Name	Flags	Card.	Type	Description & Constraints    Filter: Bindings Constraints Obligations
Observation	C	0..*	Observation	Measurements and simple assertions Constraints: obs-6, obs-7
identifier	Σ	1..*	Identifier	Business Identifier for observation
use	?!Σ	1..1	code	usual | official | temp | secondary | old (If known) Binding: IdentifierUse (required): Identifies the purpose for this identifier, if known .
value	Σ	1..1	string	The value that is unique Example General: 123456
basedOn	Σ	0..*	Reference(ServiceRequest)	Fulfills plan, proposal or order
status	?!Σ	1..1	code	registered | preliminary | final | amended + Binding: ObservationStatus (required): Codes providing the status of an observation.
category		1..1	CodeableConcept	Classification of type of observation Binding: ObservationCategoryCodes (required)
code	Σ	1..1	CodeableConcept	Type of observation (code / type) Binding: LOINCCodes (example)
subject	Σ	0..1	Reference(Patient)	Who and/or what the observation is about
Slices for effective[x]	Σ	1..1	dateTime	Clinically relevant time/time-period for observation Slice: Unordered, Closed by type:$this
effective[x]:effectiveDateTime	Σ	1..1	dateTime	Must be in UTC timezone on the FHIR server
issued	Σ	1..1	instant	Must be in UTC timezone on the FHIR server
performer	Σ	0..*	Reference(Patient | Practitioner)	Who is responsible for the observation
Documentation for this format

Terminology Bindings

Path	Conformance	ValueSet	URI
Observation.identifier.use	required	IdentifierUse http://hl7.org/fhir/ValueSet/identifier-use|4.0.1 From the FHIR Standard
Observation.status	required	ObservationStatus http://hl7.org/fhir/ValueSet/observation-status|4.0.1 From the FHIR Standard
Observation.category	required	ObservationCategoryCodes http://hl7.org/fhir/ValueSet/observation-category From the FHIR Standard
Observation.code	example	LOINCCodes(a valid code from LOINC) http://hl7.org/fhir/ValueSet/observation-codes From the FHIR Standard

Constraints

Id	Grade	Path(s)	Details	Requirements
dom-2	error	Observation	If the resource is contained in another resource, it SHALL NOT contain nested Resources : contained.contained.empty()
dom-3	error	Observation	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	error	Observation	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	error	Observation	If a resource is contained in another resource, it SHALL NOT have a security label : contained.meta.security.empty()
dom-6	best practice	Observation	A resource should have narrative for robust management : text.`div`.exists()
ele-1	error	**ALL** elements	All FHIR elements must have a @value or children : hasValue() or (children().count() > id.count())
ext-1	error	**ALL** extensions	Must have either extensions or value[x], not both : extension.exists() != value.exists()
obs-6	error	Observation	dataAbsentReason SHALL only be present if Observation.value[x] is not present : dataAbsentReason.empty() or value.empty()
obs-7	error	Observation	If Observation.code is the same as an Observation.component.code then the value element associated with the code SHALL NOT be present : value.empty() or component.code.where(coding.intersect(%resource.code.coding).exists()).empty()

Name	Flags	Card.	Type	Description & Constraints    Filter: Bindings Constraints Obligations
Observation		0..*	Observation	Measurements and simple assertions
implicitRules		0..0
language		0..0
modifierExtension		0..0
identifier		1..*	Identifier	Business Identifier for observation
use		1..1	code	usual | official | temp | secondary | old (If known)
value		1..1	string	The value that is unique
basedOn		0..*	Reference(ServiceRequest)	Fulfills plan, proposal or order
partOf		0..0
category		1..1	CodeableConcept	Classification of type of observation Binding: ObservationCategoryCodes (required)
code		1..1	CodeableConcept	Type of observation (code / type) Binding: LOINCCodes (example)
subject		0..1	Reference(Patient)	Who and/or what the observation is about
focus		0..0
Slices for effective[x]		1..1	dateTime	Clinically relevant time/time-period for observation Slice: Unordered, Open by type:$this
effective[x]:effectiveDateTime		1..1	dateTime	Must be in UTC timezone on the FHIR server
issued		1..1	instant	Must be in UTC timezone on the FHIR server
performer		0..*	Reference(Patient | Practitioner)	Who is responsible for the observation
value[x]		0..0
dataAbsentReason		0..0
interpretation		0..0
bodySite		0..0
method		0..0
specimen		0..0
device		0..0
referenceRange		0..0
hasMember		0..0
derivedFrom		0..0
component
Slices for value[x]		0..1	Quantity, CodeableConcept, string, boolean, integer, Range, Ratio, SampledData, time, dateTime, Period	Actual component result Slice: Unordered, Open by type:$this
value[x]:valueCodeableConcept		0..1	CodeableConcept	Actual component result
value[x]:valueQuantity		0..1	Quantity	Actual component result
Documentation for this format

