| Observation | I | | Observation | Element idShort description Finnish PHR Bodyheight profile Alternate names Vital Signs, Measurement, Results, Tests Definition The FHIR Vitals Signs profile sets minimum expectations for the Observation Resource to record, search and fetch the vital signs associated with a patient.
Used for simple observations such as device measurements, laboratory atomic results, vital signs, height, weight, smoking status, comments, etc. Other resources are used to provide context for observations such as laboratory reports, etc.
Observation Constraints- dom-2: If the resource is contained in another resource, it SHALL NOT contain nested Resources
contained.contained.empty() - dom-4: If a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated
contained.meta.versionId.empty() and contained.meta.lastUpdated.empty() - dom-3: If the resource is contained in another resource, it SHALL be referred to from elsewhere in the resource or SHALL refer to the containing resource
contained.where((('#'+id in (%resource.descendants().reference | %resource.descendants().as(canonical) | %resource.descendants().as(uri) | %resource.descendants().as(url))) or descendants().where(reference = '#').exists() or descendants().where(as(canonical) = '#').exists() or descendants().where(as(canonical) = '#').exists()).not()).trace('unmatched', id).empty() - dom-6: A resource should have narrative for robust management
text.div.exists() - dom-5: If a resource is contained in another resource, it SHALL NOT have a security label
contained.meta.security.empty() - obs-7: 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.code = %resource.code.coding.code) and (coding.system = %resource.code.coding.system)).empty() - obs-6: dataAbsentReason SHALL only be present if Observation.value[x] is not present
dataAbsentReason.empty() or value.empty() - vs-2: 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 or value)
- rim: Entity. Role, or Act
- workflow: Event
- sct-concept: < 363787002 |Observable entity|
- v2: OBX
- rim: Observation[classCode=OBS, moodCode=EVN]
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| id | Σ | 0..1 | id | There are no (further) constraints on this element Element idShort description Logical id of this artifact Definition The logical id of the resource, as used in the URL for the resource. Once assigned, this value never changes.
The only time that a resource does not have an id is when it is being submitted to the server using a create operation.
id Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
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| meta | Σ | 1..1 | Meta | There are no (further) constraints on this element Element idShort description Metadata about the resource Definition The metadata about the resource. This is content that is maintained by the infrastructure. Changes to the content might not always be associated with version changes to the resource.
Meta Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
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| id | | 0..1 | | There are no (further) constraints on this element Element idShort description Unique id for inter-element referencing Definition Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
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| extension | I | 0..* | Extension | There are no (further) constraints on this element Element idObservation.meta.extension Additional content defined by implementations Alternate names extensions, user content Definition May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
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.
Extension Sliced: Unordered, Open, by url(Value) Extensions are always sliced by (at least) url Constraints- 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()
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| versionId | Σ | 0..1 | id | There are no (further) constraints on this element Element idObservation.meta.versionId Version specific identifier Definition The version specific identifier, as it appears in the version portion of the URL. This value changes when the resource is created, updated, or deleted.
The server assigns this value, and ignores what the client specifies, except in the case that the server is imposing version integrity on updates/deletes.
id Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
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| lastUpdated | Σ | 0..1 | instant | There are no (further) constraints on this element Element idObservation.meta.lastUpdated When the resource version last changed Definition When the resource last changed - e.g. when the version changed.
This value is always populated except when the resource is first being created. The server / resource manager sets this value; what a client provides is irrelevant. This is equivalent to the HTTP Last-Modified and SHOULD have the same value on a read interaction.
instant Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
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| source | Σ | 0..1 | uri | There are no (further) constraints on this element Element idShort description Identifies where the resource comes from Definition A uri that identifies the source system of the resource. This provides a minimal amount of Provenance information that can be used to track or differentiate the source of information in the resource. The source may identify another FHIR server, document, message, database, etc.
In the provenance resource, this corresponds to Provenance.entity.what[x]. The exact use of the source (and the implied Provenance.entity.role) is left to implementer discretion. Only one nominated source is allowed; for additional provenance details, a full Provenance resource should be used.
This element can be used to indicate where the current master source of a resource that has a canonical URL if the resource is no longer hosted at the canonical URL.
uri Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
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| profile | Σ | 1..* | canonical(StructureDefinition) | There are no (further) constraints on this element Element idShort description Profiles this resource claims to conform to Definition Comments It is up to the server and/or other infrastructure of policy to determine whether/how these claims are verified and/or updated over time. The list of profile URLs is a set.
canonical(StructureDefinition) Sliced: Unordered, Open, by $this(Value) Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
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| fiphrProfile | Σ | 1..1 | canonical(StructureDefinition)Fixed Value | Element idObservation.meta.profile:fiphrProfile Profiles this resource claims to conform to Definition Comments It is up to the server and/or other infrastructure of policy to determine whether/how these claims are verified and/or updated over time. The list of profile URLs is a set.
canonical(StructureDefinition) Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
http://phr.kanta.fi/StructureDefinition/fiphr-sd-bodyheight |
| security | Σ | 0..* | CodingBinding | There are no (further) constraints on this element Element idObservation.meta.security Security Labels applied to this resource Definition Security labels applied to this resource. These tags connect specific resources to the overall security policy and infrastructure.
The security labels can be updated without changing the stated version of the resource. The list of security labels is a set. Uniqueness is based the system/code, and version and display are ignored.
Coding Binding Security Labels from the Healthcare Privacy and Security Classification System.
- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: CE/CNE/CWE subset one of the sets of component 1-3 or 4-6
- rim: CV
- orim: fhir:Coding rdfs:subClassOf dt:CDCoding
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| tag | Σ | 0..* | Coding | There are no (further) constraints on this element Element idShort description Tags applied to this resource Definition Tags applied to this resource. Tags are intended to be used to identify and relate resources to process and workflow, and applications are not required to consider the tags when interpreting the meaning of a resource.
The tags can be updated without changing the stated version of the resource. The list of tags is a set. Uniqueness is based the system/code, and version and display are ignored.
Coding Binding Codes that represent various types of tags, commonly workflow-related; e.g. "Needs review by Dr. Jones".
- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: CE/CNE/CWE subset one of the sets of component 1-3 or 4-6
- rim: CV
- orim: fhir:Coding rdfs:subClassOf dt:CDCoding
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| implicitRules | Σ ?! | 0..1 | uri | There are no (further) constraints on this element Element idObservation.implicitRules A set of rules under which this content was created Definition A reference to a set of rules that were followed when the resource was constructed, and which must be understood when processing the content. Often, this is a reference to an implementation guide that defines the special rules along with other profiles etc.
Asserting this rule set restricts the content to be only understood by a limited set of trading partners. This inherently limits the usefulness of the data in the long term. However, the existing health eco-system is highly fractured, and not yet ready to define, collect, and exchange data in a generally computable sense. Wherever possible, implementers and/or specification writers should avoid using this element. Often, when used, the URL is a reference to an implementation guide that defines these special rules as part of it's narrative along with other profiles, value sets, etc.
uri Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
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| language | | 1..1 | codeBinding | There are no (further) constraints on this element Element idShort description Language of the resource content Definition The base language in which the resource is written.
Language is provided to support indexing and accessibility (typically, services such as text to speech use the language tag). The html language tag in the narrative applies to the narrative. The language tag on the resource may be used to specify the language of other presentations generated from the data in the resource. Not all the content has to be in the base language. The Resource.language should not be assumed to apply to the narrative automatically. If a language is specified, it should it also be specified on the div element in the html (see rules in HTML5 for information about the relationship between xml:lang and the html lang attribute).
code Binding Finnish PHR: A code of human language.
- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
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| text | | 1..1 | Narrative | There are no (further) constraints on this element Element idShort description Text summary of the resource, for human interpretation Alternate names narrative, html, xhtml, display Definition A human-readable narrative that contains a summary of the resource and can be used to represent the content of the resource to a human. The narrative need not encode all the structured data, but is required to contain sufficient detail to make it "clinically safe" for a human to just read the narrative. Resource definitions may define what content should be represented in the narrative to ensure clinical safety.
Contained resources do not have narrative. Resources that are not contained SHOULD have a narrative. In some cases, a resource may only have text with little or no additional discrete data (as long as all minOccurs=1 elements are satisfied). This may be necessary for data from legacy systems where information is captured as a "text blob" or where text is additionally entered raw or narrated and encoded information is added later.
Narrative Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- rim: N/A
- rim: Act.text?
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| contained | | 0..* | Resource | There are no (further) constraints on this element Element idShort description Contained, inline Resources Alternate names inline resources, anonymous resources, contained resources Definition These resources do not have an independent existence apart from the resource that contains them - they cannot be identified independently, and nor can they have their own independent transaction scope.
This should never be done when the content can be identified properly, as once identification is lost, it is extremely difficult (and context dependent) to restore it again. Contained resources may have profiles and tags In their meta elements, but SHALL NOT have security labels.
Resource Mappings- rim: Entity. Role, or Act
- rim: N/A
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| extension | I | 0..* | Extension | There are no (further) constraints on this element Element idShort description Additional content defined by implementations Alternate names extensions, user content Definition May be used to represent additional information that is not part of the basic definition of the resource. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
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.
Extension Sliced: Unordered, Open, by url(Value) Extensions are always sliced by (at least) url Constraints- 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()
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| creatingApplication | I | 0..* | Extension(Complex) | There are no (further) constraints on this element Element idObservation.extension:creatingApplication Application identification Alternate names extensions, user content Definition Application identification information. SHALL have same values that has been registered for application in PHR application catalog.
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.
Extension(Complex) Extension URL http://phr.kanta.fi/StructureDefinition/fiphr-ext-creatingapplication Constraints- 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()
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| modifierExtension | ?! I | 0..* | Extension | There are no (further) constraints on this element Element idObservation.modifierExtension Extensions that cannot be ignored Alternate names extensions, user content Definition May be used to represent additional information that is not part of the basic definition of the resource and that modifies the understanding of the element that contains it and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.
Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).
Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.
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.
Extension Sliced: Unordered, Open, by url(Value) Extensions are always sliced by (at least) url Constraints- 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()
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| identifier | Σ | 1..* | Identifier | There are no (further) constraints on this element Element idShort description Business Identifier for observation Definition A unique identifier assigned to this observation.
Finnish PHR: At least one of the identifiers SHALL be globally unique (e.g. an uuid as the value and 'urn:ietf:rfc:3986' as the system).
Allows observations to be distinguished and referenced.
