to be performed.
Short | Why task is needed
Comments | This should only be included if there is no focus or if it differs from the reason indicated on the focus.
Control | 0..1
Binding | Indicates why the task is needed. E.g. Suspended because patient admitted to hospital.
Type | CodeableConcept
Is Modifier | false
Summary | false
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
84. Task.reasonReference
Definition | A resource reference indicating why this task needs to be performed.
Short | Why task is needed
Comments | Tasks might be justified based on an Observation, a Condition, a past or planned procedure, etc. This should only be included if there is no focus or if it differs from the reason indicated on the focus. Use the CodeableConcept text element in `Task.reasonCode` if the data is free (uncoded) text.
Control | 0..1
Type | Reference(Resource)
Is Modifier | false
Summary | false
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
86. Task.insurance
Definition | Insurance plans, coverage extensions, pre-authorizations and/or pre-determinations that may be relevant to the Task.
Short | Associated insurance coverage
Control | 0..*
Type | Reference(Coverage, ClaimResponse)
Is Modifier | false
Summary | false
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
88. Task.note
Definition | Free-text information captured about the task as it progresses.
Short | Comments made about the task
Control | 0..*
Type | Annotation
Is Modifier | false
Summary | false
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
90. 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.
Short | Key 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.
Control | 0..*
Type | Reference(Provenance)
Is Modifier | false
Summary | false
Alternate Names | Status History
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
92. 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.
Short | Constraints on fulfillment tasks
Control | 0..1
Type | BackboneElement
Is Modifier | false
Summary | false
Requirements | Sometimes when fulfillment is sought, you don't want full fulfillment.
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
94. 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.
Short | Unique id for inter-element referencing
Control | 0..1
Type | string
Is Modifier | false
XML Format | In the XML format, this property is represented as an attribute.
Summary | false
96. 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 manageable, 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.
Short | Additional 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.
Control | 0..*
Type | Extension
Is Modifier | false
Summary | false
Alternate Names | extensions, user content
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
98. 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 manageable, 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).
Short | Extensions 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.
Control | 0..*
Type | Extension
Is Modifier | true because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
Summary | true
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 Names | extensions, user content, modifiers
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
100. Task.restriction.repetitions
Definition | Indicates the number of times the requested action should occur.
Short | How many times to repeat
Control | 0..1
Type | positiveInt
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Summary | false
Requirements | E.g. order that requests monthly lab tests, fulfillment is sought for 1.
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
102. Task.restriction.period
Definition | Over what time-period is fulfillment sought.
Short | When fulfillment sought
Comments | Note that period.high is the due date representing the time by which the task should be completed.
Control | 0..1
Type | Period
Is Modifier | false
Summary | false
Requirements | E.g. order that authorizes 1 year's services. Fulfillment is sought for next 3 months.
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
104. Task.restriction.recipient
Definition | For requests that are targeted to more than on potential recipient/target, for whom is fulfillment sought?
Short | For whom is fulfillment sought?
Control | 0..*
Type | Reference(Patient, Practitioner, PractitionerRole, RelatedPerson, Group, Organization)
Is Modifier | false
Summary | false
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
106. Task.input
Definition | Additional information that may be needed in the execution of the task.
Short | Information used to perform task
Control | 0..*
Type | BackboneElement
Is Modifier | false
Summary | false
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 Names | Supporting Information
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
108. 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.
Short | Unique id for inter-element referencing
Control | 0..1
Type | string
Is Modifier | false
XML Format | In the XML format, this property is represented as an attribute.
Summary | false
110. 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 manageable, 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.
Short | Additional 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.
Control | 0..*
Type | Extension
Is Modifier | false
Summary | false
Alternate Names | extensions, user content
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
112. 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 manageable, 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).
Short | Extensions 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.
Control | 0..*
Type | Extension
Is Modifier | true because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
Summary | true
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 Names | extensions, user content, modifiers
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
114. Task.input.type
Definition | A code or description indicating how the input is intended to be used as part of the task execution.
Short | Label 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.
Control | 1..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.
Type | CodeableConcept
Is Modifier | false
Summary | false
Requirements | Inputs are named to enable task automation to bind data and pass it from one task to the next.
Alternate Names | Name
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
116. Task.input.value[x]
Definition | The value of the input parameter as a basic type.
Short | Content to use in performing the task
Control | 1..1
Type | Choice of: base64Binary, boolean, canonical, code, date, dateTime, decimal, id, instant, integer, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, Address, Age, Annotation, Attachment, CodeableConcept, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, Reference, SampledData, Signature, Timing, ContactDetail, Contributor, DataRequirement, Expression, ParameterDefinition, RelatedArtifact, TriggerDefinition, UsageContext, Dosage, Meta
[x] Note | SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Summary | false
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
118. Task.output
Definition | Outputs produced by the Task.
Short | Information produced as part of task
Control | 0..*
Type | BackboneElement
Is Modifier | false
Summary | false
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.
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
120. 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.
Short | Unique id for inter-element referencing
Control | 0..1
Type | string
Is Modifier | false
XML Format | In the XML format, this property is represented as an attribute.
Summary | false
122. 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 manageable, 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.
Short | Additional 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.
Control | 0..*
Type | Extension
Is Modifier | false
Summary | false
Alternate Names | extensions, user content
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
124. 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 manageable, 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).
Short | Extensions 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.
Control | 0..*
Type | Extension
Is Modifier | true because Modifier extensions are expected to modify the meaning or interpretation of the element that contains them
Summary | true
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 Names | extensions, user content, modifiers
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
126. Task.output.type
Definition | The name of the Output parameter.
Short | Label for output
Control | 1..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.
Type | CodeableConcept
Is Modifier | false
Summary | false
Requirements | Outputs are named to enable task automation to bind data and pass it from one task to the next.
Alternate Names | Name
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
128. Task.output.value[x]
Definition | The value of the Output parameter as a basic type.
Short | Result of output
Control | 1..1
Type | Choice of: base64Binary, boolean, canonical, code, date, dateTime, decimal, id, instant, integer, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, Address, Age, Annotation, Attachment, CodeableConcept, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, Reference, SampledData, Signature, Timing, ContactDetail, Contributor, DataRequirement, Expression, ParameterDefinition, RelatedArtifact, TriggerDefinition, UsageContext, Dosage, Meta
[x] Note | SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Summary | false
Requirements | Task outputs can take any form.
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)