Smart Health Checks
0.4.0 - ci-build

Smart Health Checks, published by AEHRC CSIRO. This guide is not an authorized publication; it is the continuous build for version 0.4.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/aehrc/smart-forms-ig/ and changes regularly. See the Directory of published versions

## Resource Profile: Smart Health Checks Head Circumference

Official URL: https://smartforms.csiro.au/ig/StructureDefinition/SHCHeadCircumference | Version: 0.4.0
Draft as of 2025-12-18 | Computable Name: SmartHealthChecksHeadCircumference
Copyright/Legal: Copyright © 2022+ Australian Government Department of Health and Aged Care - All rights reserved. This content is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License. See https://creativecommons.org/licenses/by-sa/4.0/.

This profile sets the minimum expectations for a Head Circumference resource to record, search and save head circumference information when used within Smart Health Checks.

Usages:

- Use this Profile: Smart Health Checks Extract Bundle
- CapabilityStatements using this Profile: SHC App and SHC Host FHIR Server

You can also check for usages in the FHIR IG Statistics

### Formal Views of Profile Content

Description of Profiles, Differentials, Snapshots and how the different presentations work.

- Key Elements Table
- Differential Table
- Snapshot Table
- Statistics/References
- All

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Observation | C | 0..* | AUCoreHeadCircumference | Head circumference Constraints: obs-6, obs-7, vs-2, au-core-obs-02
implicitRules | ?!Σ | 0..1 | uri | A set of rules under which this content was created
modifierExtension | ?! | 0..* | Extension | Extensions that cannot be ignored
status | ?!SO Σ | 1..1 | code | registered | preliminary | final | amended + Binding: ObservationStatus (required) Fixed Value: final
Obligations | Actor
SHALL:populate & SHALL:persist | SHC Host FHIR Server
SHALL:populate & SHALL:process | SHC App
Slices for category | S | 1..* | CodeableConcept | Classification of type of observation Slice: Unordered, Open by value:coding.code, value:coding.system Binding: ObservationCategoryCodes (preferred): Codes for high level observation categories.
category:VSCat | SO | 1..1 | CodeableConcept | Classification of type of observation Binding: ObservationCategoryCodes (preferred): Codes for high level observation categories.
Obligations | Actor
SHALL:persist | SHC Host FHIR Server
SHALL:populate | SHC App
coding | S Σ | 1..* | Coding | Code defined by a terminology system
system | S Σ | 1..1 | uri | Identity of the terminology system Fixed Value: http://terminology.hl7.org/CodeSystem/observation-category
code | S Σ | 1..1 | code | Symbol in syntax defined by the system Fixed Value: vital-signs
code | S Σ | 1..1 | CodeableConcept | Head Circumference Binding: VitalSigns (extensible): This identifies the vital sign result type.
Slices for coding | Σ | 2..* | Coding | Code defined by a terminology system Slice: Unordered, Open by value:code, value:system
coding:HeadCircumCode | SO Σ | 1..1 | Coding | Code defined by a terminology system
Obligations | Actor
SHALL:populate & SHALL:persist | SHC Host FHIR Server
SHALL:populate & SHALL:process | SHC App
system | Σ | 1..1 | uri | Identity of the terminology system Fixed Value: http://loinc.org
code | Σ | 1..1 | code | Symbol in syntax defined by the system Fixed Value: 9843-4
coding:snomedHeadCircumCode | SO Σ | 1..1 | Coding | SNOMED CT Head Circumference
Obligations | Actor
SHALL:persist | SHC Host FHIR Server
SHALL:populate | SHC App
system | Σ | 1..1 | uri | Identity of the terminology system Fixed Value: http://snomed.info/sct
code | Σ | 1..1 | code | Symbol in syntax defined by the system Fixed Value: 363812007
text | SO Σ | 0..1 | string | Plain text representation of the concept
Obligations | Actor
SHALL:populate | SHC App
subject | SO Σ | 1..1 | Reference(AU Core Patient) | Who and/or what the observation is about
Obligations | Actor
SHALL:populate & SHALL:persist | SHC Host FHIR Server
SHALL:populate | SHC App
encounter | S Σ | 0..1 | Reference(AU Core Encounter) | Healthcare event during which this observation is made
effective[x] | SO Σ C | 1..1 | dateTime | Date, and optionally time, the observation was performed Constraints: vs-1, au-core-obs-01
Obligations | Actor
SHALL:populate & SHALL:persist | SHC Host FHIR Server
SHALL:populate-if-known & SHALL:process | SHC App
performer | S Σ | 0..* | Reference(AU Core Practitioner | AU Core PractitionerRole | AU Core Organization | AU Core Patient | AU Core RelatedPerson) | Who is responsible for the observation
Slices for value[x] | S Σ C | 0..1 | Quantity | Vital Signs value are recorded using the Quantity data type. For supporting observations such as Cuff size could use other datatypes such as CodeableConcept. Slice: Unordered, Closed by type:$this
value[x]:valueQuantity | SO Σ C | 0..1 | Quantity | Head circumference
Obligations | Actor
SHALL:populate-if-known & SHALL:persist | SHC Host FHIR Server
SHALL:populate & SHALL:process | SHC App
value | SO Σ | 1..1 | decimal | Numerical value (with implicit precision)
Obligations | Actor
SHALL:populate-if-known & SHALL:persist | SHC Host FHIR Server
SHALL:populate & SHALL:process | SHC App
comparator | ?!Σ | 0..1 | code | < | <= | >= | > - how to understand the value Binding: QuantityComparator (required): How the Quantity should be understood and represented.
unit | SO Σ | 1..1 | string | Unit representation
Obligations | Actor
SHALL:populate-if-known & SHALL:process | SHC Host FHIR Server
SHALL:populate | SHC App
system | SO Σ C | 1..1 | uri | System that defines coded unit form Fixed Value: http://unitsofmeasure.org
Obligations | Actor
SHALL:populate-if-known & SHALL:persist | SHC Host FHIR Server
SHALL:populate & SHALL:process | SHC App
code | SO Σ | 1..1 | code | Coded responses from the common UCUM units for vital signs value set. Binding: Metric Body Length Units (required)
Obligations | Actor
SHALL:populate-if-known & SHALL:persist | SHC Host FHIR Server
SHALL:populate & SHALL:process | SHC App
dataAbsentReason | S C | 0..1 | CodeableConcept | Why the result is missing Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
component | S Σ C | 0..* | BackboneElement | Used when reporting systolic and diastolic blood pressure. Constraints: vs-3
modifierExtension | ?!Σ | 0..* | Extension | Extensions that cannot be ignored even if unrecognized
code | S Σ | 1..1 | CodeableConcept | Type of component observation (code / type) Binding: VitalSigns (extensible): This identifies the vital sign result type.
value[x] | S Σ C | 0..1 |  | Vital Sign Value recorded with UCUM Binding: VitalSignsUnits (required): Common UCUM units for recording Vital Signs.
valueQuantity |  |  | Quantity |
valueCodeableConcept |  |  | CodeableConcept |
valueString |  |  | string |
valueBoolean |  |  | boolean |
valueInteger |  |  | integer |
valueRange |  |  | Range |
valueRatio |  |  | Ratio |
valueSampledData |  |  | SampledData |
valueTime |  |  | time |
valueDateTime |  |  | dateTime |
valuePeriod |  |  | Period |
dataAbsentReason | S C | 0..1 | CodeableConcept | Why the component result is missing Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
Documentation for this format