Identifier Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: CX / EI (occasionally, more often EI maps to a resource id or a URL)
- rim: II - The Identifier class is a little looser than the v3 type II because it allows URIs as well as registered OIDs or GUIDs. Also maps to Role[classCode=IDENT]
- servd: Identifier
- workflow: Event.identifier
- w5: FiveWs.identifier
- v2: OBX.21 For OBX segments from systems without OBX-21 support a combination of ORC/OBR and OBX must be negotiated between trading partners to uniquely identify the OBX segment. Depending on how V2 has been implemented each of these may be an option: 1) OBR-3 + OBX-3 + OBX-4 or 2) OBR-3 + OBR-4 + OBX-3 + OBX-4 or 2) some other way to uniquely ID the OBR/ORC + OBX-3 + OBX-4.
- rim: id
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| id | | 0..1 | | There are no (further) constraints on this element Element idObservation.identifier.id Unique id for inter-element referencing Definition Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
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| extension | I | 0..* | Extension | There are no (further) constraints on this element Element idObservation.identifier.extension Additional content defined by implementations Alternate names extensions, user content Definition May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
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.
Extension Sliced: Unordered, Open, by url(Value) Extensions are always sliced by (at least) url Constraints- 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()
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| use | Σ ?! | 0..1 | codeBinding | There are no (further) constraints on this element Element idObservation.identifier.use usual | official | temp | secondary | old (If known) Definition The purpose of this identifier.
Finnish PHR: The code 'official' SHALL be only used if the given identifier value is truly globally unique (e.g. an uuid as the value and 'urn:ietf:rfc:3986' as the system).
Allows the appropriate identifier for a particular context of use to be selected from among a set of identifiers.
This is labeled as "Is Modifier" because applications should not mistake a temporary id for a permanent one. Applications can assume that an identifier is permanent unless it explicitly says that it is temporary.
code Binding Identifies the purpose for this identifier, if known .
- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: N/A
- rim: Role.code or implied by context
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| type | S Σ | 0..1 | CodeableConceptBinding | There are no (further) constraints on this element Element idObservation.identifier.type Description of identifier Definition A coded type for the identifier that can be used to determine which identifier to use for a specific purpose.
Allows users to make use of identifiers when the identifier system is not known.
This element deals only with general categories of identifiers. It SHOULD not be used for codes that correspond 1..1 with the Identifier.system. Some identifiers may fall into multiple categories due to common usage. Where the system is known, a type is unnecessary because the type is always part of the system definition. However systems often need to handle identifiers where the system is not known. There is not a 1:1 relationship between type and system, since many different systems have the same type.
CodeableConcept Binding A coded type for an identifier that can be used to determine which identifier to use for a specific purpose.
- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: CE/CNE/CWE
- rim: CD
- orim: fhir:CodeableConcept rdfs:subClassOf dt:CD
- v2: CX.5
- rim: Role.code or implied by context
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| system | Σ | 1..1 | uri | There are no (further) constraints on this element Element idObservation.identifier.system The namespace for the identifier value Definition Establishes the namespace for the value - that is, a URL that describes a set values that are unique.
There are many sets of identifiers. To perform matching of two identifiers, we need to know what set we're dealing with. The system identifies a particular set of unique identifiers.
see http://en.wikipedia.org/wiki/Uniform_resource_identifier
uri Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
Generalhttp://www.acme.com/identifiers/patient
Mappings- rim: n/a
- v2: CX.4 / EI-2-4
- rim: II.root or Role.id.root
- servd: ./IdentifierType
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| value | Σ | 1..1 | string | There are no (further) constraints on this element Element idObservation.identifier.value The value that is unique Definition The portion of the identifier typically relevant to the user and which is unique within the context of the system.
Finnish PHR: At least one of the identifiers SHALL be truly globally unique (e.g. an uuid as the value and 'urn:ietf:rfc:3986' as the system).
If the value is a full URI, then the system SHALL be urn:ietf:rfc:3986. The value's primary purpose is computational mapping. As a result, it may be normalized for comparison purposes (e.g. removing non-significant whitespace, dashes, etc.) A value formatted for human display can be conveyed using the Rendered Value extension.
string Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
Mappings- rim: n/a
- v2: CX.1 / EI.1
- rim: II.extension or II.root if system indicates OID or GUID (Or Role.id.extension or root)
- servd: ./Value
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| period | Σ I | 0..1 | Period | There are no (further) constraints on this element Element idObservation.identifier.period Time period when id is/was valid for use Definition Time period during which identifier is/was valid for use.
A Period specifies a range of time; the context of use will specify whether the entire range applies (e.g. "the patient was an inpatient of the hospital for this time range") or one value from the range applies (e.g. "give to the patient between these two times").
Period is not used for a duration (a measure of elapsed time). See Duration.
Period Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count()) - per-1: If present, start SHALL have a lower value than end
start.hasValue().not() or end.hasValue().not() or (start <= end)
- rim: n/a
- v2: DR
- rim: IVL<TS>[lowClosed="true" and highClosed="true"] or URG<TS>[lowClosed="true" and highClosed="true"]
- v2: CX.7 + CX.8
- rim: Role.effectiveTime or implied by context
- servd: ./StartDate and ./EndDate
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| assigner | Σ I | 0..0 | Reference(Organization) | There are no (further) constraints on this element Element idObservation.identifier.assigner Organization that issued id (may be just text) Definition Organization that issued/manages the identifier.
The Identifier.assigner may omit the .reference element and only contain a .display element reflecting the name or other textual information about the assigning organization.
Reference(Organization) Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count()) - ref-1: SHALL have a contained resource if a local reference is provided
reference.startsWith('#').not() or (reference.substring(1).trace('url') in %resource.contained.id.trace('ids'))
- rim: n/a
- rim: The target of a resource reference is a RIM entry point (Act, Role, or Entity)
- v2: CX.4 / (CX.4,CX.9,CX.10)
- rim: II.assigningAuthorityName but note that this is an improper use by the definition of the field. Also Role.scoper
- servd: ./IdentifierIssuingAuthority
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| basedOn | Σ I | 0..0 | Reference(CarePlan | DeviceRequest | ImmunizationRecommendation | MedicationRequest | NutritionOrder | ServiceRequest) | There are no (further) constraints on this element Element idShort description Fulfills plan, proposal or order Alternate names Fulfills Definition A plan, proposal or order that is fulfilled in whole or in part by this event. For example, a MedicationRequest may require a patient to have laboratory test performed before it is dispensed.
Allows tracing of authorization for the event and tracking whether proposals/recommendations were acted upon.
References SHALL be a reference to an actual FHIR resource, and SHALL be resolveable (allowing for access control, temporary unavailability, etc.). Resolution can be either by retrieval from the URL, or, where applicable by resource type, by treating an absolute reference as a canonical URL and looking it up in a local registry/repository.
Reference(CarePlan | DeviceRequest | ImmunizationRecommendation | MedicationRequest | NutritionOrder | ServiceRequest) Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count()) - ref-1: SHALL have a contained resource if a local reference is provided
reference.startsWith('#').not() or (reference.substring(1).trace('url') in %resource.contained.id.trace('ids'))
- rim: n/a
- rim: The target of a resource reference is a RIM entry point (Act, Role, or Entity)
- workflow: Event.basedOn
- v2: ORC
- rim: .inboundRelationship[typeCode=COMP].source[moodCode=EVN]
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| partOf | Σ I | 0..0 | Reference(MedicationAdministration | MedicationDispense | MedicationStatement | Procedure | Immunization | ImagingStudy) | There are no (further) constraints on this element Element idShort description Part of referenced event Alternate names Container Definition A larger event of which this particular Observation is a component or step. For example, an observation as part of a procedure.
To link an Observation to an Encounter use encounter. See the Notes below for guidance on referencing another Observation.
Reference(MedicationAdministration | MedicationDispense | MedicationStatement | Procedure | Immunization | ImagingStudy) Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count()) - ref-1: SHALL have a contained resource if a local reference is provided
reference.startsWith('#').not() or (reference.substring(1).trace('url') in %resource.contained.id.trace('ids'))
- rim: n/a
- rim: The target of a resource reference is a RIM entry point (Act, Role, or Entity)
- workflow: Event.partOf
- v2: Varies by domain
- rim: .outboundRelationship[typeCode=FLFS].target
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| status | S Σ ?! | 1..1 | codeBindingFixed Value | There are no (further) constraints on this element Element idShort description Finnish PHR: Status final Definition Finnish PHR: The status of the result value.
Finnish PHR: Need to track the status of individual results. Erronous observation may not be stored in FinnishPHR.
Finnish PHR: Only status 'final' shall be used in FinnishPHR.
code Binding Codes providing the status of an observation.
- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- workflow: Event.status
- w5: FiveWs.status
- sct-concept: < 445584004 |Report by finality status|
- v2: OBX-11
- rim: status Amended & Final are differentiated by whether it is the subject of a ControlAct event with a type of "revise"
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| category | S | 1..* | CodeableConceptBinding | There are no (further) constraints on this element Element idShort description Classification of type of observation. Definition Classification of type of observation.
All resources all vital signs observations.
FinnishPHR: Vital-sign code SHALL be used. Additional codes MAY be used. (defined by the value set). More fine-grained filtering can be performed using the Observation.code.
CodeableConcept Sliced: Unordered, Open, by coding.code(Value), coding.system(Value) Binding Classification of type of observation.
- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: CE/CNE/CWE
- rim: CD
- orim: fhir:CodeableConcept rdfs:subClassOf dt:CD
- w5: FiveWs.class
- rim: .outboundRelationship[typeCode="COMP].target[classCode="LIST", moodCode="EVN"].code
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| VSCat | S | 1..1 | CodeableConceptBinding | There are no (further) constraints on this element Element idObservation.category:VSCat Classification of type of observation Definition A code that classifies the general type of observation being made.
Used for filtering what observations are retrieved and displayed.
In addition to the required category valueset, this element allows various categorization schemes based on the owner’s definition of the category and effectively multiple categories can be used at once. The level of granularity is defined by the category concepts in the value set.
CodeableConcept Binding Codes for high level observation categories.
- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: CE/CNE/CWE
- rim: CD
- orim: fhir:CodeableConcept rdfs:subClassOf dt:CD
- w5: FiveWs.class
- rim: .outboundRelationship[typeCode="COMP].target[classCode="LIST", moodCode="EVN"].code
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| id | | 0..1 | | There are no (further) constraints on this element Element idObservation.category:VSCat.id Unique id for inter-element referencing Definition Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
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| extension | I | 0..* | Extension | There are no (further) constraints on this element Element idObservation.category:VSCat.extension Additional content defined by implementations Alternate names extensions, user content Definition May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
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.
