R5: Triggering observation(s) (new) - MII Implementation Guide Microbiology v2027.0.0-ballot2

MII Implementation Guide Microbiology - Local Development build (v2027.0.0-ballot2) built by the FHIR (HL7® FHIR® Standard) Build Tools. See the Directory of published versions

Extension: R5: Triggering observation(s) (new) - Detailed Descriptions

Active as of 2026-09-14

Definitions for the ext-R5-Observation.triggeredBy extension

Key Elements Table
Differential Table
Snapshot Table

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

0. Extension
Definition	R5: `Observation.triggeredBy` (new:BackboneElement) Optional Extension Element - found in all resources.
Short	R5: Triggering observation(s) (new)Optional Extensions Element
Comments	Element `Observation.triggeredBy` has a context of Observation based on following the parent source element upwards and mapping to `Observation`. Element `Observation.triggeredBy` has no mapping targets in FHIR R4. Typically, this is because the element has been added (is a new element).
Control	0..* This element is affected by the following invariants: ele-1
Is Modifier	false
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()`) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
2. Extension.extension
Definition	An Extension 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	ExtensionAdditional 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	20..*
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 `Extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
4. Extension.extension:observation
Slice Name	observation
Definition	R5: `Observation.triggeredBy.observation` (new:Reference(Observation))
Short	R5: Triggering observation (new)Additional content defined by implementations
Comments	Element `Observation.triggeredBy.observation` is part of an existing definition because parent element `Observation.triggeredBy` requires a cross-version extension. Element `Observation.triggeredBy.observation` has a context of Observation based on following the parent source element upwards and mapping to `Observation`. Element `Observation.triggeredBy.observation` has no mapping targets in FHIR R4. Typically, this is because the element has been added (is a new element).
Control	10..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `Observation.triggeredBy.observation` is part of an existing definition because parent element `Observation.triggeredBy` requires a cross-version extension. Element `Observation.triggeredBy.observation` has a context of Observation based on following the parent source element upwards and mapping to `Observation`. Element `Observation.triggeredBy.observation` has no mapping targets in FHIR R4. Typically, this is because the element has been added (is a new element).
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. Extension.extension:observation.extension
Definition	An Extension 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	ExtensionAdditional 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..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 `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
8. Extension.extension:observation.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`observation`
10. Extension.extension:observation.value[x]
Definition	Reference to the triggering observation. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Triggering observationValue of extension
Control	10..1
Type	Reference(Observation), date, Meta, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
12. Extension.extension:type
Slice Name	type
Definition	R5: `Observation.triggeredBy.type` (new:code)
Short	R5: reflex \| repeat \| re-run (new)Additional content defined by implementations
Comments	Element `Observation.triggeredBy.type` is part of an existing definition because parent element `Observation.triggeredBy` requires a cross-version extension. Element `Observation.triggeredBy.type` has a context of Observation based on following the parent source element upwards and mapping to `Observation`. Element `Observation.triggeredBy.type` has no mapping targets in FHIR R4. Typically, this is because the element has been added (is a new element).