#### Terminology Bindings

Path | Status | Usage | ValueSet | Version | Source
Observation.status | Base | required | ObservationStatus | 📍4.0.1 | FHIR Std.
Observation.category | Base | preferred | Observation Category Codes | 📦4.0.1 | FHIR Std.
Observation.category:VSCat | Base | preferred | Observation Category Codes | 📦4.0.1 | FHIR Std.
Observation.code | Base | extensible | Vital Signs | 📦4.0.1 | FHIR Std.
Observation.value[x]:valueQuantity.​comparator | Base | required | QuantityComparator | 📍4.0.1 | FHIR Std.
Observation.value[x]:valueQuantity.​code | Base | required | Metric Body Length Units | ⏿1.0.0 | tx.hl7.org.au
Observation.dataAbsentReason | Base | extensible | DataAbsentReason | 📦4.0.1 | FHIR Std.
Observation.component.​code | Base | extensible | Vital Signs | 📦4.0.1 | FHIR Std.
Observation.component.​value[x] | Base | required | Vital Signs Units | 📍4.0.1 | FHIR Std.
Observation.component.​dataAbsentReason | Base | extensible | DataAbsentReason | 📦4.0.1 | FHIR Std.

#### Constraints

Id | Grade | Path(s) | Description | Expression
au-core-obs-01 | error | Observation.effective[x] | Date shall be at least to day | `$this is DateTime implies $this.toString().length() >= 10`
au-core-obs-02 | error | Observation | At least value or data absent reason shall be present | `dataAbsentReason.exists() or value.exists()`
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()`
vs-1 | error | Observation.effective[x] | if Observation.effective[x] is dateTime and has a value then that value shall be precise to the day | `$this is dateTime implies $this.toString().length() >= 10`
vs-2 | error | Observation | If there is no component or hasMember element then either a value[x] or a data absent reason must be present. | `(component.empty() and hasMember.empty()) implies (dataAbsentReason.exists() or value.exists())`
vs-3 | error | Observation.component | If there is no a value a data absent reason must be present | `value.exists() or dataAbsentReason.exists()`

This structure is derived from AUCoreHeadCircumference

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Observation |  |  | AUCoreHeadCircumference |
status | O | 1..1 | code | registered | preliminary | final | amended +
Obligations | Actor
SHALL:populate & SHALL:persist | SHC Host FHIR Server
SHALL:populate & SHALL:process | SHC App
Slices for category |  |  |  | Content/Rules for all slices
category:VSCat | O | 1..1 | CodeableConcept | Classification of type of observation
Obligations | Actor
SHALL:persist | SHC Host FHIR Server
SHALL:populate | SHC App
code |  |  |  |
Slices for coding |  |  |  | Content/Rules for all slices
coding:HeadCircumCode | SO | 1..1 | Coding | Code defined by a terminology system
Obligations | Actor
SHALL:populate & SHALL:persist | SHC Host FHIR Server
SHALL:populate & SHALL:process | SHC App
coding:snomedHeadCircumCode | SO | 1..1 | Coding | SNOMED CT Head Circumference
Obligations | Actor
SHALL:persist | SHC Host FHIR Server
SHALL:populate | SHC App
text | SO | 0..1 | string | Plain text representation of the concept
Obligations | Actor
SHALL:populate | SHC App
subject | O | 1..1 | Reference(AU Core Patient) | Who and/or what the observation is about
Obligations | Actor
SHALL:populate & SHALL:persist | SHC Host FHIR Server
SHALL:populate | SHC App
effective[x] | O | 1..1 | dateTime | Date, and optionally time, the observation was performed
Obligations | Actor
SHALL:populate & SHALL:persist | SHC Host FHIR Server
SHALL:populate-if-known & SHALL:process | SHC App
Slices for value[x] |  |  |  | Content/Rules for all slices
value[x]:valueQuantity | O | 0..1 | Quantity | Head circumference
Obligations | Actor
SHALL:populate-if-known & SHALL:persist | SHC Host FHIR Server
SHALL:populate & SHALL:process | SHC App
value | O | 1..1 | decimal | Numerical value (with implicit precision)
Obligations | Actor
SHALL:populate-if-known & SHALL:persist | SHC Host FHIR Server
SHALL:populate & SHALL:process | SHC App
unit | O | 1..1 | string | Unit representation
Obligations | Actor
SHALL:populate-if-known & SHALL:process | SHC Host FHIR Server
SHALL:populate | SHC App
system | O | 1..1 | uri | System that defines coded unit form
Obligations | Actor
SHALL:populate-if-known & SHALL:persist | SHC Host FHIR Server
SHALL:populate & SHALL:process | SHC App
code | O | 1..1 | code | Coded responses from the common UCUM units for vital signs value set.
Obligations | Actor
SHALL:populate-if-known & SHALL:persist | SHC Host FHIR Server
SHALL:populate & SHALL:process | SHC App
Documentation for this format