Terminology Bindings (Differential)

Path	Conformance	ValueSet	URI
Observation.category	required	ObservationCategoryCodes http://hl7.org/fhir/ValueSet/observation-category From the FHIR Standard
Observation.code	example	LOINCCodes(a valid code from LOINC) http://hl7.org/fhir/ValueSet/observation-codes From the FHIR Standard

Name	Flags	Card.	Type	Description & Constraints    Filter: Bindings Constraints Obligations
Observation	C	0..*	Observation	Measurements and simple assertions Constraints: obs-6, obs-7
id	Σ	0..1	id	Logical id of this artifact
meta	Σ	0..1	Meta	Metadata about the resource
text		0..1	Narrative	Text summary of the resource, for human interpretation
contained		0..*	Resource	Contained, inline Resources
extension		0..*	Extension	Additional content defined by implementations
identifier	Σ	1..*	Identifier	Business Identifier for observation
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations Slice: Unordered, Open by value:url
use	?!Σ	1..1	code	usual | official | temp | secondary | old (If known) Binding: IdentifierUse (required): Identifies the purpose for this identifier, if known .
type	Σ	0..1	CodeableConcept	Description of identifier Binding: Identifier Type Codes (extensible): A coded type for an identifier that can be used to determine which identifier to use for a specific purpose.
system	Σ	0..1	uri	The namespace for the identifier value Example General: http://www.acme.com/identifiers/patient
value	Σ	1..1	string	The value that is unique Example General: 123456
period	Σ	0..1	Period	Time period when id is/was valid for use
assigner	Σ	0..1	Reference(Organization)	Organization that issued id (may be just text)
basedOn	Σ	0..*	Reference(ServiceRequest)	Fulfills plan, proposal or order
status	?!Σ	1..1	code	registered | preliminary | final | amended + Binding: ObservationStatus (required): Codes providing the status of an observation.
category		1..1	CodeableConcept	Classification of type of observation Binding: ObservationCategoryCodes (required)
code	Σ	1..1	CodeableConcept	Type of observation (code / type) Binding: LOINCCodes (example)
subject	Σ	0..1	Reference(Patient)	Who and/or what the observation is about
encounter	Σ	0..1	Reference(Encounter)	Healthcare event during which this observation is made
Slices for effective[x]	Σ	1..1	dateTime	Clinically relevant time/time-period for observation Slice: Unordered, Closed by type:$this
effective[x]:effectiveDateTime	Σ	1..1	dateTime	Must be in UTC timezone on the FHIR server
issued	Σ	1..1	instant	Must be in UTC timezone on the FHIR server
performer	Σ	0..*	Reference(Patient | Practitioner)	Who is responsible for the observation
note		0..*	Annotation	Comments about the observation
component	Σ	0..*	BackboneElement	Component results
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized
code	Σ	1..1	CodeableConcept	Type of component observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations.
Slices for value[x]	Σ	0..1		Actual component result Slice: Unordered, Open by type:$this
valueQuantity			Quantity
valueCodeableConcept			CodeableConcept
valueString			string
valueBoolean			boolean
valueInteger			integer
valueRange			Range
valueRatio			Ratio
valueSampledData			SampledData
valueTime			time
valueDateTime			dateTime
valuePeriod			Period
value[x]:valueCodeableConcept	Σ	0..1	CodeableConcept	Actual component result
value[x]:valueQuantity	Σ	0..1	Quantity	Actual component result
dataAbsentReason	C	0..1	CodeableConcept	Why the component result is missing Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
interpretation		0..*	CodeableConcept	High, low, normal, etc. Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
referenceRange		0..*	See referenceRange (Observation)	Provides guide for interpretation of component result
Documentation for this format