Control	10..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `Observation.triggeredBy.type` is part of an existing definition because parent element `Observation.triggeredBy` requires a cross-version extension. Element `Observation.triggeredBy.type` has a context of Observation based on following the parent source element upwards and mapping to `Observation`. Element `Observation.triggeredBy.type` has no mapping targets in FHIR R4. Typically, this is because the element has been added (is a new element).
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())
14. Extension.extension:type.extension
Definition	An Extension 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	ExtensionAdditional 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..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 `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
16. Extension.extension:type.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`type`
18. Extension.extension:type.value[x]
Definition	The type of trigger. Reflex \| Repeat \| Re-run. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	reflex \| repeat \| re-runValue of extension
Control	10..1
Binding	The codes SHALL be taken from For codes, see R5ObservationTriggeredbytypeForR4 (0.1.0) (required to `http://hl7.org/fhir/uv/xver/ValueSet/R5-observation-triggeredbytype-for-R4\|0.1.0`) The type of TriggeredBy Observation.
Type	code, date, Meta, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, Signature, unsignedInt, time
[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()))
20. Extension.extension:reason
Slice Name	reason
Definition	R5: `Observation.triggeredBy.reason` (new:string)
Short	R5: Reason that the observation was triggered (new)Additional content defined by implementations
Comments	Element `Observation.triggeredBy.reason` is part of an existing definition because parent element `Observation.triggeredBy` requires a cross-version extension. Element `Observation.triggeredBy.reason` has a context of Observation based on following the parent source element upwards and mapping to `Observation`. Element `Observation.triggeredBy.reason` has no mapping targets in FHIR R4. Typically, this is because the element has been added (is a new element).
Control	0..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `Observation.triggeredBy.reason` is part of an existing definition because parent element `Observation.triggeredBy` requires a cross-version extension. Element `Observation.triggeredBy.reason` has a context of Observation based on following the parent source element upwards and mapping to `Observation`. Element `Observation.triggeredBy.reason` has no mapping targets in FHIR R4. Typically, this is because the element has been added (is a new element).
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())
22. Extension.extension:reason.extension
Definition	An Extension 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	ExtensionAdditional 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..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 `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
24. Extension.extension:reason.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`reason`
26. Extension.extension:reason.value[x]
Definition	Provides the reason why this observation was performed as a result of the observation(s) referenced. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Reason that the observation was triggeredValue of extension
Control	0..1
Type	string, date, Meta, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, Signature, unsignedInt, time
[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()))
28. Extension.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`http://hl7.org/fhir/5.0/StructureDefinition/extension-Observation.triggeredBy`
30. Extension.value[x]
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Control	0..01
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
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()))