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Observation | C | 0..* | AUCoreHeadCircumference | Head circumference Constraints: obs-6, obs-7, vs-2, au-core-obs-02
id | Σ | 0..1 | id | Logical id of this artifact
meta | Σ | 0..1 | Meta | Metadata about the resource
implicitRules | ?!Σ | 0..1 | uri | A set of rules under which this content was created
language |  | 0..1 | code | Language of the resource content Binding: CommonLanguages (preferred): A human language.
Additional Bindings | Purpose
AllLanguages | Max Binding
text |  | 0..1 | Narrative | Text summary of the resource, for human interpretation This profile does not constrain the narrative in regard to content, language, or traceability to data elements
contained |  | 0..* | Resource | Contained, inline Resources
extension |  | 0..* | Extension | Additional content defined by implementations
modifierExtension | ?! | 0..* | Extension | Extensions that cannot be ignored
identifier | Σ | 0..* | Identifier | Business Identifier for observation
basedOn | Σ | 0..* | Reference(CarePlan | DeviceRequest | ImmunizationRecommendation | MedicationRequest | NutritionOrder | ServiceRequest) | Fulfills plan, proposal or order
partOf | Σ | 0..* | Reference(MedicationAdministration | MedicationDispense | MedicationStatement | Procedure | Immunization | ImagingStudy) | Part of referenced event
status | ?!SO Σ | 1..1 | code | registered | preliminary | final | amended + Binding: ObservationStatus (required) Fixed Value: final
Obligations | Actor
SHALL:populate & SHALL:persist | SHC Host FHIR Server
SHALL:populate & SHALL:process | SHC App
Slices for category | S | 1..* | CodeableConcept | Classification of type of observation Slice: Unordered, Open by value:coding.code, value:coding.system Binding: ObservationCategoryCodes (preferred): Codes for high level observation categories.
category:VSCat | SO | 1..1 | CodeableConcept | Classification of type of observation Binding: ObservationCategoryCodes (preferred): Codes for high level observation categories.
Obligations | Actor
SHALL:persist | SHC Host FHIR Server
SHALL:populate | SHC App
id |  | 0..1 | string | Unique id for inter-element referencing
extension |  | 0..* | Extension | Additional content defined by implementations Slice: Unordered, Open by value:url
coding | S Σ | 1..* | Coding | Code defined by a terminology system
id |  | 0..1 | string | Unique id for inter-element referencing
extension |  | 0..* | Extension | Additional content defined by implementations Slice: Unordered, Open by value:url
system | S Σ | 1..1 | uri | Identity of the terminology system Fixed Value: http://terminology.hl7.org/CodeSystem/observation-category
version | Σ | 0..1 | string | Version of the system - if relevant
code | S Σ | 1..1 | code | Symbol in syntax defined by the system Fixed Value: vital-signs
display | Σ | 0..1 | string | Representation defined by the system
userSelected | Σ | 0..1 | boolean | If this coding was chosen directly by the user
text | Σ | 0..1 | string | Plain text representation of the concept
code | S Σ | 1..1 | CodeableConcept | Head Circumference Binding: VitalSigns (extensible): This identifies the vital sign result type.
id |  | 0..1 | string | Unique id for inter-element referencing
extension |  | 0..* | Extension | Additional content defined by implementations Slice: Unordered, Open by value:url
Slices for coding | Σ | 2..* | Coding | Code defined by a terminology system Slice: Unordered, Open by value:code, value:system
coding:HeadCircumCode | SO Σ | 1..1 | Coding | Code defined by a terminology system
Obligations | Actor
SHALL:populate & SHALL:persist | SHC Host FHIR Server
SHALL:populate & SHALL:process | SHC App
id |  | 0..1 | string | Unique id for inter-element referencing
extension |  | 0..* | Extension | Additional content defined by implementations Slice: Unordered, Open by value:url
system | Σ | 1..1 | uri | Identity of the terminology system Fixed Value: http://loinc.org
version | Σ | 0..1 | string | Version of the system - if relevant
code | Σ | 1..1 | code | Symbol in syntax defined by the system Fixed Value: 9843-4
display | Σ | 0..1 | string | Representation defined by the system
userSelected | Σ | 0..1 | boolean | If this coding was chosen directly by the user
coding:snomedHeadCircumCode | SO Σ | 1..1 | Coding | SNOMED CT Head Circumference
Obligations | Actor
SHALL:persist | SHC Host FHIR Server
SHALL:populate | SHC App
id |  | 0..1 | string | Unique id for inter-element referencing
extension |  | 0..* | Extension | Additional content defined by implementations Slice: Unordered, Open by value:url
system | Σ | 1..1 | uri | Identity of the terminology system Fixed Value: http://snomed.info/sct
version | Σ | 0..1 | string | Version of the system - if relevant
code | Σ | 1..1 | code | Symbol in syntax defined by the system Fixed Value: 363812007
display | Σ | 0..1 | string | Representation defined by the system
userSelected | Σ | 0..1 | boolean | If this coding was chosen directly by the user
text | SO Σ | 0..1 | string | Plain text representation of the concept
Obligations | Actor
SHALL:populate | SHC App
subject | SO Σ | 1..1 | Reference(AU Core Patient) | Who and/or what the observation is about
Obligations | Actor
SHALL:populate & SHALL:persist | SHC Host FHIR Server
SHALL:populate | SHC App
focus | Σ | 0..* | Reference(Resource) | What the observation is about, when it is not about the subject of record
encounter | S Σ | 0..1 | Reference(AU Core Encounter) | Healthcare event during which this observation is made
effective[x] | SO Σ C | 1..1 | dateTime | Date, and optionally time, the observation was performed Constraints: vs-1, au-core-obs-01
Obligations | Actor
SHALL:populate & SHALL:persist | SHC Host FHIR Server
SHALL:populate-if-known & SHALL:process | SHC App
issued | Σ | 0..1 | instant | Date/Time this version was made available
performer | S Σ | 0..* | Reference(AU Core Practitioner | AU Core PractitionerRole | AU Core Organization | AU Core Patient | AU Core RelatedPerson) | Who is responsible for the observation
Slices for value[x] | S Σ C | 0..1 | Quantity | Vital Signs value are recorded using the Quantity data type. For supporting observations such as Cuff size could use other datatypes such as CodeableConcept. Slice: Unordered, Closed by type:$this
value[x]:valueQuantity | SO Σ C | 0..1 | Quantity | Head circumference
Obligations | Actor
SHALL:populate-if-known & SHALL:persist | SHC Host FHIR Server
SHALL:populate & SHALL:process | SHC App
id |  | 0..1 | string | Unique id for inter-element referencing
extension |  | 0..* | Extension | Additional content defined by implementations Slice: Unordered, Open by value:url
value | SO Σ | 1..1 | decimal | Numerical value (with implicit precision)
Obligations | Actor
SHALL:populate-if-known & SHALL:persist | SHC Host FHIR Server
SHALL:populate & SHALL:process | SHC App
comparator | ?!Σ | 0..1 | code | < | <= | >= | > - how to understand the value Binding: QuantityComparator (required): How the Quantity should be understood and represented.
unit | SO Σ | 1..1 | string | Unit representation
Obligations | Actor
SHALL:populate-if-known & SHALL:process | SHC Host FHIR Server
SHALL:populate | SHC App
system | SO Σ C | 1..1 | uri | System that defines coded unit form Fixed Value: http://unitsofmeasure.org
Obligations | Actor
SHALL:populate-if-known & SHALL:persist | SHC Host FHIR Server
SHALL:populate & SHALL:process | SHC App
code | SO Σ | 1..1 | code | Coded responses from the common UCUM units for vital signs value set. Binding: Metric Body Length Units (required)
Obligations | Actor
SHALL:populate-if-known & SHALL:persist | SHC Host FHIR Server
SHALL:populate & SHALL:process | SHC App
dataAbsentReason | S C | 0..1 | CodeableConcept | Why the 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.
note |  | 0..* | Annotation | Comments about the observation
bodySite | C | 0..1 | CodeableConcept | Observed body part Binding: Body Site (preferred) Constraints: au-core-obs-04
method |  | 0..1 | CodeableConcept | How it was done Binding: ObservationMethods (example): Methods for simple observations.
specimen |  | 0..1 | Reference(Specimen) | Specimen used for this observation
device |  | 0..1 | Reference(Device | DeviceMetric) | (Measurement) Device
referenceRange | C | 0..* | BackboneElement | Provides guide for interpretation Constraints: obs-3
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
low | C | 0..1 | SimpleQuantity | Low Range, if relevant
high | C | 0..1 | SimpleQuantity | High Range, if relevant
type |  | 0..1 | CodeableConcept | Reference range qualifier Binding: ObservationReferenceRangeMeaningCodes (preferred): Code for the meaning of a reference range.
appliesTo |  | 0..* | CodeableConcept | Reference range population Binding: ObservationReferenceRangeAppliesToCodes (example): Codes identifying the population the reference range applies to.
age |  | 0..1 | Range | Applicable age range, if relevant
text |  | 0..1 | string | Text based reference range in an observation
hasMember | Σ | 0..* | Reference(QuestionnaireResponse | MolecularSequence | Vital Signs Profile) | Used when reporting vital signs panel components
derivedFrom | Σ | 0..* | Reference(DocumentReference | ImagingStudy | Media | QuestionnaireResponse | MolecularSequence | Vital Signs Profile) | Related measurements the observation is made from
component | S Σ C | 0..* | BackboneElement | Used when reporting systolic and diastolic blood pressure. Constraints: vs-3
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 | S Σ | 1..1 | CodeableConcept | Type of component observation (code / type) Binding: VitalSigns (extensible): This identifies the vital sign result type.
value[x] | S Σ C | 0..1 |  | Vital Sign Value recorded with UCUM Binding: VitalSignsUnits (required): Common UCUM units for recording Vital Signs.
valueQuantity |  |  | Quantity |
valueCodeableConcept |  |  | CodeableConcept |
valueString |  |  | string |
valueBoolean |  |  | boolean |
valueInteger |  |  | integer |
valueRange |  |  | Range |
valueRatio |  |  | Ratio |
valueSampledData |  |  | SampledData |
valueTime |  |  | time |
valueDateTime |  |  | dateTime |
valuePeriod |  |  | Period |
dataAbsentReason | S 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 | Status | Usage | ValueSet | Version | Source
Observation.language | Base | preferred | Common Languages | 📦4.0.1 | FHIR Std.
Observation.status | Base | required | ObservationStatus | 📍4.0.1 | FHIR Std.
Observation.category | Base | preferred | Observation Category Codes | 📦4.0.1 | FHIR Std.
Observation.category:VSCat | Base | preferred | Observation Category Codes | 📦4.0.1 | FHIR Std.
Observation.code | Base | extensible | Vital Signs | 📦4.0.1 | FHIR Std.
Observation.value[x]:valueQuantity.​comparator | Base | required | QuantityComparator | 📍4.0.1 | FHIR Std.
Observation.value[x]:valueQuantity.​code | Base | required | Metric Body Length Units | ⏿1.0.0 | tx.hl7.org.au
Observation.dataAbsentReason | Base | extensible | DataAbsentReason | 📦4.0.1 | FHIR Std.
Observation.interpretation | Base | extensible | Observation Interpretation Codes | 📦4.0.1 | FHIR Std.
Observation.bodySite | Base | preferred | Body Site | ⏿1.0.2 | tx.hl7.org.au
Observation.method | Base | example | Observation Methods | 📦4.0.1 | FHIR Std.
Observation.referenceRange.​type | Base | preferred | Observation Reference Range Meaning Codes | 📦4.0.1 | FHIR Std.
Observation.referenceRange.​appliesTo | Base | example | Observation Reference Range Applies To Codes | 📦4.0.1 | FHIR Std.
Observation.component.​code | Base | extensible | Vital Signs | 📦4.0.1 | FHIR Std.
Observation.component.​value[x] | Base | required | Vital Signs Units | 📍4.0.1 | FHIR Std.
Observation.component.​dataAbsentReason | Base | extensible | DataAbsentReason | 📦4.0.1 | FHIR Std.
Observation.component.​interpretation | Base | extensible | Observation Interpretation Codes | 📦4.0.1 | FHIR Std.