Extension Sliced: Unordered, Open, by url(Value) Extensions are always sliced by (at least) url Constraints- 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()
|
| coding | S Σ | 1..* | Coding | There are no (further) constraints on this element Element idObservation.category:VSCat.coding Code defined by a terminology system Definition A reference to a code defined by a terminology system.
Allows for alternative encodings within a code system, and translations to other code systems.
Codes may be defined very casually in enumerations, or code lists, up to very formal definitions such as SNOMED CT - see the HL7 v3 Core Principles for more information. Ordering of codings is undefined and SHALL NOT be used to infer meaning. Generally, at most only one of the coding values will be labeled as UserSelected = true.
Coding Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: CE/CNE/CWE subset one of the sets of component 1-3 or 4-6
- rim: CV
- orim: fhir:Coding rdfs:subClassOf dt:CDCoding
- v2: C*E.1-8, C*E.10-22
- rim: union(., ./translation)
- orim: fhir:CodeableConcept.coding rdfs:subPropertyOf dt:CD.coding
|
| id | | 0..1 | | There are no (further) constraints on this element Element idObservation.category:VSCat.coding.id Unique id for inter-element referencing Definition Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
|
| extension | I | 0..* | Extension | There are no (further) constraints on this element Element idObservation.category:VSCat.coding.extension Additional content defined by implementations Alternate names extensions, user content Definition May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
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.
Extension Sliced: Unordered, Open, by url(Value) Extensions are always sliced by (at least) url Constraints- 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()
|
| system | S Σ | 1..1 | uriFixed Value | There are no (further) constraints on this element Element idObservation.category:VSCat.coding.system Identity of the terminology system Definition The identification of the code system that defines the meaning of the symbol in the code.
Need to be unambiguous about the source of the definition of the symbol.
The URI may be an OID (urn:oid:...) or a UUID (urn:uuid:...). OIDs and UUIDs SHALL be references to the HL7 OID registry. Otherwise, the URI should come from HL7's list of FHIR defined special URIs or it should reference to some definition that establishes the system clearly and unambiguously.
uri Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
http://terminology.hl7.org/CodeSystem/observation-category - rim: n/a
- v2: C*E.3
- rim: ./codeSystem
- orim: fhir:Coding.system rdfs:subPropertyOf dt:CDCoding.codeSystem
|
| version | Σ | 0..1 | string | There are no (further) constraints on this element Element idObservation.category:VSCat.coding.version Version of the system - if relevant Definition The version of the code system which was used when choosing this code. Note that a well-maintained code system does not need the version reported, because the meaning of codes is consistent across versions. However this cannot consistently be assured, and when the meaning is not guaranteed to be consistent, the version SHOULD be exchanged.
Where the terminology does not clearly define what string should be used to identify code system versions, the recommendation is to use the date (expressed in FHIR date format) on which that version was officially published as the version date.
string Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: C*E.7
- rim: ./codeSystemVersion
- orim: fhir:Coding.version rdfs:subPropertyOf dt:CDCoding.codeSystemVersion
|
| code | S Σ | 1..1 | codeFixed Value | There are no (further) constraints on this element Element idObservation.category:VSCat.coding.code Symbol in syntax defined by the system Definition A symbol in syntax defined by the system. The symbol may be a predefined code or an expression in a syntax defined by the coding system (e.g. post-coordination).
Need to refer to a particular code in the system.
Note that FHIR strings SHALL NOT exceed 1MB in size
code Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: C*E.1
- rim: ./code
- orim: fhir:Coding.code rdfs:subPropertyOf dt:CDCoding.code
|
| display | Σ | 0..1 | string | There are no (further) constraints on this element Element idObservation.category:VSCat.coding.display Representation defined by the system Definition A representation of the meaning of the code in the system, following the rules of the system.
Need to be able to carry a human-readable meaning of the code for readers that do not know the system.
Note that FHIR strings SHALL NOT exceed 1MB in size
string Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: C*E.2 - but note this is not well followed
- rim: CV.displayName
- orim: fhir:Coding.display rdfs:subPropertyOf dt:CDCoding.displayName
|
| userSelected | Σ | 0..1 | boolean | There are no (further) constraints on this element Element idObservation.category:VSCat.coding.userSelected If this coding was chosen directly by the user Definition Indicates that this coding was chosen by a user directly - e.g. off a pick list of available items (codes or displays).
This has been identified as a clinical safety criterium - that this exact system/code pair was chosen explicitly, rather than inferred by the system based on some rules or language processing.
Amongst a set of alternatives, a directly chosen code is the most appropriate starting point for new translations. There is some ambiguity about what exactly 'directly chosen' implies, and trading partner agreement may be needed to clarify the use of this element and its consequences more completely.
boolean Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: Sometimes implied by being first
- rim: CD.codingRationale
- orim: fhir:Coding.userSelected fhir:mapsTo dt:CDCoding.codingRationale. fhir:Coding.userSelected fhir:hasMap fhir:Coding.userSelected.map. fhir:Coding.userSelected.map a fhir:Map; fhir:target dt:CDCoding.codingRationale. fhir:Coding.userSelected\#true a [ fhir:source "true"; fhir:target dt:CDCoding.codingRationale\#O ]
|
| text | Σ | 0..1 | string | There are no (further) constraints on this element Element idObservation.category:VSCat.text Plain text representation of the concept Definition A human language representation of the concept as seen/selected/uttered by the user who entered the data and/or which represents the intended meaning of the user.
The codes from the terminologies do not always capture the correct meaning with all the nuances of the human using them, or sometimes there is no appropriate code at all. In these cases, the text is used to capture the full meaning of the source.
Very often the text is the same as a displayName of one of the codings.
string Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: C*E.9. But note many systems use C*E.2 for this
- rim: ./originalText[mediaType/code="text/plain"]/data
- orim: fhir:CodeableConcept.text rdfs:subPropertyOf dt:CD.originalText
|
| code | S Σ | 1..1 | CodeableConceptBinding | There are no (further) constraints on this element Element idShort description Coded Responses from C-CDA Vital Sign Results Alternate names Name Definition Coded Responses from C-CDA Vital Sign Results.
- SHALL contain exactly one [1..1] code, where the @code SHOULD be selected from ValueSet HITSP Vital Sign Result Type 2.16.840.1.113883.3.88.12.80.62 DYNAMIC (CONF:7301).
Describes type of observation.
CodeableConcept Binding This identifies the vital sign result type.
- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: CE/CNE/CWE
- rim: CD
- orim: fhir:CodeableConcept rdfs:subClassOf dt:CD
- workflow: Event.code
- w5: FiveWs.what[x]
- sct-concept: < 363787002 |Observable entity| OR < 386053000 |Evaluation procedure|
- v2: OBX-3
- rim: code
- sct-attr: 116680003 |Is a|
|
| id | | 0..1 | | There are no (further) constraints on this element Element idShort description Unique id for inter-element referencing Definition Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
|
| extension | I | 0..* | Extension | There are no (further) constraints on this element Element idObservation.code.extension Additional content defined by implementations Alternate names extensions, user content Definition May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
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.
Extension Sliced: Unordered, Open, by url(Value) Extensions are always sliced by (at least) url Constraints- 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()
|
| coding | Σ | 1..* | Coding | Element idShort description Code defined by a terminology system Definition A reference to a code defined by a terminology system.
Allows for alternative encodings within a code system, and translations to other code systems.
Codes may be defined very casually in enumerations, or code lists, up to very formal definitions such as SNOMED CT - see the HL7 v3 Core Principles for more information. Ordering of codings is undefined and SHALL NOT be used to infer meaning. Generally, at most only one of the coding values will be labeled as UserSelected = true.
Coding Sliced: Unordered, Open, by code(Value) Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: CE/CNE/CWE subset one of the sets of component 1-3 or 4-6
- rim: CV
- orim: fhir:Coding rdfs:subClassOf dt:CDCoding
- v2: C*E.1-8, C*E.10-22
- rim: union(., ./translation)
- orim: fhir:CodeableConcept.coding rdfs:subPropertyOf dt:CD.coding
|
| fiphrCode | Σ | 1..1 | Coding | There are no (further) constraints on this element Element idObservation.code.coding:fiphrCode Code defined by a terminology system Definition A reference to a code defined by a terminology system.
Allows for alternative encodings within a code system, and translations to other code systems.
Codes may be defined very casually in enumerations, or code lists, up to very formal definitions such as SNOMED CT - see the HL7 v3 Core Principles for more information. Ordering of codings is undefined and SHALL NOT be used to infer meaning. Generally, at most only one of the coding values will be labeled as UserSelected = true.
Coding Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: CE/CNE/CWE subset one of the sets of component 1-3 or 4-6
- rim: CV
- orim: fhir:Coding rdfs:subClassOf dt:CDCoding
- v2: C*E.1-8, C*E.10-22
- rim: union(., ./translation)
- orim: fhir:CodeableConcept.coding rdfs:subPropertyOf dt:CD.coding
|
| id | | 0..1 | | There are no (further) constraints on this element Element idObservation.code.coding:fiphrCode.id Unique id for inter-element referencing Definition Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
|
| extension | I | 0..* | Extension | There are no (further) constraints on this element Element idObservation.code.coding:fiphrCode.extension Additional content defined by implementations Alternate names extensions, user content Definition May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
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.
Extension Sliced: Unordered, Open, by url(Value) Extensions are always sliced by (at least) url Constraints- 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()
|
| system | Σ | 1..1 | uriFixed Value | Element idObservation.code.coding:fiphrCode.system Identity of the terminology system Definition The identification of the code system that defines the meaning of the symbol in the code.
Need to be unambiguous about the source of the definition of the symbol.
The URI may be an OID (urn:oid:...) or a UUID (urn:uuid:...). OIDs and UUIDs SHALL be references to the HL7 OID registry. Otherwise, the URI should come from HL7's list of FHIR defined special URIs or it should reference to some definition that establishes the system clearly and unambiguously.
uri Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: C*E.3
- rim: ./codeSystem
- orim: fhir:Coding.system rdfs:subPropertyOf dt:CDCoding.codeSystem
|
| version | Σ | 0..1 | string | There are no (further) constraints on this element Element idObservation.code.coding:fiphrCode.version Version of the system - if relevant Definition The version of the code system which was used when choosing this code. Note that a well-maintained code system does not need the version reported, because the meaning of codes is consistent across versions. However this cannot consistently be assured, and when the meaning is not guaranteed to be consistent, the version SHOULD be exchanged.