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

0. Extension
Definition	R5: `Observation.triggeredBy` (new:BackboneElement)
Short	R5: Triggering observation(s) (new)
Comments	Element `Observation.triggeredBy` has a context of Observation based on following the parent source element upwards and mapping to `Observation`. Element `Observation.triggeredBy` has no mapping targets in FHIR R4. Typically, this is because the element has been added (is a new element).
2. Extension.extension
Control	2..?
4. Extension.extension:observation
Slice Name	observation
Definition	R5: `Observation.triggeredBy.observation` (new:Reference(Observation))
Short	R5: Triggering observation (new)
Comments	Element `Observation.triggeredBy.observation` is part of an existing definition because parent element `Observation.triggeredBy` requires a cross-version extension. Element `Observation.triggeredBy.observation` has a context of Observation based on following the parent source element upwards and mapping to `Observation`. Element `Observation.triggeredBy.observation` has no mapping targets in FHIR R4. Typically, this is because the element has been added (is a new element).
Control	1..1
Requirements	Element `Observation.triggeredBy.observation` is part of an existing definition because parent element `Observation.triggeredBy` requires a cross-version extension. Element `Observation.triggeredBy.observation` has a context of Observation based on following the parent source element upwards and mapping to `Observation`. Element `Observation.triggeredBy.observation` has no mapping targets in FHIR R4. Typically, this is because the element has been added (is a new element).
6. Extension.extension:observation.extension
Control	0..0
8. Extension.extension:observation.url
Fixed Value	`observation`
10. Extension.extension:observation.value[x]
Definition	Reference to the triggering observation.
Short	Triggering observation
Control	1..?
Type	Reference(Observation)
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
12. Extension.extension:type
Slice Name	type
Definition	R5: `Observation.triggeredBy.type` (new:code)
Short	R5: reflex \| repeat \| re-run (new)
Comments	Element `Observation.triggeredBy.type` is part of an existing definition because parent element `Observation.triggeredBy` requires a cross-version extension. Element `Observation.triggeredBy.type` has a context of Observation based on following the parent source element upwards and mapping to `Observation`. Element `Observation.triggeredBy.type` has no mapping targets in FHIR R4. Typically, this is because the element has been added (is a new element).
Control	1..1
Requirements	Element `Observation.triggeredBy.type` is part of an existing definition because parent element `Observation.triggeredBy` requires a cross-version extension. Element `Observation.triggeredBy.type` has a context of Observation based on following the parent source element upwards and mapping to `Observation`. Element `Observation.triggeredBy.type` has no mapping targets in FHIR R4. Typically, this is because the element has been added (is a new element).
14. Extension.extension:type.extension
Control	0..0
16. Extension.extension:type.url
Fixed Value	`type`
18. Extension.extension:type.value[x]
Definition	The type of trigger. Reflex \| Repeat \| Re-run.
Short	reflex \| repeat \| re-run
Control	1..?
Binding	The codes SHALL be taken from R5ObservationTriggeredbytypeForR4 (0.1.0) (required to `http://hl7.org/fhir/uv/xver/ValueSet/R5-observation-triggeredbytype-for-R4\|0.1.0`) The type of TriggeredBy Observation.
Type	code
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
20. Extension.extension:reason
Slice Name	reason
Definition	R5: `Observation.triggeredBy.reason` (new:string)
Short	R5: Reason that the observation was triggered (new)
Comments	Element `Observation.triggeredBy.reason` is part of an existing definition because parent element `Observation.triggeredBy` requires a cross-version extension. Element `Observation.triggeredBy.reason` has a context of Observation based on following the parent source element upwards and mapping to `Observation`. Element `Observation.triggeredBy.reason` has no mapping targets in FHIR R4. Typically, this is because the element has been added (is a new element).
Control	0..1
Requirements	Element `Observation.triggeredBy.reason` is part of an existing definition because parent element `Observation.triggeredBy` requires a cross-version extension. Element `Observation.triggeredBy.reason` has a context of Observation based on following the parent source element upwards and mapping to `Observation`. Element `Observation.triggeredBy.reason` has no mapping targets in FHIR R4. Typically, this is because the element has been added (is a new element).
22. Extension.extension:reason.extension
Control	0..0
24. Extension.extension:reason.url
Fixed Value	`reason`
26. Extension.extension:reason.value[x]
Definition	Provides the reason why this observation was performed as a result of the observation(s) referenced.
Short	Reason that the observation was triggered
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
28. Extension.url
Fixed Value	`http://hl7.org/fhir/5.0/StructureDefinition/extension-Observation.triggeredBy`
30. Extension.value[x]
Control	0..0