#### Constraints

Id | Grade | Path(s) | Description | Expression
au-core-obs-01 | error | Observation.effective[x] | Date shall be at least to day | `$this is DateTime implies $this.toString().length() >= 10`
au-core-obs-02 | error | Observation | At least value or data absent reason shall be present | `dataAbsentReason.exists() or value.exists()`
au-core-obs-04 | error | Observation.bodySite | If a coded body site is provided, at least one code shall be from SNOMED CT | `coding.exists() implies coding.where(system='http://snomed.info/sct').exists()`
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-3 | error | Observation.referenceRange | Must have at least a low or a high or text | `low.exists() or high.exists() or text.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()`
vs-1 | error | Observation.effective[x] | if Observation.effective[x] is dateTime and has a value then that value shall be precise to the day | `$this is dateTime implies $this.toString().length() >= 10`
vs-2 | error | Observation | If there is no component or hasMember element then either a value[x] or a data absent reason must be present. | `(component.empty() and hasMember.empty()) implies (dataAbsentReason.exists() or value.exists())`
vs-3 | error | Observation.component | If there is no a value a data absent reason must be present | `value.exists() or dataAbsentReason.exists()`

This structure is derived from AUCoreHeadCircumference

Summary

Must-Support: 3 elements

Key Elements View

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Observation | C | 0..* | AUCoreHeadCircumference | Head circumference Constraints: obs-6, obs-7, vs-2, au-core-obs-02
implicitRules | ?!Σ | 0..1 | uri | A set of rules under which this content was created
modifierExtension | ?! | 0..* | Extension | Extensions that cannot be ignored
status | ?!SO Σ | 1..1 | code | registered | preliminary | final | amended + Binding: ObservationStatus (required) Fixed Value: final
Obligations | Actor
SHALL:populate & SHALL:persist | SHC Host FHIR Server
SHALL:populate & SHALL:process | SHC App
Slices for category | S | 1..* | CodeableConcept | Classification of type of observation Slice: Unordered, Open by value:coding.code, value:coding.system Binding: ObservationCategoryCodes (preferred): Codes for high level observation categories.
category:VSCat | SO | 1..1 | CodeableConcept | Classification of type of observation Binding: ObservationCategoryCodes (preferred): Codes for high level observation categories.
Obligations | Actor
SHALL:persist | SHC Host FHIR Server
SHALL:populate | SHC App
coding | S Σ | 1..* | Coding | Code defined by a terminology system
system | S Σ | 1..1 | uri | Identity of the terminology system Fixed Value: http://terminology.hl7.org/CodeSystem/observation-category
code | S Σ | 1..1 | code | Symbol in syntax defined by the system Fixed Value: vital-signs
code | S Σ | 1..1 | CodeableConcept | Head Circumference Binding: VitalSigns (extensible): This identifies the vital sign result type.
Slices for coding | Σ | 2..* | Coding | Code defined by a terminology system Slice: Unordered, Open by value:code, value:system
coding:HeadCircumCode | SO Σ | 1..1 | Coding | Code defined by a terminology system
Obligations | Actor
SHALL:populate & SHALL:persist | SHC Host FHIR Server
SHALL:populate & SHALL:process | SHC App
system | Σ | 1..1 | uri | Identity of the terminology system Fixed Value: http://loinc.org
code | Σ | 1..1 | code | Symbol in syntax defined by the system Fixed Value: 9843-4
coding:snomedHeadCircumCode | SO Σ | 1..1 | Coding | SNOMED CT Head Circumference
Obligations | Actor
SHALL:persist | SHC Host FHIR Server
SHALL:populate | SHC App
system | Σ | 1..1 | uri | Identity of the terminology system Fixed Value: http://snomed.info/sct
code | Σ | 1..1 | code | Symbol in syntax defined by the system Fixed Value: 363812007
text | SO Σ | 0..1 | string | Plain text representation of the concept
Obligations | Actor
SHALL:populate | SHC App
subject | SO Σ | 1..1 | Reference(AU Core Patient) | Who and/or what the observation is about
Obligations | Actor
SHALL:populate & SHALL:persist | SHC Host FHIR Server
SHALL:populate | SHC App
encounter | S Σ | 0..1 | Reference(AU Core Encounter) | Healthcare event during which this observation is made
effective[x] | SO Σ C | 1..1 | dateTime | Date, and optionally time, the observation was performed Constraints: vs-1, au-core-obs-01
Obligations | Actor
SHALL:populate & SHALL:persist | SHC Host FHIR Server
SHALL:populate-if-known & SHALL:process | SHC App
performer | S Σ | 0..* | Reference(AU Core Practitioner | AU Core PractitionerRole | AU Core Organization | AU Core Patient | AU Core RelatedPerson) | Who is responsible for the observation
Slices for value[x] | S Σ C | 0..1 | Quantity | Vital Signs value are recorded using the Quantity data type. For supporting observations such as Cuff size could use other datatypes such as CodeableConcept. Slice: Unordered, Closed by type:$this
value[x]:valueQuantity | SO Σ C | 0..1 | Quantity | Head circumference
Obligations | Actor
SHALL:populate-if-known & SHALL:persist | SHC Host FHIR Server
SHALL:populate & SHALL:process | SHC App
value | SO Σ | 1..1 | decimal | Numerical value (with implicit precision)
Obligations | Actor
SHALL:populate-if-known & SHALL:persist | SHC Host FHIR Server
SHALL:populate & SHALL:process | SHC App
comparator | ?!Σ | 0..1 | code | < | <= | >= | > - how to understand the value Binding: QuantityComparator (required): How the Quantity should be understood and represented.
unit | SO Σ | 1..1 | string | Unit representation
Obligations | Actor
SHALL:populate-if-known & SHALL:process | SHC Host FHIR Server
SHALL:populate | SHC App
system | SO Σ C | 1..1 | uri | System that defines coded unit form Fixed Value: http://unitsofmeasure.org
Obligations | Actor
SHALL:populate-if-known & SHALL:persist | SHC Host FHIR Server
SHALL:populate & SHALL:process | SHC App
code | SO Σ | 1..1 | code | Coded responses from the common UCUM units for vital signs value set. Binding: Metric Body Length Units (required)
Obligations | Actor
SHALL:populate-if-known & SHALL:persist | SHC Host FHIR Server
SHALL:populate & SHALL:process | SHC App
dataAbsentReason | S C | 0..1 | CodeableConcept | Why the result is missing Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
component | S Σ C | 0..* | BackboneElement | Used when reporting systolic and diastolic blood pressure. Constraints: vs-3
modifierExtension | ?!Σ | 0..* | Extension | Extensions that cannot be ignored even if unrecognized
code | S Σ | 1..1 | CodeableConcept | Type of component observation (code / type) Binding: VitalSigns (extensible): This identifies the vital sign result type.
value[x] | S Σ C | 0..1 |  | Vital Sign Value recorded with UCUM Binding: VitalSignsUnits (required): Common UCUM units for recording Vital Signs.
valueQuantity |  |  | Quantity |
valueCodeableConcept |  |  | CodeableConcept |
valueString |  |  | string |
valueBoolean |  |  | boolean |
valueInteger |  |  | integer |
valueRange |  |  | Range |
valueRatio |  |  | Ratio |
valueSampledData |  |  | SampledData |
valueTime |  |  | time |
valueDateTime |  |  | dateTime |
valuePeriod |  |  | Period |
dataAbsentReason | S C | 0..1 | CodeableConcept | Why the component result is missing Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
Documentation for this format