Where the terminology does not clearly define what string should be used to identify code system versions, the recommendation is to use the date (expressed in FHIR date format) on which that version was officially published as the version date.
string Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: C*E.7
- rim: ./codeSystemVersion
- orim: fhir:Coding.version rdfs:subPropertyOf dt:CDCoding.codeSystemVersion
|
| code | Σ | 1..1 | codeFixed Value | Element idObservation.code.coding:fiphrCode.code Symbol in syntax defined by the system Definition A symbol in syntax defined by the system. The symbol may be a predefined code or an expression in a syntax defined by the coding system (e.g. post-coordination).
Need to refer to a particular code in the system.
Note that FHIR strings SHALL NOT exceed 1MB in size
code Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: C*E.1
- rim: ./code
- orim: fhir:Coding.code rdfs:subPropertyOf dt:CDCoding.code
|
| display | Σ | 1..1 | string | There are no (further) constraints on this element Element idObservation.code.coding:fiphrCode.display Representation defined by the system Definition A representation of the meaning of the code in the system, following the rules of the system.
Need to be able to carry a human-readable meaning of the code for readers that do not know the system.
Note that FHIR strings SHALL NOT exceed 1MB in size
string Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: C*E.2 - but note this is not well followed
- rim: CV.displayName
- orim: fhir:Coding.display rdfs:subPropertyOf dt:CDCoding.displayName
|
| userSelected | Σ | 0..1 | boolean | There are no (further) constraints on this element Element idObservation.code.coding:fiphrCode.userSelected If this coding was chosen directly by the user Definition Indicates that this coding was chosen by a user directly - e.g. off a pick list of available items (codes or displays).
This has been identified as a clinical safety criterium - that this exact system/code pair was chosen explicitly, rather than inferred by the system based on some rules or language processing.
Amongst a set of alternatives, a directly chosen code is the most appropriate starting point for new translations. There is some ambiguity about what exactly 'directly chosen' implies, and trading partner agreement may be needed to clarify the use of this element and its consequences more completely.
boolean Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: Sometimes implied by being first
- rim: CD.codingRationale
- orim: fhir:Coding.userSelected fhir:mapsTo dt:CDCoding.codingRationale. fhir:Coding.userSelected fhir:hasMap fhir:Coding.userSelected.map. fhir:Coding.userSelected.map a fhir:Map; fhir:target dt:CDCoding.codingRationale. fhir:Coding.userSelected\#true a [ fhir:source "true"; fhir:target dt:CDCoding.codingRationale\#O ]
|
| text | Σ | 0..1 | string | There are no (further) constraints on this element Element idShort description Plain text representation of the concept Definition A human language representation of the concept as seen/selected/uttered by the user who entered the data and/or which represents the intended meaning of the user.
The codes from the terminologies do not always capture the correct meaning with all the nuances of the human using them, or sometimes there is no appropriate code at all. In these cases, the text is used to capture the full meaning of the source.
Very often the text is the same as a displayName of one of the codings.
string Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: C*E.9. But note many systems use C*E.2 for this
- rim: ./originalText[mediaType/code="text/plain"]/data
- orim: fhir:CodeableConcept.text rdfs:subPropertyOf dt:CD.originalText
|
| subject | S Σ I | 1..1 | Reference(Finnish PHR Patient profile) | There are no (further) constraints on this element Element idShort description Who and/or what the observation is about Definition Finnish PHR: The patient described by the observation and into whose record the observation is placed.
Finnish PHR: Observations have always known the Patient
Finnish PHR: Who this observation is about. Usually the same person as the application user, but if the user is storing observations on behalf of someone else, the subject is the person whose measurements or other observations are entered.
Reference(Finnish PHR Patient profile) Allowed aggregation: referenced Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count()) - ref-1: SHALL have a contained resource if a local reference is provided
reference.startsWith('#').not() or (reference.substring(1).trace('url') in %resource.contained.id.trace('ids'))
- rim: n/a
- rim: The target of a resource reference is a RIM entry point (Act, Role, or Entity)
- workflow: Event.subject
- w5: FiveWs.subject[x]
- v2: PID-3
- rim: participation[typeCode=RTGT]
- w5: FiveWs.subject
|
| id | | 0..1 | | There are no (further) constraints on this element Element idShort description Unique id for inter-element referencing Definition Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
|
| extension | I | 0..* | Extension | There are no (further) constraints on this element Element idObservation.subject.extension Additional content defined by implementations Alternate names extensions, user content Definition May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
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.
Extension Sliced: Unordered, Open, by url(Value) Extensions are always sliced by (at least) url Constraints- 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()
|
| reference | Σ I | 1..1 | string | There are no (further) constraints on this element Element idObservation.subject.reference Literal reference, Relative, internal or absolute URL Definition A reference to a location at which the other resource is found. The reference may be a relative reference, in which case it is relative to the service base URL, or an absolute URL that resolves to the location where the resource is found. The reference may be version specific or not. If the reference is not to a FHIR RESTful server, then it should be assumed to be version specific. Internal fragment references (start with '#') refer to contained resources.
Using absolute URLs provides a stable scalable approach suitable for a cloud/web context, while using relative/logical references provides a flexible approach suitable for use when trading across closed eco-system boundaries. Absolute URLs do not need to point to a FHIR RESTful server, though this is the preferred approach. If the URL conforms to the structure "/[type]/[id]" then it should be assumed that the reference is to a FHIR RESTful server.
string Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
|
| type | Σ | 0..1 | uriBinding | There are no (further) constraints on this element Element idShort description Type the reference refers to (e.g. "Patient") Definition The expected type of the target of the reference. If both Reference.type and Reference.reference are populated and Reference.reference is a FHIR URL, both SHALL be consistent.
The type is the Canonical URL of Resource Definition that is the type this reference refers to. References are URLs that are relative to http://hl7.org/fhir/StructureDefinition/ e.g. "Patient" is a reference to http://hl7.org/fhir/StructureDefinition/Patient. Absolute URLs are only allowed for logical models (and can only be used in references in logical models, not resources).
This element is used to indicate the type of the target of the reference. This may be used which ever of the other elements are populated (or not). In some cases, the type of the target may be determined by inspection of the reference (e.g. a RESTful URL) or by resolving the target of the reference; if both the type and a reference is provided, the reference SHALL resolve to a resource of the same type as that specified.
uri Binding Aa resource (or, for logical models, the URI of the logical model).
- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
|
| identifier | Σ | 0..1 | Identifier | There are no (further) constraints on this element Element idObservation.subject.identifier Logical reference, when literal reference is not known Definition An identifier for the target resource. This is used when there is no way to reference the other resource directly, either because the entity it represents is not available through a FHIR server, or because there is no way for the author of the resource to convert a known identifier to an actual location. There is no requirement that a Reference.identifier point to something that is actually exposed as a FHIR instance, but it SHALL point to a business concept that would be expected to be exposed as a FHIR instance, and that instance would need to be of a FHIR resource type allowed by the reference.
When an identifier is provided in place of a reference, any system processing the reference will only be able to resolve the identifier to a reference if it understands the business context in which the identifier is used. Sometimes this is global (e.g. a national identifier) but often it is not. For this reason, none of the useful mechanisms described for working with references (e.g. chaining, includes) are possible, nor should servers be expected to be able resolve the reference. Servers may accept an identifier based reference untouched, resolve it, and/or reject it - see CapabilityStatement.rest.resource.referencePolicy.
When both an identifier and a literal reference are provided, the literal reference is preferred. Applications processing the resource are allowed - but not required - to check that the identifier matches the literal reference
Applications converting a logical reference to a literal reference may choose to leave the logical reference present, or remove it.
Reference is intended to point to a structure that can potentially be expressed as a FHIR resource, though there is no need for it to exist as an actual FHIR resource instance - except in as much as an application wishes to actual find the target of the reference. The content referred to be the identifier must meet the logical constraints implied by any limitations on what resource types are permitted for the reference. For example, it would not be legitimate to send the identifier for a drug prescription if the type were Reference(Observation|DiagnosticReport). One of the use-cases for Reference.identifier is the situation where no FHIR representation exists (where the type is Reference (Any).
Identifier Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: CX / EI (occasionally, more often EI maps to a resource id or a URL)
- rim: II - The Identifier class is a little looser than the v3 type II because it allows URIs as well as registered OIDs or GUIDs. Also maps to Role[classCode=IDENT]
- servd: Identifier
- rim: .identifier
|
| id | | 0..1 | | There are no (further) constraints on this element Element idObservation.subject.identifier.id Unique id for inter-element referencing Definition Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
|
| extension | I | 0..* | Extension | There are no (further) constraints on this element Element idObservation.subject.identifier.extension Additional content defined by implementations Alternate names extensions, user content Definition May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
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.
Extension Sliced: Unordered, Open, by url(Value) Extensions are always sliced by (at least) url Constraints- 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()
|
| use | Σ ?! | 0..1 | codeBinding | There are no (further) constraints on this element Element idObservation.subject.identifier.use usual | official | temp | secondary | old (If known) Definition The purpose of this identifier.
Allows the appropriate identifier for a particular context of use to be selected from among a set of identifiers.
Applications can assume that an identifier is permanent unless it explicitly says that it is temporary.
code Binding Identifies the purpose for this identifier, if known .
- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: N/A
- rim: Role.code or implied by context
|
| type | Σ | 0..1 | CodeableConceptBinding | There are no (further) constraints on this element Element idObservation.subject.identifier.type Description of identifier Definition A coded type for the identifier that can be used to determine which identifier to use for a specific purpose.
Allows users to make use of identifiers when the identifier system is not known.
This element deals only with general categories of identifiers. It SHOULD not be used for codes that correspond 1..1 with the Identifier.system. Some identifiers may fall into multiple categories due to common usage. Where the system is known, a type is unnecessary because the type is always part of the system definition. However systems often need to handle identifiers where the system is not known. There is not a 1:1 relationship between type and system, since many different systems have the same type.
CodeableConcept Binding A coded type for an identifier that can be used to determine which identifier to use for a specific purpose.
- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: CE/CNE/CWE
- rim: CD
- orim: fhir:CodeableConcept rdfs:subClassOf dt:CD
- v2: CX.5
- rim: Role.code or implied by context
|
| system | Σ | 0..1 | uri | There are no (further) constraints on this element Element idObservation.subject.identifier.system The namespace for the identifier value Definition Establishes the namespace for the value - that is, a URL that describes a set values that are unique.
There are many sets of identifiers. To perform matching of two identifiers, we need to know what set we're dealing with. The system identifies a particular set of unique identifiers.
Identifier.system is always case sensitive.
uri Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
Generalhttp://www.acme.com/identifiers/patient
Mappings- rim: n/a
- v2: CX.4 / EI-2-4
- rim: II.root or Role.id.root
- servd: ./IdentifierType
|
| value | Σ | 0..1 | string | There are no (further) constraints on this element Element idObservation.subject.identifier.value The value that is unique Definition The portion of the identifier typically relevant to the user and which is unique within the context of the system.