Terminology Bindings

Path	Conformance	ValueSet	URI
Observation.identifier.use	required	IdentifierUse http://hl7.org/fhir/ValueSet/identifier-use|4.0.1 From the FHIR Standard
Observation.identifier.type	extensible	Identifier Type Codes http://hl7.org/fhir/ValueSet/identifier-type From the FHIR Standard
Observation.status	required	ObservationStatus http://hl7.org/fhir/ValueSet/observation-status|4.0.1 From the FHIR Standard
Observation.category	required	ObservationCategoryCodes http://hl7.org/fhir/ValueSet/observation-category From the FHIR Standard
Observation.code	example	LOINCCodes(a valid code from LOINC) http://hl7.org/fhir/ValueSet/observation-codes From the FHIR Standard
Observation.referenceRange.type	preferred	ObservationReferenceRangeMeaningCodes http://hl7.org/fhir/ValueSet/referencerange-meaning From the FHIR Standard
Observation.referenceRange.appliesTo	example	ObservationReferenceRangeAppliesToCodes http://hl7.org/fhir/ValueSet/referencerange-appliesto From the FHIR Standard
Observation.component.code	example	LOINCCodes(a valid code from LOINC) http://hl7.org/fhir/ValueSet/observation-codes From the FHIR Standard
Observation.component.dataAbsentReason	extensible	DataAbsentReason http://hl7.org/fhir/ValueSet/data-absent-reason From the FHIR Standard
Observation.component.interpretation	extensible	ObservationInterpretationCodes http://hl7.org/fhir/ValueSet/observation-interpretation From the FHIR Standard

Constraints

Id	Grade	Path(s)	Details	Requirements
dom-2	error	Observation	If the resource is contained in another resource, it SHALL NOT contain nested Resources : contained.contained.empty()
dom-3	error	Observation	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	error	Observation	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	error	Observation	If a resource is contained in another resource, it SHALL NOT have a security label : contained.meta.security.empty()
dom-6	best practice	Observation	A resource should have narrative for robust management : text.`div`.exists()
ele-1	error	**ALL** elements	All FHIR elements must have a @value or children : hasValue() or (children().count() > id.count())
ext-1	error	**ALL** extensions	Must have either extensions or value[x], not both : extension.exists() != value.exists()
obs-6	error	Observation	dataAbsentReason SHALL only be present if Observation.value[x] is not present : dataAbsentReason.empty() or value.empty()
obs-7	error	Observation	If Observation.code is the same as an Observation.component.code then the value element associated with the code SHALL NOT be present : value.empty() or component.code.where(coding.intersect(%resource.code.coding).exists()).empty()

Summary

Mandatory: 7 elements
Prohibited: 15 elements

Slices

This structure defines the following Slices:

• The element 1 is sliced based on the value of Observation.effective[x]
• The element 1 is sliced based on the value of Observation.component.value[x]

Name	Flags	Card.	Type	Description & Constraints    Filter: Bindings Constraints Obligations
Observation	C	0..*	Observation	Measurements and simple assertions Constraints: obs-6, obs-7
identifier	Σ	1..*	Identifier	Business Identifier for observation
use	?!Σ	1..1	code	usual | official | temp | secondary | old (If known) Binding: IdentifierUse (required): Identifies the purpose for this identifier, if known .
value	Σ	1..1	string	The value that is unique Example General: 123456
basedOn	Σ	0..*	Reference(ServiceRequest)	Fulfills plan, proposal or order
status	?!Σ	1..1	code	registered | preliminary | final | amended + Binding: ObservationStatus (required): Codes providing the status of an observation.
category		1..1	CodeableConcept	Classification of type of observation Binding: ObservationCategoryCodes (required)
code	Σ	1..1	CodeableConcept	Type of observation (code / type) Binding: LOINCCodes (example)
subject	Σ	0..1	Reference(Patient)	Who and/or what the observation is about
Slices for effective[x]	Σ	1..1	dateTime	Clinically relevant time/time-period for observation Slice: Unordered, Closed by type:$this
effective[x]:effectiveDateTime	Σ	1..1	dateTime	Must be in UTC timezone on the FHIR server
issued	Σ	1..1	instant	Must be in UTC timezone on the FHIR server
performer	Σ	0..*	Reference(Patient | Practitioner)	Who is responsible for the observation
Documentation for this format

Terminology Bindings

Path	Conformance	ValueSet	URI
Observation.identifier.use	required	IdentifierUse http://hl7.org/fhir/ValueSet/identifier-use|4.0.1 From the FHIR Standard
Observation.status	required	ObservationStatus http://hl7.org/fhir/ValueSet/observation-status|4.0.1 From the FHIR Standard
Observation.category	required	ObservationCategoryCodes http://hl7.org/fhir/ValueSet/observation-category From the FHIR Standard
Observation.code	example	LOINCCodes(a valid code from LOINC) http://hl7.org/fhir/ValueSet/observation-codes From the FHIR Standard