#### Terminology Bindings

Path | Status | Usage | ValueSet | Version | Source
Observation.status | Base | required | ObservationStatus | 📍4.0.1 | FHIR Std.
Observation.category | Base | preferred | Observation Category Codes | 📦4.0.1 | FHIR Std.
Observation.category:VSCat | Base | preferred | Observation Category Codes | 📦4.0.1 | FHIR Std.
Observation.code | Base | extensible | Vital Signs | 📦4.0.1 | FHIR Std.
Observation.value[x]:valueQuantity.​comparator | Base | required | QuantityComparator | 📍4.0.1 | FHIR Std.
Observation.value[x]:valueQuantity.​code | Base | required | Metric Body Length Units | ⏿1.0.0 | tx.hl7.org.au
Observation.dataAbsentReason | Base | extensible | DataAbsentReason | 📦4.0.1 | FHIR Std.
Observation.component.​code | Base | extensible | Vital Signs | 📦4.0.1 | FHIR Std.
Observation.component.​value[x] | Base | required | Vital Signs Units | 📍4.0.1 | FHIR Std.
Observation.component.​dataAbsentReason | Base | extensible | DataAbsentReason | 📦4.0.1 | FHIR Std.

#### Constraints

Id | Grade | Path(s) | Description | Expression
au-core-obs-01 | error | Observation.effective[x] | Date shall be at least to day | `$this is DateTime implies $this.toString().length() >= 10`
au-core-obs-02 | error | Observation | At least value or data absent reason shall be present | `dataAbsentReason.exists() or value.exists()`
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()`
vs-1 | error | Observation.effective[x] | if Observation.effective[x] is dateTime and has a value then that value shall be precise to the day | `$this is dateTime implies $this.toString().length() >= 10`
vs-2 | error | Observation | If there is no component or hasMember element then either a value[x] or a data absent reason must be present. | `(component.empty() and hasMember.empty()) implies (dataAbsentReason.exists() or value.exists())`
vs-3 | error | Observation.component | If there is no a value a data absent reason must be present | `value.exists() or dataAbsentReason.exists()`

Differential View

This structure is derived from AUCoreHeadCircumference

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Observation |  |  | AUCoreHeadCircumference |
status | O | 1..1 | code | registered | preliminary | final | amended +
Obligations | Actor
SHALL:populate & SHALL:persist | SHC Host FHIR Server
SHALL:populate & SHALL:process | SHC App
Slices for category |  |  |  | Content/Rules for all slices
category:VSCat | O | 1..1 | CodeableConcept | Classification of type of observation
Obligations | Actor
SHALL:persist | SHC Host FHIR Server
SHALL:populate | SHC App
code |  |  |  |
Slices for coding |  |  |  | Content/Rules for all slices
coding:HeadCircumCode | SO | 1..1 | Coding | Code defined by a terminology system
Obligations | Actor
SHALL:populate & SHALL:persist | SHC Host FHIR Server
SHALL:populate & SHALL:process | SHC App
coding:snomedHeadCircumCode | SO | 1..1 | Coding | SNOMED CT Head Circumference
Obligations | Actor
SHALL:persist | SHC Host FHIR Server
SHALL:populate | SHC App
text | SO | 0..1 | string | Plain text representation of the concept
Obligations | Actor
SHALL:populate | SHC App
subject | O | 1..1 | Reference(AU Core Patient) | Who and/or what the observation is about
Obligations | Actor
SHALL:populate & SHALL:persist | SHC Host FHIR Server
SHALL:populate | SHC App
effective[x] | O | 1..1 | dateTime | Date, and optionally time, the observation was performed
Obligations | Actor
SHALL:populate & SHALL:persist | SHC Host FHIR Server
SHALL:populate-if-known & SHALL:process | SHC App
Slices for value[x] |  |  |  | Content/Rules for all slices
value[x]:valueQuantity | O | 0..1 | Quantity | Head circumference
Obligations | Actor
SHALL:populate-if-known & SHALL:persist | SHC Host FHIR Server
SHALL:populate & SHALL:process | SHC App
value | O | 1..1 | decimal | Numerical value (with implicit precision)
Obligations | Actor
SHALL:populate-if-known & SHALL:persist | SHC Host FHIR Server
SHALL:populate & SHALL:process | SHC App
unit | O | 1..1 | string | Unit representation
Obligations | Actor
SHALL:populate-if-known & SHALL:process | SHC Host FHIR Server
SHALL:populate | SHC App
system | O | 1..1 | uri | System that defines coded unit form
Obligations | Actor
SHALL:populate-if-known & SHALL:persist | SHC Host FHIR Server
SHALL:populate & SHALL:process | SHC App
code | O | 1..1 | code | Coded responses from the common UCUM units for vital signs value set.
Obligations | Actor
SHALL:populate-if-known & SHALL:persist | SHC Host FHIR Server
SHALL:populate & SHALL:process | SHC App
Documentation for this format