If the value is a full URI, then the system SHALL be urn:ietf:rfc:3986. The value's primary purpose is computational mapping. As a result, it may be normalized for comparison purposes (e.g. removing non-significant whitespace, dashes, etc.) A value formatted for human display can be conveyed using the Rendered Value extension. Identifier.value is to be treated as case sensitive unless knowledge of the Identifier.system allows the processer to be confident that non-case-sensitive processing is safe.
string Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
Mappings- rim: n/a
- v2: CX.1 / EI.1
- rim: II.extension or II.root if system indicates OID or GUID (Or Role.id.extension or root)
- servd: ./Value
|
| period | Σ I | 0..1 | Period | There are no (further) constraints on this element Element idObservation.subject.identifier.period Time period when id is/was valid for use Definition Time period during which identifier is/was valid for use.
A Period specifies a range of time; the context of use will specify whether the entire range applies (e.g. "the patient was an inpatient of the hospital for this time range") or one value from the range applies (e.g. "give to the patient between these two times").
Period is not used for a duration (a measure of elapsed time). See Duration.
Period Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count()) - per-1: If present, start SHALL have a lower value than end
start.hasValue().not() or end.hasValue().not() or (start <= end)
- rim: n/a
- v2: DR
- rim: IVL<TS>[lowClosed="true" and highClosed="true"] or URG<TS>[lowClosed="true" and highClosed="true"]
- v2: CX.7 + CX.8
- rim: Role.effectiveTime or implied by context
- servd: ./StartDate and ./EndDate
|
| assigner | Σ I | 0..0 | Reference(Organization) | There are no (further) constraints on this element Element idObservation.subject.identifier.assigner Organization that issued id (may be just text) Definition Organization that issued/manages the identifier.
The Identifier.assigner may omit the .reference element and only contain a .display element reflecting the name or other textual information about the assigning organization.
Reference(Organization) Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count()) - ref-1: SHALL have a contained resource if a local reference is provided
reference.startsWith('#').not() or (reference.substring(1).trace('url') in %resource.contained.id.trace('ids'))
- rim: n/a
- rim: The target of a resource reference is a RIM entry point (Act, Role, or Entity)
- v2: CX.4 / (CX.4,CX.9,CX.10)
- rim: II.assigningAuthorityName but note that this is an improper use by the definition of the field. Also Role.scoper
- servd: ./IdentifierIssuingAuthority
|
| display | Σ | 0..1 | string | There are no (further) constraints on this element Element idObservation.subject.display Text alternative for the resource Definition Plain text narrative that identifies the resource in addition to the resource reference.
This is generally not the same as the Resource.text of the referenced resource. The purpose is to identify what's being referenced, not to fully describe it.
string Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
|
| focus | Σ I | 0..0 | Reference(Resource) | There are no (further) constraints on this element Element idShort description What the observation is about, when it is not about the subject of record Definition The actual focus of an observation when it is not the patient of record representing something or someone associated with the patient such as a spouse, parent, fetus, or donor. For example, fetus observations in a mother's record. The focus of an observation could also be an existing condition, an intervention, the subject's diet, another observation of the subject, or a body structure such as tumor or implanted device. An example use case would be using the Observation resource to capture whether the mother is trained to change her child's tracheostomy tube. In this example, the child is the patient of record and the mother is the focus.
Typically, an observation is made about the subject - a patient, or group of patients, location, or device - and the distinction between the subject and what is directly measured for an observation is specified in the observation code itself ( e.g., "Blood Glucose") and does not need to be represented separately using this element. Use specimen if a reference to a specimen is required. If a code is required instead of a resource use either bodysite for bodysites or the standard extension focusCode.
Reference(Resource) Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count()) - ref-1: SHALL have a contained resource if a local reference is provided
reference.startsWith('#').not() or (reference.substring(1).trace('url') in %resource.contained.id.trace('ids'))
- rim: n/a
- rim: The target of a resource reference is a RIM entry point (Act, Role, or Entity)
- w5: FiveWs.subject[x]
- v2: OBX-3
- rim: participation[typeCode=SBJ]
- w5: FiveWs.subject
|
| encounter | Σ I | 0..0 | Reference(Encounter) | There are no (further) constraints on this element Element idShort description Healthcare event during which this observation is made Alternate names Context Definition The healthcare event (e.g. a patient and healthcare provider interaction) during which this observation is made.
For some observations it may be important to know the link between an observation and a particular encounter.
This will typically be the encounter the event occurred within, but some events may be initiated prior to or after the official completion of an encounter but still be tied to the context of the encounter (e.g. pre-admission laboratory tests).
Reference(Encounter) Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count()) - ref-1: SHALL have a contained resource if a local reference is provided
reference.startsWith('#').not() or (reference.substring(1).trace('url') in %resource.contained.id.trace('ids'))
- rim: n/a
- rim: The target of a resource reference is a RIM entry point (Act, Role, or Entity)
- workflow: Event.context
- w5: FiveWs.context
- v2: PV1
- rim: inboundRelationship[typeCode=COMP].source[classCode=ENC, moodCode=EVN]
|
| effective[x] | S Σ I | 1..1 | | There are no (further) constraints on this element Element idShort description Often just a dateTime for Vital Signs Alternate names Occurrence Definition Often just a dateTime for Vital Signs.
Knowing when an observation was deemed true is important to its relevance as well as determining trends.
At least a date should be present unless this observation is a historical report. For recording imprecise or "fuzzy" times (For example, a blood glucose measurement taken "after breakfast") use the Timing datatype which allow the measurement to be tied to regular life events.
- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count()) - vs-1: if Observation.effective[x] is dateTime and has a value then that value shall be precise to the day
($this as dateTime).toString().length() >= 8
- rim: n/a
- workflow: Event.occurrence[x]
- w5: FiveWs.done[x]
- v2: OBX-14, and/or OBX-19 after v2.4 (depends on who observation made)
- rim: effectiveTime
|
| effectiveDateTime | | | dateTime | There are no (further) constraints on this element Data type dateTime |
| issued | Σ | 1..1 | instant | There are no (further) constraints on this element Element idShort description Finnish PHR: The date and time this observation is stored Definition Finnish PHR: The date and time this observation is stored
Updated when the result is updated.
instant Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- w5: FiveWs.recorded
- v2: OBR.22 (or MSH.7), or perhaps OBX-19 (depends on who observation made)
- rim: participation[typeCode=AUT].time
|
| performer | Σ I | 1..1 | Reference(Finnish PHR Patient profile) | There are no (further) constraints on this element Element idShort description Finnish PHR: Application user who is responsible for the observation Definition FinnishPHR: Application user who was responsible for asserting the observed value as "true".
May give a degree of confidence in the observation and also indicates where follow-up questions should be directed.
References SHALL be a reference to an actual FHIR resource, and SHALL be resolveable.
Reference(Finnish PHR Patient profile) Allowed aggregation: referenced Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count()) - ref-1: SHALL have a contained resource if a local reference is provided
reference.startsWith('#').not() or (reference.substring(1).trace('url') in %resource.contained.id.trace('ids'))
- rim: n/a
- rim: The target of a resource reference is a RIM entry point (Act, Role, or Entity)
- workflow: Event.performer.actor
- w5: FiveWs.actor
- v2: OBX.15 / (Practitioner) OBX-16, PRT-5:PRT-4='RO' / (Device) OBX-18 , PRT-10:PRT-4='EQUIP' / (Organization) OBX-23, PRT-8:PRT-4='PO'
- rim: participation[typeCode=PRF]
|
| id | | 0..1 | | There are no (further) constraints on this element Element idShort description Unique id for inter-element referencing Definition Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
|
| extension | I | 0..* | Extension | There are no (further) constraints on this element Element idObservation.performer.extension Additional content defined by implementations Alternate names extensions, user content Definition May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
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.
Extension Sliced: Unordered, Open, by url(Value) Extensions are always sliced by (at least) url Constraints- 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()
|
| reference | Σ I | 1..1 | string | There are no (further) constraints on this element Element idObservation.performer.reference Literal reference, Relative, internal or absolute URL Definition A reference to a location at which the other resource is found. The reference may be a relative reference, in which case it is relative to the service base URL, or an absolute URL that resolves to the location where the resource is found. The reference may be version specific or not. If the reference is not to a FHIR RESTful server, then it should be assumed to be version specific. Internal fragment references (start with '#') refer to contained resources.
Using absolute URLs provides a stable scalable approach suitable for a cloud/web context, while using relative/logical references provides a flexible approach suitable for use when trading across closed eco-system boundaries. Absolute URLs do not need to point to a FHIR RESTful server, though this is the preferred approach. If the URL conforms to the structure "/[type]/[id]" then it should be assumed that the reference is to a FHIR RESTful server.
string Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
|
| type | Σ | 0..1 | uriBinding | There are no (further) constraints on this element Element idObservation.performer.type Type the reference refers to (e.g. "Patient") Definition The expected type of the target of the reference. If both Reference.type and Reference.reference are populated and Reference.reference is a FHIR URL, both SHALL be consistent.
The type is the Canonical URL of Resource Definition that is the type this reference refers to. References are URLs that are relative to http://hl7.org/fhir/StructureDefinition/ e.g. "Patient" is a reference to http://hl7.org/fhir/StructureDefinition/Patient. Absolute URLs are only allowed for logical models (and can only be used in references in logical models, not resources).
This element is used to indicate the type of the target of the reference. This may be used which ever of the other elements are populated (or not). In some cases, the type of the target may be determined by inspection of the reference (e.g. a RESTful URL) or by resolving the target of the reference; if both the type and a reference is provided, the reference SHALL resolve to a resource of the same type as that specified.
uri Binding Aa resource (or, for logical models, the URI of the logical model).
- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
|
| identifier | Σ | 0..1 | Identifier | There are no (further) constraints on this element Element idObservation.performer.identifier Logical reference, when literal reference is not known Definition An identifier for the target resource. This is used when there is no way to reference the other resource directly, either because the entity it represents is not available through a FHIR server, or because there is no way for the author of the resource to convert a known identifier to an actual location. There is no requirement that a Reference.identifier point to something that is actually exposed as a FHIR instance, but it SHALL point to a business concept that would be expected to be exposed as a FHIR instance, and that instance would need to be of a FHIR resource type allowed by the reference.