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

0. Extension
Definition	R5: `Observation.triggeredBy` (new:BackboneElement)
Short	R5: Triggering observation(s) (new)
Comments	Element `Observation.triggeredBy` has a context of Observation based on following the parent source element upwards and mapping to `Observation`. Element `Observation.triggeredBy` has no mapping targets in FHIR R4. Typically, this is because the element has been added (is a new element).
Control	0..* This element is affected by the following invariants: ele-1
Is Modifier	false
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()`)
2. Extension.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
4. Extension.extension
Definition	An Extension
Short	Extension
Control	2..*
Type	Extension
Is Modifier	false
Summary	false
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 `Extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
6. Extension.extension:observation
Slice Name	observation
Definition	R5: `Observation.triggeredBy.observation` (new:Reference(Observation))
Short	R5: Triggering observation (new)
Comments	Element `Observation.triggeredBy.observation` is part of an existing definition because parent element `Observation.triggeredBy` requires a cross-version extension. Element `Observation.triggeredBy.observation` has a context of Observation based on following the parent source element upwards and mapping to `Observation`. Element `Observation.triggeredBy.observation` has no mapping targets in FHIR R4. Typically, this is because the element has been added (is a new element).
Control	1..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `Observation.triggeredBy.observation` is part of an existing definition because parent element `Observation.triggeredBy` requires a cross-version extension. Element `Observation.triggeredBy.observation` has a context of Observation based on following the parent source element upwards and mapping to `Observation`. Element `Observation.triggeredBy.observation` has no mapping targets in FHIR R4. Typically, this is because the element has been added (is a new element).
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()`)
8. Extension.extension:observation.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
10. Extension.extension:observation.extension
Definition	An Extension
Short	Extension
Control	0..0
Type	Extension
Is Modifier	false
Summary	false
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 `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
12. Extension.extension:observation.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`observation`
14. Extension.extension:observation.value[x]
Definition	Reference to the triggering observation.
Short	Triggering observation
Control	1..1
Type	Reference(Observation)
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
16. Extension.extension:type
Slice Name	type
Definition	R5: `Observation.triggeredBy.type` (new:code)
Short	R5: reflex \| repeat \| re-run (new)
Comments	Element `Observation.triggeredBy.type` is part of an existing definition because parent element `Observation.triggeredBy` requires a cross-version extension. Element `Observation.triggeredBy.type` has a context of Observation based on following the parent source element upwards and mapping to `Observation`. Element `Observation.triggeredBy.type` has no mapping targets in FHIR R4. Typically, this is because the element has been added (is a new element).
Control	1..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `Observation.triggeredBy.type` is part of an existing definition because parent element `Observation.triggeredBy` requires a cross-version extension. Element `Observation.triggeredBy.type` has a context of Observation based on following the parent source element upwards and mapping to `Observation`. Element `Observation.triggeredBy.type` has no mapping targets in FHIR R4. Typically, this is because the element has been added (is a new element).
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. Extension.extension: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.
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
20. Extension.extension:type.extension
Definition	An Extension
Short	Extension
Control	0..0
Type	Extension
Is Modifier	false
Summary	false
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 `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
22. Extension.extension:type.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`type`
24. Extension.extension:type.value[x]
Definition	The type of trigger. Reflex \| Repeat \| Re-run.
Short	reflex \| repeat \| re-run
Control	1..1
Binding	The codes SHALL be taken from R5ObservationTriggeredbytypeForR4 (0.1.0) (required to `http://hl7.org/fhir/uv/xver/ValueSet/R5-observation-triggeredbytype-for-R4\|0.1.0`) The type of TriggeredBy Observation.
Type	code
[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())`)
26. Extension.extension:reason
Slice Name	reason
Definition	R5: `Observation.triggeredBy.reason` (new:string)
Short	R5: Reason that the observation was triggered (new)
Comments	Element `Observation.triggeredBy.reason` is part of an existing definition because parent element `Observation.triggeredBy` requires a cross-version extension. Element `Observation.triggeredBy.reason` has a context of Observation based on following the parent source element upwards and mapping to `Observation`. Element `Observation.triggeredBy.reason` has no mapping targets in FHIR R4. Typically, this is because the element has been added (is a new element).
Control	0..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `Observation.triggeredBy.reason` is part of an existing definition because parent element `Observation.triggeredBy` requires a cross-version extension. Element `Observation.triggeredBy.reason` has a context of Observation based on following the parent source element upwards and mapping to `Observation`. Element `Observation.triggeredBy.reason` has no mapping targets in FHIR R4. Typically, this is because the element has been added (is a new element).
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()`)
28. Extension.extension:reason.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
30. Extension.extension:reason.extension
Definition	An Extension
Short	Extension
Control	0..0
Type	Extension
Is Modifier	false
Summary	false
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 `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
32. Extension.extension:reason.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`reason`
34. Extension.extension:reason.value[x]
Definition	Provides the reason why this observation was performed as a result of the observation(s) referenced.
Short	Reason that the observation was triggered
Control	0..1
Type	string
[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())`)
36. Extension.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`http://hl7.org/fhir/5.0/StructureDefinition/extension-Observation.triggeredBy`
38. Extension.value[x]
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Control	0..0
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
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())`)