Snapshot View

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Observation | C | 0..* | AUCoreHeadCircumference | Head circumference Constraints: obs-6, obs-7, vs-2, au-core-obs-02
id | Σ | 0..1 | id | Logical id of this artifact
meta | Σ | 0..1 | Meta | Metadata about the resource
implicitRules | ?!Σ | 0..1 | uri | A set of rules under which this content was created
language |  | 0..1 | code | Language of the resource content Binding: CommonLanguages (preferred): A human language.
Additional Bindings | Purpose
AllLanguages | Max Binding
text |  | 0..1 | Narrative | Text summary of the resource, for human interpretation This profile does not constrain the narrative in regard to content, language, or traceability to data elements
contained |  | 0..* | Resource | Contained, inline Resources
extension |  | 0..* | Extension | Additional content defined by implementations
modifierExtension | ?! | 0..* | Extension | Extensions that cannot be ignored
identifier | Σ | 0..* | Identifier | Business Identifier for observation
basedOn | Σ | 0..* | Reference(CarePlan | DeviceRequest | ImmunizationRecommendation | MedicationRequest | NutritionOrder | ServiceRequest) | Fulfills plan, proposal or order
partOf | Σ | 0..* | Reference(MedicationAdministration | MedicationDispense | MedicationStatement | Procedure | Immunization | ImagingStudy) | Part of referenced event
status | ?!SO Σ | 1..1 | code | registered | preliminary | final | amended + Binding: ObservationStatus (required) Fixed Value: final
Obligations | Actor
SHALL:populate & SHALL:persist | SHC Host FHIR Server
SHALL:populate & SHALL:process | SHC App
Slices for category | S | 1..* | CodeableConcept | Classification of type of observation Slice: Unordered, Open by value:coding.code, value:coding.system Binding: ObservationCategoryCodes (preferred): Codes for high level observation categories.
category:VSCat | SO | 1..1 | CodeableConcept | Classification of type of observation Binding: ObservationCategoryCodes (preferred): Codes for high level observation categories.
Obligations | Actor
SHALL:persist | SHC Host FHIR Server
SHALL:populate | SHC App
id |  | 0..1 | string | Unique id for inter-element referencing
extension |  | 0..* | Extension | Additional content defined by implementations Slice: Unordered, Open by value:url
coding | S Σ | 1..* | Coding | Code defined by a terminology system
id |  | 0..1 | string | Unique id for inter-element referencing
extension |  | 0..* | Extension | Additional content defined by implementations Slice: Unordered, Open by value:url
system | S Σ | 1..1 | uri | Identity of the terminology system Fixed Value: http://terminology.hl7.org/CodeSystem/observation-category
version | Σ | 0..1 | string | Version of the system - if relevant
code | S Σ | 1..1 | code | Symbol in syntax defined by the system Fixed Value: vital-signs
display | Σ | 0..1 | string | Representation defined by the system
userSelected | Σ | 0..1 | boolean | If this coding was chosen directly by the user
text | Σ | 0..1 | string | Plain text representation of the concept
code | S Σ | 1..1 | CodeableConcept | Head Circumference Binding: VitalSigns (extensible): This identifies the vital sign result type.
id |  | 0..1 | string | Unique id for inter-element referencing
extension |  | 0..* | Extension | Additional content defined by implementations Slice: Unordered, Open by value:url
Slices for coding | Σ | 2..* | Coding | Code defined by a terminology system Slice: Unordered, Open by value:code, value:system
coding:HeadCircumCode | SO Σ | 1..1 | Coding | Code defined by a terminology system
Obligations | Actor
SHALL:populate & SHALL:persist | SHC Host FHIR Server
SHALL:populate & SHALL:process | SHC App
id |  | 0..1 | string | Unique id for inter-element referencing
extension |  | 0..* | Extension | Additional content defined by implementations Slice: Unordered, Open by value:url
system | Σ | 1..1 | uri | Identity of the terminology system Fixed Value: http://loinc.org
version | Σ | 0..1 | string | Version of the system - if relevant
code | Σ | 1..1 | code | Symbol in syntax defined by the system Fixed Value: 9843-4
display | Σ | 0..1 | string | Representation defined by the system
userSelected | Σ | 0..1 | boolean | If this coding was chosen directly by the user
coding:snomedHeadCircumCode | SO Σ | 1..1 | Coding | SNOMED CT Head Circumference
Obligations | Actor
SHALL:persist | SHC Host FHIR Server
SHALL:populate | SHC App
id |  | 0..1 | string | Unique id for inter-element referencing
extension |  | 0..* | Extension | Additional content defined by implementations Slice: Unordered, Open by value:url
system | Σ | 1..1 | uri | Identity of the terminology system Fixed Value: http://snomed.info/sct
version | Σ | 0..1 | string | Version of the system - if relevant
code | Σ | 1..1 | code | Symbol in syntax defined by the system Fixed Value: 363812007
display | Σ | 0..1 | string | Representation defined by the system
userSelected | Σ | 0..1 | boolean | If this coding was chosen directly by the user
text | SO Σ | 0..1 | string | Plain text representation of the concept
Obligations | Actor
SHALL:populate | SHC App
subject | SO Σ | 1..1 | Reference(AU Core Patient) | Who and/or what the observation is about
Obligations | Actor
SHALL:populate & SHALL:persist | SHC Host FHIR Server
SHALL:populate | SHC App
focus | Σ | 0..* | Reference(Resource) | What the observation is about, when it is not about the subject of record
encounter | S Σ | 0..1 | Reference(AU Core Encounter) | Healthcare event during which this observation is made
effective[x] | SO Σ C | 1..1 | dateTime | Date, and optionally time, the observation was performed Constraints: vs-1, au-core-obs-01
Obligations | Actor
SHALL:populate & SHALL:persist | SHC Host FHIR Server
SHALL:populate-if-known & SHALL:process | SHC App
issued | Σ | 0..1 | instant | Date/Time this version was made available