When an identifier is provided in place of a reference, any system processing the reference will only be able to resolve the identifier to a reference if it understands the business context in which the identifier is used. Sometimes this is global (e.g. a national identifier) but often it is not. For this reason, none of the useful mechanisms described for working with references (e.g. chaining, includes) are possible, nor should servers be expected to be able resolve the reference. Servers may accept an identifier based reference untouched, resolve it, and/or reject it - see CapabilityStatement.rest.resource.referencePolicy.
When both an identifier and a literal reference are provided, the literal reference is preferred. Applications processing the resource are allowed - but not required - to check that the identifier matches the literal reference
Applications converting a logical reference to a literal reference may choose to leave the logical reference present, or remove it.
Reference is intended to point to a structure that can potentially be expressed as a FHIR resource, though there is no need for it to exist as an actual FHIR resource instance - except in as much as an application wishes to actual find the target of the reference. The content referred to be the identifier must meet the logical constraints implied by any limitations on what resource types are permitted for the reference. For example, it would not be legitimate to send the identifier for a drug prescription if the type were Reference(Observation|DiagnosticReport). One of the use-cases for Reference.identifier is the situation where no FHIR representation exists (where the type is Reference (Any).
Identifier Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: CX / EI (occasionally, more often EI maps to a resource id or a URL)
- rim: II - The Identifier class is a little looser than the v3 type II because it allows URIs as well as registered OIDs or GUIDs. Also maps to Role[classCode=IDENT]
- servd: Identifier
- rim: .identifier
|
| id | | 0..1 | | There are no (further) constraints on this element Element idObservation.performer.identifier.id Unique id for inter-element referencing Definition Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
|
| extension | I | 0..* | Extension | There are no (further) constraints on this element Element idObservation.performer.identifier.extension Additional content defined by implementations Alternate names extensions, user content Definition May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
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.
Extension Sliced: Unordered, Open, by url(Value) Extensions are always sliced by (at least) url Constraints- 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()
|
| use | Σ ?! | 0..1 | codeBinding | There are no (further) constraints on this element Element idObservation.performer.identifier.use usual | official | temp | secondary | old (If known) Definition The purpose of this identifier.
Allows the appropriate identifier for a particular context of use to be selected from among a set of identifiers.
Applications can assume that an identifier is permanent unless it explicitly says that it is temporary.
code Binding Identifies the purpose for this identifier, if known .
- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: N/A
- rim: Role.code or implied by context
|
| type | Σ | 0..1 | CodeableConceptBinding | There are no (further) constraints on this element Element idObservation.performer.identifier.type Description of identifier Definition A coded type for the identifier that can be used to determine which identifier to use for a specific purpose.
Allows users to make use of identifiers when the identifier system is not known.
This element deals only with general categories of identifiers. It SHOULD not be used for codes that correspond 1..1 with the Identifier.system. Some identifiers may fall into multiple categories due to common usage. Where the system is known, a type is unnecessary because the type is always part of the system definition. However systems often need to handle identifiers where the system is not known. There is not a 1:1 relationship between type and system, since many different systems have the same type.
CodeableConcept Binding A coded type for an identifier that can be used to determine which identifier to use for a specific purpose.
- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: CE/CNE/CWE
- rim: CD
- orim: fhir:CodeableConcept rdfs:subClassOf dt:CD
- v2: CX.5
- rim: Role.code or implied by context
|
| system | Σ | 0..1 | uri | There are no (further) constraints on this element Element idObservation.performer.identifier.system The namespace for the identifier value Definition Establishes the namespace for the value - that is, a URL that describes a set values that are unique.
There are many sets of identifiers. To perform matching of two identifiers, we need to know what set we're dealing with. The system identifies a particular set of unique identifiers.
Identifier.system is always case sensitive.
uri Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
Generalhttp://www.acme.com/identifiers/patient
Mappings- rim: n/a
- v2: CX.4 / EI-2-4
- rim: II.root or Role.id.root
- servd: ./IdentifierType
|
| value | Σ | 0..1 | string | There are no (further) constraints on this element Element idObservation.performer.identifier.value The value that is unique Definition The portion of the identifier typically relevant to the user and which is unique within the context of the system.
If the value is a full URI, then the system SHALL be urn:ietf:rfc:3986. The value's primary purpose is computational mapping. As a result, it may be normalized for comparison purposes (e.g. removing non-significant whitespace, dashes, etc.) A value formatted for human display can be conveyed using the Rendered Value extension. Identifier.value is to be treated as case sensitive unless knowledge of the Identifier.system allows the processer to be confident that non-case-sensitive processing is safe.
string Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
Mappings- rim: n/a
- v2: CX.1 / EI.1
- rim: II.extension or II.root if system indicates OID or GUID (Or Role.id.extension or root)
- servd: ./Value
|
| period | Σ I | 0..1 | Period | There are no (further) constraints on this element Element idObservation.performer.identifier.period Time period when id is/was valid for use Definition Time period during which identifier is/was valid for use.
A Period specifies a range of time; the context of use will specify whether the entire range applies (e.g. "the patient was an inpatient of the hospital for this time range") or one value from the range applies (e.g. "give to the patient between these two times").
Period is not used for a duration (a measure of elapsed time). See Duration.
Period Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count()) - per-1: If present, start SHALL have a lower value than end
start.hasValue().not() or end.hasValue().not() or (start <= end)
- rim: n/a
- v2: DR
- rim: IVL<TS>[lowClosed="true" and highClosed="true"] or URG<TS>[lowClosed="true" and highClosed="true"]
- v2: CX.7 + CX.8
- rim: Role.effectiveTime or implied by context
- servd: ./StartDate and ./EndDate
|
| assigner | Σ I | 0..0 | Reference(Organization) | There are no (further) constraints on this element Element idObservation.performer.identifier.assigner Organization that issued id (may be just text) Definition Organization that issued/manages the identifier.
The Identifier.assigner may omit the .reference element and only contain a .display element reflecting the name or other textual information about the assigning organization.
Reference(Organization) Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count()) - ref-1: SHALL have a contained resource if a local reference is provided
reference.startsWith('#').not() or (reference.substring(1).trace('url') in %resource.contained.id.trace('ids'))
- rim: n/a
- rim: The target of a resource reference is a RIM entry point (Act, Role, or Entity)
- v2: CX.4 / (CX.4,CX.9,CX.10)
- rim: II.assigningAuthorityName but note that this is an improper use by the definition of the field. Also Role.scoper
- servd: ./IdentifierIssuingAuthority
|
| display | Σ | 0..1 | string | There are no (further) constraints on this element Element idObservation.performer.display Text alternative for the resource Definition Plain text narrative that identifies the resource in addition to the resource reference.
This is generally not the same as the Resource.text of the referenced resource. The purpose is to identify what's being referenced, not to fully describe it.
string Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
|
| value[x] | S Σ I | 1..1 | | There are no (further) constraints on this element Element idShort description Vital Signs value are recorded using the Quantity data type. For supporting observations such as Cuff size could use other datatypes such as CodeableConcept. Definition Vital Signs value are recorded using the Quantity data type. For supporting observations such as Cuff size could use other datatypes such as CodeableConcept.
- SHALL contain exactly one [1..1] value with @xsi:type="PQ" (CONF:7305).
Normally, an observation will have either a single value or a set of related observations. A few observations (e.g. Apgar score) may have both a value and related observations (for an Apgar score, the observations from which the measure is derived). If a value is present, the datatype for this element should be determined by Observation.code. This element has a variable name depending on the type as follows: valueQuantity, valueCodeableConcept, valueString, valueBoolean, valueRange, valueRatio, valueSampledData, valueAttachment, valueTime, valueDateTime, or valuePeriod. (The name format is "'value' + the type name" with a capital on the first letter of the type).
If the data element is usually coded or if the type associated with the Observation.value defines a coded value, use CodeableConcept instead of string datatype even if the value is uncoded text. A value set is bound to the ValueCodeableConcept element. For further discussion and examples see the notes section below.
- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- sct-concept: < 441742003 |Evaluation finding|
- v2: OBX.2, OBX.5, OBX.6
- rim: value
- sct-attr: 363714003 |Interprets|
|
| valueQuantity | | | Quantity | Data type Quantity |
| id | | 0..1 | | There are no (further) constraints on this element Element idShort description Unique id for inter-element referencing Definition Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
|
| extension | I | 0..* | Extension | There are no (further) constraints on this element Element idObservation.value[x].extension Additional content defined by implementations Alternate names extensions, user content Definition May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
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.
Extension Sliced: Unordered, Open, by url(Value) Extensions are always sliced by (at least) url Constraints- 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()
|
| value | Σ | 1..1 | decimal | There are no (further) constraints on this element Element idObservation.value[x].value Numerical value (with implicit precision) Definition The value of the measured amount. The value includes an implicit precision in the presentation of the value.
Precision is handled implicitly in almost all cases of measurement.
The implicit precision in the value should always be honored. Monetary values have their own rules for handling precision (refer to standard accounting text books).
decimal Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: SN.2 / CQ - N/A
- rim: PQ.value, CO.value, MO.value, IVL.high or IVL.low depending on the value
|
| comparator | Σ ?! | 0..1 | codeBinding | There are no (further) constraints on this element Element idObservation.value[x].comparator < | <= | >= | > - how to understand the value Definition How the value should be understood and represented - whether the actual value is greater or less than the stated value due to measurement issues; e.g. if the comparator is "<" , then the real value is < stated value.
Need a framework for handling measures where the value is <5ug/L or >400mg/L due to the limitations of measuring methodology.
Note that FHIR strings SHALL NOT exceed 1MB in size
If there is no comparator, then there is no modification of the value
code Binding How the Quantity should be understood and represented.
- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: SN.1 / CQ.1
- rim: IVL properties
|
| unit | Σ | 1..1 | stringFixed Value | Element idObservation.value[x].unit Unit representation Definition A human-readable form of the unit.
There are many representations for units of measure and in many contexts, particular representations are fixed and required. I.e. mcg for micrograms.
Note that FHIR strings SHALL NOT exceed 1MB in size
string Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: (see OBX.6 etc.) / CQ.2
- rim: PQ.unit
|
| system | Σ I | 1..1 | uriFixed Value | Element idObservation.value[x].system System that defines coded unit form Definition The identification of the system that provides the coded form of the unit.
Need to know the system that defines the coded form of the unit.
see http://en.wikipedia.org/wiki/Uniform_resource_identifier
uri Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
http://unitsofmeasure.org - rim: n/a
- v2: (see OBX.6 etc.) / CQ.2
- rim: CO.codeSystem, PQ.translation.codeSystem
|
| code | Σ | 1..1 | codeFixed Value | Element idObservation.value[x].code Coded form of the unit Definition A computer processable form of the unit in some unit representation system.
Need a computable form of the unit that is fixed across all forms. UCUM provides this for quantities, but SNOMED CT provides many units of interest.