Constraints

Id	Grade	Path(s)	Details	Requirements
dom-2	error	Observation	If the resource is contained in another resource, it SHALL NOT contain nested Resources : contained.contained.empty()
dom-3	error	Observation	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	error	Observation	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	error	Observation	If a resource is contained in another resource, it SHALL NOT have a security label : contained.meta.security.empty()
dom-6	best practice	Observation	A resource should have narrative for robust management : text.`div`.exists()
ele-1	error	**ALL** elements	All FHIR elements must have a @value or children : hasValue() or (children().count() > id.count())
ext-1	error	**ALL** extensions	Must have either extensions or value[x], not both : extension.exists() != value.exists()
obs-6	error	Observation	dataAbsentReason SHALL only be present if Observation.value[x] is not present : dataAbsentReason.empty() or value.empty()
obs-7	error	Observation	If Observation.code is the same as an Observation.component.code then the value element associated with the code SHALL NOT be present : value.empty() or component.code.where(coding.intersect(%resource.code.coding).exists()).empty()

Name	Flags	Card.	Type	Description & Constraints    Filter: Bindings Constraints Obligations
Observation		0..*	Observation	Measurements and simple assertions
implicitRules		0..0
language		0..0
modifierExtension		0..0
identifier		1..*	Identifier	Business Identifier for observation
use		1..1	code	usual | official | temp | secondary | old (If known)
value		1..1	string	The value that is unique
basedOn		0..*	Reference(ServiceRequest)	Fulfills plan, proposal or order
partOf		0..0
category		1..1	CodeableConcept	Classification of type of observation Binding: ObservationCategoryCodes (required)
code		1..1	CodeableConcept	Type of observation (code / type) Binding: LOINCCodes (example)
subject		0..1	Reference(Patient)	Who and/or what the observation is about
focus		0..0
Slices for effective[x]		1..1	dateTime	Clinically relevant time/time-period for observation Slice: Unordered, Open by type:$this
effective[x]:effectiveDateTime		1..1	dateTime	Must be in UTC timezone on the FHIR server
issued		1..1	instant	Must be in UTC timezone on the FHIR server
performer		0..*	Reference(Patient | Practitioner)	Who is responsible for the observation
value[x]		0..0
dataAbsentReason		0..0
interpretation		0..0
bodySite		0..0
method		0..0
specimen		0..0
device		0..0
referenceRange		0..0
hasMember		0..0
derivedFrom		0..0
component
Slices for value[x]		0..1	Quantity, CodeableConcept, string, boolean, integer, Range, Ratio, SampledData, time, dateTime, Period	Actual component result Slice: Unordered, Open by type:$this
value[x]:valueCodeableConcept		0..1	CodeableConcept	Actual component result
value[x]:valueQuantity		0..1	Quantity	Actual component result
Documentation for this format

Terminology Bindings (Differential)

Path	Conformance	ValueSet	URI
Observation.category	required	ObservationCategoryCodes http://hl7.org/fhir/ValueSet/observation-category From the FHIR Standard
Observation.code	example	LOINCCodes(a valid code from LOINC) http://hl7.org/fhir/ValueSet/observation-codes From the FHIR Standard