performer | S Σ | 0..* | Reference(AU Core Practitioner | AU Core PractitionerRole | AU Core Organization | AU Core Patient | AU Core RelatedPerson) | Who is responsible for the observation
Slices for value[x] | S Σ C | 0..1 | Quantity | Vital Signs value are recorded using the Quantity data type. For supporting observations such as Cuff size could use other datatypes such as CodeableConcept. Slice: Unordered, Closed by type:$this
value[x]:valueQuantity | SO Σ C | 0..1 | Quantity | Head circumference
Obligations | Actor
SHALL:populate-if-known & SHALL:persist | SHC Host FHIR Server
SHALL:populate & SHALL:process | SHC App
id |  | 0..1 | string | Unique id for inter-element referencing
extension |  | 0..* | Extension | Additional content defined by implementations Slice: Unordered, Open by value:url
value | SO Σ | 1..1 | decimal | Numerical value (with implicit precision)
Obligations | Actor
SHALL:populate-if-known & SHALL:persist | SHC Host FHIR Server
SHALL:populate & SHALL:process | SHC App
comparator | ?!Σ | 0..1 | code | < | <= | >= | > - how to understand the value Binding: QuantityComparator (required): How the Quantity should be understood and represented.
unit | SO Σ | 1..1 | string | Unit representation
Obligations | Actor
SHALL:populate-if-known & SHALL:process | SHC Host FHIR Server
SHALL:populate | SHC App
system | SO Σ C | 1..1 | uri | System that defines coded unit form Fixed Value: http://unitsofmeasure.org
Obligations | Actor
SHALL:populate-if-known & SHALL:persist | SHC Host FHIR Server
SHALL:populate & SHALL:process | SHC App
code | SO Σ | 1..1 | code | Coded responses from the common UCUM units for vital signs value set. Binding: Metric Body Length Units (required)
Obligations | Actor
SHALL:populate-if-known & SHALL:persist | SHC Host FHIR Server
SHALL:populate & SHALL:process | SHC App
dataAbsentReason | S C | 0..1 | CodeableConcept | Why the 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.
note |  | 0..* | Annotation | Comments about the observation
bodySite | C | 0..1 | CodeableConcept | Observed body part Binding: Body Site (preferred) Constraints: au-core-obs-04
method |  | 0..1 | CodeableConcept | How it was done Binding: ObservationMethods (example): Methods for simple observations.
specimen |  | 0..1 | Reference(Specimen) | Specimen used for this observation
device |  | 0..1 | Reference(Device | DeviceMetric) | (Measurement) Device
referenceRange | C | 0..* | BackboneElement | Provides guide for interpretation Constraints: obs-3
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
low | C | 0..1 | SimpleQuantity | Low Range, if relevant
high | C | 0..1 | SimpleQuantity | High Range, if relevant
type |  | 0..1 | CodeableConcept | Reference range qualifier Binding: ObservationReferenceRangeMeaningCodes (preferred): Code for the meaning of a reference range.
appliesTo |  | 0..* | CodeableConcept | Reference range population Binding: ObservationReferenceRangeAppliesToCodes (example): Codes identifying the population the reference range applies to.
age |  | 0..1 | Range | Applicable age range, if relevant
text |  | 0..1 | string | Text based reference range in an observation
hasMember | Σ | 0..* | Reference(QuestionnaireResponse | MolecularSequence | Vital Signs Profile) | Used when reporting vital signs panel components
derivedFrom | Σ | 0..* | Reference(DocumentReference | ImagingStudy | Media | QuestionnaireResponse | MolecularSequence | Vital Signs Profile) | Related measurements the observation is made from
component | S Σ C | 0..* | BackboneElement | Used when reporting systolic and diastolic blood pressure. Constraints: vs-3
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 | S Σ | 1..1 | CodeableConcept | Type of component observation (code / type) Binding: VitalSigns (extensible): This identifies the vital sign result type.
value[x] | S Σ C | 0..1 |  | Vital Sign Value recorded with UCUM Binding: VitalSignsUnits (required): Common UCUM units for recording Vital Signs.
valueQuantity |  |  | Quantity |
valueCodeableConcept |  |  | CodeableConcept |
valueString |  |  | string |
valueBoolean |  |  | boolean |
valueInteger |  |  | integer |
valueRange |  |  | Range |
valueRatio |  |  | Ratio |
valueSampledData |  |  | SampledData |
valueTime |  |  | time |
valueDateTime |  |  | dateTime |
valuePeriod |  |  | Period |
dataAbsentReason | S 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 | Status | Usage | ValueSet | Version | Source
Observation.language | Base | preferred | Common Languages | 📦4.0.1 | FHIR Std.
Observation.status | Base | required | ObservationStatus | 📍4.0.1 | FHIR Std.
Observation.category | Base | preferred | Observation Category Codes | 📦4.0.1 | FHIR Std.
Observation.category:VSCat | Base | preferred | Observation Category Codes | 📦4.0.1 | FHIR Std.
Observation.code | Base | extensible | Vital Signs | 📦4.0.1 | FHIR Std.
Observation.value[x]:valueQuantity.​comparator | Base | required | QuantityComparator | 📍4.0.1 | FHIR Std.
Observation.value[x]:valueQuantity.​code | Base | required | Metric Body Length Units | ⏿1.0.0 | tx.hl7.org.au
Observation.dataAbsentReason | Base | extensible | DataAbsentReason | 📦4.0.1 | FHIR Std.
Observation.interpretation | Base | extensible | Observation Interpretation Codes | 📦4.0.1 | FHIR Std.
Observation.bodySite | Base | preferred | Body Site | ⏿1.0.2 | tx.hl7.org.au
Observation.method | Base | example | Observation Methods | 📦4.0.1 | FHIR Std.
Observation.referenceRange.​type | Base | preferred | Observation Reference Range Meaning Codes | 📦4.0.1 | FHIR Std.
Observation.referenceRange.​appliesTo | Base | example | Observation Reference Range Applies To Codes | 📦4.0.1 | FHIR Std.
Observation.component.​code | Base | extensible | Vital Signs | 📦4.0.1 | FHIR Std.
Observation.component.​value[x] | Base | required | Vital Signs Units | 📍4.0.1 | FHIR Std.
Observation.component.​dataAbsentReason | Base | extensible | DataAbsentReason | 📦4.0.1 | FHIR Std.
Observation.component.​interpretation | Base | extensible | Observation Interpretation Codes | 📦4.0.1 | FHIR Std.