The preferred system is UCUM, but SNOMED CT can also be used (for customary units) or ISO 4217 for currency. The context of use may additionally require a code from a particular system.
code Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: (see OBX.6 etc.) / CQ.2
- rim: PQ.code, MO.currency, PQ.translation.code
|
| dataAbsentReason | S I | 0..1 | CodeableConceptBinding | Element idObservation.dataAbsentReason Why the result is missing Definition FinnishPHR: NB! This element is not used in Finnish PHR.
For many results it is necessary to handle exceptional values in measurements.
Null or exceptional values can be represented two ways in FHIR Observations. One way is to simply include them in the value set and represent the exceptions in the value. For example, measurement values for a serology test could be "detected", "not detected", "inconclusive", or "specimen unsatisfactory".
The alternate way is to use the value element for actual observations and use the explicit dataAbsentReason element to record exceptional values. For example, the dataAbsentReason code "error" could be used when the measurement was not completed. Note that an observation may only be reported if there are values to report. For example differential cell counts values may be reported only when > 0. Because of these options, use-case agreements are required to interpret general observations for null or exceptional values.
CodeableConcept Binding Codes specifying why the result (Observation.value[x]) is missing.
- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: CE/CNE/CWE
- rim: CD
- orim: fhir:CodeableConcept rdfs:subClassOf dt:CD
- v2: N/A
- rim: value.nullFlavor
|
| id | | 0..0 | | There are no (further) constraints on this element Element idObservation.dataAbsentReason.id xml:id (or equivalent in JSON) Definition Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
|
| extension | I | 0..* | Extension | There are no (further) constraints on this element Element idObservation.dataAbsentReason.extension Additional content defined by implementations Alternate names extensions, user content Definition May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
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.
Extension Sliced: Unordered, Open, by url(Value) Extensions are always sliced by (at least) url Constraints- 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()
|
| coding | Σ | 0..0 | Coding | There are no (further) constraints on this element Element idObservation.dataAbsentReason.coding Code defined by a terminology system Definition A reference to a code defined by a terminology system.
Allows for alternative encodings within a code system, and translations to other code systems.
Codes may be defined very casually in enumerations, or code lists, up to very formal definitions such as SNOMED CT - see the HL7 v3 Core Principles for more information. Ordering of codings is undefined and SHALL NOT be used to infer meaning. Generally, at most only one of the coding values will be labeled as UserSelected = true.
Coding Sliced: Unordered, Open, by system(Value) Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: CE/CNE/CWE subset one of the sets of component 1-3 or 4-6
- rim: CV
- orim: fhir:Coding rdfs:subClassOf dt:CDCoding
- v2: C*E.1-8, C*E.10-22
- rim: union(., ./translation)
- orim: fhir:CodeableConcept.coding rdfs:subPropertyOf dt:CD.coding
|
| text | Σ | 0..0 | string | There are no (further) constraints on this element Element idObservation.dataAbsentReason.text Plain text representation of the concept Definition A human language representation of the concept as seen/selected/uttered by the user who entered the data and/or which represents the intended meaning of the user.
The codes from the terminologies do not always capture the correct meaning with all the nuances of the human using them, or sometimes there is no appropriate code at all. In these cases, the text is used to capture the full meaning of the source.
Very often the text is the same as a displayName of one of the codings.
string Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: C*E.9. But note many systems use C*E.2 for this
- rim: ./originalText[mediaType/code="text/plain"]/data
- orim: fhir:CodeableConcept.text rdfs:subPropertyOf dt:CD.originalText
|
| interpretation | | 0..1 | CodeableConceptBinding | There are no (further) constraints on this element Element idObservation.interpretation High, low, normal, etc. Alternate names Abnormal Flag Definition Finnish PHR: The assessment made based on the result of the observation. Intended as a simple compact code placed adjacent to the result value. Otherwise known as abnormal flag.
For some results, particularly numeric results, an interpretation is necessary to fully understand the significance of a result.
Not all terminology uses fit this general pattern. In some cases, models should not use CodeableConcept and use Coding directly and provide their own structure for managing text, codings, translations and the relationship between elements and pre- and post-coordination.
CodeableConcept Binding Finnish PHR: Codes identifying interpretations of observations.
- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: CE/CNE/CWE
- rim: CD
- orim: fhir:CodeableConcept rdfs:subClassOf dt:CD
- sct-concept: < 260245000 |Findings values|
- v2: OBX-8
- rim: interpretationCode
- sct-attr: 363713009 |Has interpretation|
|
| id | | 0..1 | | There are no (further) constraints on this element Element idObservation.interpretation.id Unique id for inter-element referencing Definition Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
|
| extension | I | 0..* | Extension | There are no (further) constraints on this element Element idObservation.interpretation.extension Additional content defined by implementations Alternate names extensions, user content Definition May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
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.
Extension Sliced: Unordered, Open, by url(Value) Extensions are always sliced by (at least) url Constraints- 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()
|
| coding | Σ | 1..* | Coding | There are no (further) constraints on this element Element idObservation.interpretation.coding Code defined by a terminology system Definition A reference to a code defined by a terminology system.
Allows for alternative encodings within a code system, and translations to other code systems.
Codes may be defined very casually in enumerations, or code lists, up to very formal definitions such as SNOMED CT - see the HL7 v3 Core Principles for more information. Ordering of codings is undefined and SHALL NOT be used to infer meaning. Generally, at most only one of the coding values will be labeled as UserSelected = true.
Coding Sliced: Unordered, Open, by system(Value) Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: CE/CNE/CWE subset one of the sets of component 1-3 or 4-6
- rim: CV
- orim: fhir:Coding rdfs:subClassOf dt:CDCoding
- v2: C*E.1-8, C*E.10-22
- rim: union(., ./translation)
- orim: fhir:CodeableConcept.coding rdfs:subPropertyOf dt:CD.coding
|
| fiphrInterpretation | Σ | 1..1 | Coding | There are no (further) constraints on this element Element idObservation.interpretation.coding:fiphrInterpretation Code defined by a terminology system Definition A reference to a code defined by a terminology system.
Allows for alternative encodings within a code system, and translations to other code systems.
Codes may be defined very casually in enumerations, or code lists, up to very formal definitions such as SNOMED CT - see the HL7 v3 Core Principles for more information. Ordering of codings is undefined and SHALL NOT be used to infer meaning. Generally, at most only one of the coding values will be labeled as UserSelected = true.
Coding Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: CE/CNE/CWE subset one of the sets of component 1-3 or 4-6
- rim: CV
- orim: fhir:Coding rdfs:subClassOf dt:CDCoding
- v2: C*E.1-8, C*E.10-22
- rim: union(., ./translation)
- orim: fhir:CodeableConcept.coding rdfs:subPropertyOf dt:CD.coding
|
| id | | 0..1 | | There are no (further) constraints on this element Element idObservation.interpretation.coding:fiphrInterpretation.id Unique id for inter-element referencing Definition Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
|
| extension | I | 0..* | Extension | There are no (further) constraints on this element Element idObservation.interpretation.coding:fiphrInterpretation.extension Additional content defined by implementations Alternate names extensions, user content Definition May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
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.
Extension Sliced: Unordered, Open, by url(Value) Extensions are always sliced by (at least) url Constraints- 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()
|
| system | Σ | 1..1 | uriFixed Value | There are no (further) constraints on this element Element idObservation.interpretation.coding:fiphrInterpretation.system Identity of the terminology system Definition The identification of the code system that defines the meaning of the symbol in the code.
Need to be unambiguous about the source of the definition of the symbol.
The URI may be an OID (urn:oid:...) or a UUID (urn:uuid:...). OIDs and UUIDs SHALL be references to the HL7 OID registry. Otherwise, the URI should come from HL7's list of FHIR defined special URIs or it should reference to some definition that establishes the system clearly and unambiguously.
uri Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
http://terminology.hl7.org/CodeSystem/v3-ObservationInterpretation - rim: n/a
- v2: C*E.3
- rim: ./codeSystem
- orim: fhir:Coding.system rdfs:subPropertyOf dt:CDCoding.codeSystem
|
| version | Σ | 0..1 | string | There are no (further) constraints on this element Element idObservation.interpretation.coding:fiphrInterpretation.version Version of the system - if relevant Definition The version of the code system which was used when choosing this code. Note that a well-maintained code system does not need the version reported, because the meaning of codes is consistent across versions. However this cannot consistently be assured, and when the meaning is not guaranteed to be consistent, the version SHOULD be exchanged.
Where the terminology does not clearly define what string should be used to identify code system versions, the recommendation is to use the date (expressed in FHIR date format) on which that version was officially published as the version date.
string Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: C*E.7
- rim: ./codeSystemVersion
- orim: fhir:Coding.version rdfs:subPropertyOf dt:CDCoding.codeSystemVersion
|
| code | Σ | 1..1 | code | There are no (further) constraints on this element Element idObservation.interpretation.coding:fiphrInterpretation.code Symbol in syntax defined by the system Definition A symbol in syntax defined by the system. The symbol may be a predefined code or an expression in a syntax defined by the coding system (e.g. post-coordination).
Need to refer to a particular code in the system.
Note that FHIR strings SHALL NOT exceed 1MB in size
code Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: C*E.1
- rim: ./code
- orim: fhir:Coding.code rdfs:subPropertyOf dt:CDCoding.code
|
| display | Σ | 1..1 | string | There are no (further) constraints on this element Element idObservation.interpretation.coding:fiphrInterpretation.display Representation defined by the system Definition A representation of the meaning of the code in the system, following the rules of the system.
Need to be able to carry a human-readable meaning of the code for readers that do not know the system.
Note that FHIR strings SHALL NOT exceed 1MB in size
string Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: C*E.2 - but note this is not well followed
- rim: CV.displayName
- orim: fhir:Coding.display rdfs:subPropertyOf dt:CDCoding.displayName
|
| userSelected | Σ | 0..1 | boolean | There are no (further) constraints on this element Element idObservation.interpretation.coding:fiphrInterpretation.userSelected If this coding was chosen directly by the user Definition Indicates that this coding was chosen by a user directly - e.g. off a pick list of available items (codes or displays).
This has been identified as a clinical safety criterium - that this exact system/code pair was chosen explicitly, rather than inferred by the system based on some rules or language processing.