Name	Flags	Card.	Type	Description & Constraints    Filter: Bindings Constraints Obligations
Observation	C	0..*	Observation	Measurements and simple assertions Constraints: obs-6, obs-7
id	Σ	0..1	id	Logical id of this artifact
meta	Σ	0..1	Meta	Metadata about the resource
text		0..1	Narrative	Text summary of the resource, for human interpretation
contained		0..*	Resource	Contained, inline Resources
extension		0..*	Extension	Additional content defined by implementations
identifier	Σ	1..*	Identifier	Business Identifier for observation
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations Slice: Unordered, Open by value:url
use	?!Σ	1..1	code	usual | official | temp | secondary | old (If known) Binding: IdentifierUse (required): Identifies the purpose for this identifier, if known .
type	Σ	0..1	CodeableConcept	Description of identifier Binding: Identifier Type Codes (extensible): A coded type for an identifier that can be used to determine which identifier to use for a specific purpose.
system	Σ	0..1	uri	The namespace for the identifier value Example General: http://www.acme.com/identifiers/patient
value	Σ	1..1	string	The value that is unique Example General: 123456
period	Σ	0..1	Period	Time period when id is/was valid for use
assigner	Σ	0..1	Reference(Organization)	Organization that issued id (may be just text)
basedOn	Σ	0..*	Reference(ServiceRequest)	Fulfills plan, proposal or order
status	?!Σ	1..1	code	registered | preliminary | final | amended + Binding: ObservationStatus (required): Codes providing the status of an observation.
category		1..1	CodeableConcept	Classification of type of observation Binding: ObservationCategoryCodes (required)
code	Σ	1..1	CodeableConcept	Type of observation (code / type) Binding: LOINCCodes (example)
subject	Σ	0..1	Reference(Patient)	Who and/or what the observation is about
encounter	Σ	0..1	Reference(Encounter)	Healthcare event during which this observation is made
Slices for effective[x]	Σ	1..1	dateTime	Clinically relevant time/time-period for observation Slice: Unordered, Closed by type:$this
effective[x]:effectiveDateTime	Σ	1..1	dateTime	Must be in UTC timezone on the FHIR server
issued	Σ	1..1	instant	Must be in UTC timezone on the FHIR server
performer	Σ	0..*	Reference(Patient | Practitioner)	Who is responsible for the observation
note		0..*	Annotation	Comments about the observation
component	Σ	0..*	BackboneElement	Component results
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized
code	Σ	1..1	CodeableConcept	Type of component observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations.
Slices for value[x]	Σ	0..1		Actual component result Slice: Unordered, Open by type:$this
valueQuantity			Quantity
valueCodeableConcept			CodeableConcept
valueString			string
valueBoolean			boolean
valueInteger			integer
valueRange			Range
valueRatio			Ratio
valueSampledData			SampledData
valueTime			time
valueDateTime			dateTime
valuePeriod			Period
value[x]:valueCodeableConcept	Σ	0..1	CodeableConcept	Actual component result
value[x]:valueQuantity	Σ	0..1	Quantity	Actual component result
dataAbsentReason	C	0..1	CodeableConcept	Why the component result is missing Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
interpretation		0..*	CodeableConcept	High, low, normal, etc. Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
referenceRange		0..*	See referenceRange (Observation)	Provides guide for interpretation of component result
Documentation for this format

Terminology Bindings

Path	Conformance	ValueSet	URI
Observation.identifier.use	required	IdentifierUse http://hl7.org/fhir/ValueSet/identifier-use|4.0.1 From the FHIR Standard
Observation.identifier.type	extensible	Identifier Type Codes http://hl7.org/fhir/ValueSet/identifier-type From the FHIR Standard
Observation.status	required	ObservationStatus http://hl7.org/fhir/ValueSet/observation-status|4.0.1 From the FHIR Standard
Observation.category	required	ObservationCategoryCodes http://hl7.org/fhir/ValueSet/observation-category From the FHIR Standard
Observation.code	example	LOINCCodes(a valid code from LOINC) http://hl7.org/fhir/ValueSet/observation-codes From the FHIR Standard
Observation.referenceRange.type	preferred	ObservationReferenceRangeMeaningCodes http://hl7.org/fhir/ValueSet/referencerange-meaning From the FHIR Standard
Observation.referenceRange.appliesTo	example	ObservationReferenceRangeAppliesToCodes http://hl7.org/fhir/ValueSet/referencerange-appliesto From the FHIR Standard
Observation.component.code	example	LOINCCodes(a valid code from LOINC) http://hl7.org/fhir/ValueSet/observation-codes From the FHIR Standard
Observation.component.dataAbsentReason	extensible	DataAbsentReason http://hl7.org/fhir/ValueSet/data-absent-reason From the FHIR Standard
Observation.component.interpretation	extensible	ObservationInterpretationCodes http://hl7.org/fhir/ValueSet/observation-interpretation From the FHIR Standard

Constraints

Id	Grade	Path(s)	Details	Requirements
dom-2	error	Observation	If the resource is contained in another resource, it SHALL NOT contain nested Resources : contained.contained.empty()
dom-3	error	Observation	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	error	Observation	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	error	Observation	If a resource is contained in another resource, it SHALL NOT have a security label : contained.meta.security.empty()
dom-6	best practice	Observation	A resource should have narrative for robust management : text.`div`.exists()
ele-1	error	**ALL** elements	All FHIR elements must have a @value or children : hasValue() or (children().count() > id.count())
ext-1	error	**ALL** extensions	Must have either extensions or value[x], not both : extension.exists() != value.exists()
obs-6	error	Observation	dataAbsentReason SHALL only be present if Observation.value[x] is not present : dataAbsentReason.empty() or value.empty()
obs-7	error	Observation	If Observation.code is the same as an Observation.component.code then the value element associated with the code SHALL NOT be present : value.empty() or component.code.where(coding.intersect(%resource.code.coding).exists()).empty()

Summary

Mandatory: 7 elements
Prohibited: 15 elements

Slices

This structure defines the following Slices:

• The element 1 is sliced based on the value of Observation.effective[x]
• The element 1 is sliced based on the value of Observation.component.value[x]