#### Constraints

Id | Grade | Path(s) | Description | Expression
au-core-obs-01 | error | Observation.effective[x] | Date shall be at least to day | `$this is DateTime implies $this.toString().length() >= 10`
au-core-obs-02 | error | Observation | At least value or data absent reason shall be present | `dataAbsentReason.exists() or value.exists()`
au-core-obs-04 | error | Observation.bodySite | If a coded body site is provided, at least one code shall be from SNOMED CT | `coding.exists() implies coding.where(system='http://snomed.info/sct').exists()`
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-3 | error | Observation.referenceRange | Must have at least a low or a high or text | `low.exists() or high.exists() or text.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()`
vs-1 | error | Observation.effective[x] | if Observation.effective[x] is dateTime and has a value then that value shall be precise to the day | `$this is dateTime implies $this.toString().length() >= 10`
vs-2 | error | Observation | If there is no component or hasMember element then either a value[x] or a data absent reason must be present. | `(component.empty() and hasMember.empty()) implies (dataAbsentReason.exists() or value.exists())`
vs-3 | error | Observation.component | If there is no a value a data absent reason must be present | `value.exists() or dataAbsentReason.exists()`

This structure is derived from AUCoreHeadCircumference

Summary

Must-Support: 3 elements

Other representations of profile: CSV, Excel, Schematron