Amongst a set of alternatives, a directly chosen code is the most appropriate starting point for new translations. There is some ambiguity about what exactly 'directly chosen' implies, and trading partner agreement may be needed to clarify the use of this element and its consequences more completely.
boolean Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: Sometimes implied by being first
- rim: CD.codingRationale
- orim: fhir:Coding.userSelected fhir:mapsTo dt:CDCoding.codingRationale. fhir:Coding.userSelected fhir:hasMap fhir:Coding.userSelected.map. fhir:Coding.userSelected.map a fhir:Map; fhir:target dt:CDCoding.codingRationale. fhir:Coding.userSelected\#true a [ fhir:source "true"; fhir:target dt:CDCoding.codingRationale\#O ]
|
| text | Σ | 0..1 | string | There are no (further) constraints on this element Element idObservation.interpretation.text Plain text representation of the concept Definition A human language representation of the concept as seen/selected/uttered by the user who entered the data and/or which represents the intended meaning of the user.
The codes from the terminologies do not always capture the correct meaning with all the nuances of the human using them, or sometimes there is no appropriate code at all. In these cases, the text is used to capture the full meaning of the source.
Very often the text is the same as a displayName of one of the codings.
string Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: C*E.9. But note many systems use C*E.2 for this
- rim: ./originalText[mediaType/code="text/plain"]/data
- orim: fhir:CodeableConcept.text rdfs:subPropertyOf dt:CD.originalText
|
| note | | 0..* | Annotation | There are no (further) constraints on this element Element idShort description Comments about the observation Definition Comments about the observation or the results.
Need to be able to provide free text additional information.
May include general statements about the observation, or statements about significant, unexpected or unreliable results values, or information about its source when relevant to its interpretation.
Annotation Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: N/A
- rim: Act
- v2: NTE.3 (partner NTE to OBX, or sometimes another (child?) OBX)
- rim: subjectOf.observationEvent[code="annotation"].value
|
| id | | 0..1 | | There are no (further) constraints on this element Element idShort description Unique id for inter-element referencing Definition Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
|
| extension | I | 0..* | Extension | There are no (further) constraints on this element Element idObservation.note.extension Additional content defined by implementations Alternate names extensions, user content Definition May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
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.
Extension Sliced: Unordered, Open, by url(Value) Extensions are always sliced by (at least) url Constraints- 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()
|
| author[x] | Σ | 0..0 | Fixed Value | There are no (further) constraints on this element Element idObservation.note.author[x] Individual responsible for the annotation Definition The individual responsible for making the annotation.
Organization is used when there's no need for specific attribution as to who made the comment.
- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
{
"reference": "http://phr.kanta.fi/StructureDefinition/fiphr-sd-patient"
}- rim: n/a
- v2: N/A
- rim: Act.participant[typeCode=AUT].role
|
| time | Σ | 0..1 | dateTime | There are no (further) constraints on this element Element idShort description When the annotation was made Definition Indicates when this particular annotation was made.
dateTime Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: N/A
- rim: Act.effectiveTime
|
| text | Σ | 1..1 | markdown | There are no (further) constraints on this element Element idShort description The annotation - text content (as markdown) Definition The text of the annotation in markdown format.
Systems are not required to have markdown support, so the text should be readable without markdown processing. The markdown syntax is GFM - see https://github.github.com/gfm/
markdown Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: N/A
- rim: Act.text
|
| bodySite | | 0..0 | CodeableConcept | There are no (further) constraints on this element Element idShort description Observed body part Definition Indicates the site on the subject's body where the observation was made (i.e. the target site).
Only used if not implicit in code found in Observation.code. In many systems, this may be represented as a related observation instead of an inline component.
If the use case requires BodySite to be handled as a separate resource (e.g. to identify and track separately) then use the standard extension bodySite.
CodeableConcept Binding Codes describing anatomical locations. May include laterality.
- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: CE/CNE/CWE
- rim: CD
- orim: fhir:CodeableConcept rdfs:subClassOf dt:CD
- sct-concept: < 123037004 |Body structure|
- v2: OBX-20
- rim: targetSiteCode
- sct-attr: 718497002 |Inherent location|
|
| method | | 0..0 | CodeableConcept | There are no (further) constraints on this element Element idShort description How it was done Definition Indicates the mechanism used to perform the observation.
In some cases, method can impact results and is thus used for determining whether results can be compared or determining significance of results.
Only used if not implicit in code for Observation.code.
CodeableConcept Binding Methods for simple observations.
- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: CE/CNE/CWE
- rim: CD
- orim: fhir:CodeableConcept rdfs:subClassOf dt:CD
- v2: OBX-17
- rim: methodCode
|
| specimen | I | 0..0 | Reference(Specimen) | There are no (further) constraints on this element Element idShort description Specimen used for this observation Definition The specimen that was used when this observation was made.
Should only be used if not implicit in code found in Observation.code. Observations are not made on specimens themselves; they are made on a subject, but in many cases by the means of a specimen. Note that although specimens are often involved, they are not always tracked and reported explicitly. Also note that observation resources may be used in contexts that track the specimen explicitly (e.g. Diagnostic Report).
Reference(Specimen) Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count()) - ref-1: SHALL have a contained resource if a local reference is provided
reference.startsWith('#').not() or (reference.substring(1).trace('url') in %resource.contained.id.trace('ids'))
- rim: n/a
- rim: The target of a resource reference is a RIM entry point (Act, Role, or Entity)
- sct-concept: < 123038009 |Specimen|
- v2: SPM segment
- rim: participation[typeCode=SPC].specimen
- sct-attr: 704319004 |Inherent in|
|
| device | I | 0..0 | Reference(Device | DeviceMetric) | There are no (further) constraints on this element Element idShort description (Measurement) Device Definition The device used to generate the observation data.
Note that this is not meant to represent a device involved in the transmission of the result, e.g., a gateway. Such devices may be documented using the Provenance resource where relevant.
Reference(Device | DeviceMetric) Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count()) - ref-1: SHALL have a contained resource if a local reference is provided
reference.startsWith('#').not() or (reference.substring(1).trace('url') in %resource.contained.id.trace('ids'))
- rim: n/a
- rim: The target of a resource reference is a RIM entry point (Act, Role, or Entity)
- sct-concept: < 49062001 |Device|
- v2: OBX-17 / PRT -10
- rim: participation[typeCode=DEV]
- sct-attr: 424226004 |Using device|
|
| referenceRange | I | 0..* | BackboneElement | There are no (further) constraints on this element Element idObservation.referenceRange Provides guide for interpretation Definition Guidance on how to interpret the value by comparison to a normal or recommended range. Multiple reference ranges are interpreted as an "OR". In other words, to represent two distinct target populations, two referenceRange elements would be used.
Knowing what values are considered "normal" can help evaluate the significance of a particular result. Need to be able to provide multiple reference ranges for different contexts.
Most observations only have one generic reference range. Systems MAY choose to restrict to only supplying the relevant reference range based on knowledge about the patient (e.g., specific to the patient's age, gender, weight and other factors), but this might not be possible or appropriate. Whenever more than one reference range is supplied, the differences between them SHOULD be provided in the reference range and/or age properties.
BackboneElement Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count()) - obs-3: Must have at least a low or a high or text
low.exists() or high.exists() or text.exists()
- rim: n/a
- v2: OBX.7
- rim: outboundRelationship[typeCode=REFV]/target[classCode=OBS, moodCode=EVN]
|
| id | | 0..1 | | There are no (further) constraints on this element Element idObservation.referenceRange.id Unique id for inter-element referencing Definition Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
|
| extension | I | 0..* | Extension | There are no (further) constraints on this element Element idObservation.referenceRange.extension Additional content defined by implementations Alternate names extensions, user content Definition May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
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.
Extension Sliced: Unordered, Open, by url(Value) Extensions are always sliced by (at least) url Constraints- 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()
|
| modifierExtension | Σ ?! I | 0..* | Extension | There are no (further) constraints on this element Element idObservation.referenceRange.modifierExtension Extensions that cannot be ignored even if unrecognized Alternate names extensions, user content, modifiers Definition May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.
Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).
Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions.
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.
Extension Constraints- 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()
|
| low | I | 0..1 | SimpleQuantity | There are no (further) constraints on this element Element idObservation.referenceRange.low Low Range, if relevant Definition The value of the low bound of the reference range. The low bound of the reference range endpoint is inclusive of the value (e.g. reference range is >=5 - <=9). If the low bound is omitted, it is assumed to be meaningless (e.g. reference range is <=2.3).
The context of use may frequently define what kind of quantity this is and therefore what kind of units can be used. The context of use may also restrict the values for the comparator.
SimpleQuantity Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count()) - qty-3: If a code for the unit is present, the system SHALL also be present
code.empty() or system.exists() - sqty-1: The comparator is not used on a SimpleQuantity
comparator.empty()
- rim: n/a
- v2: SN (see also Range) or CQ
- rim: PQ, IVL<PQ>, MO, CO, depending on the values
- v2: OBX-7
- rim: value:IVL_PQ.low
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| high | I | 0..1 | SimpleQuantity | There are no (further) constraints on this element Element idObservation.referenceRange.high High Range, if relevant Definition The value of the high bound of the reference range. The high bound of the reference range endpoint is inclusive of the value (e.g. reference range is >=5 - <=9). If the high bound is omitted, it is assumed to be meaningless (e.g. reference range is >= 2.3).
The context of use may frequently define what kind of quantity this is and therefore what kind of units can be used. The context of use may also restrict the values for the comparator.
SimpleQuantity Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count()) - qty-3: If a code for the unit is present, the system SHALL also be present
code.empty() or system.exists() - sqty-1: The comparator is not used on a SimpleQuantity
comparator.empty()
- rim: n/a
- v2: SN (see also Range) or CQ
- rim: PQ, IVL<PQ>, MO, CO, depending on the values
- v2: OBX-7
- rim: value:IVL_PQ.high
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| type | | 0..1 | CodeableConceptBinding | There are no (further) constraints on this element Element idObservation.referenceRange.type Reference range qualifier Definition Codes to indicate the what part of the targeted reference population it applies to. For example, the normal or therapeutic range.
Need to be able to say what kind of reference range this is - normal, recommended, therapeutic, etc., - for proper interpretation.
This SHOULD be populated if there is more than one range. If this element is not present then the normal range is assumed.
CodeableConcept Binding Code for the meaning of a reference range.
- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: CE/CNE/CWE
- rim: CD
- orim: fhir:CodeableConcept rdfs:subClassOf dt:CD
- sct-concept: < 260245000 |Findings values| OR
< 365860008 |General clinical state finding|
OR
< 250171008 |Clinical history or observation findings| OR
< 415229000 |Racial group| OR
< 365400002 |Finding of puberty stage| OR
< 443938003 |Procedure carried out on subject|
- v2: OBX-10
- rim: interpretationCode
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| appliesTo | | 0..* | CodeableConcept | There are no (further) constraints on this element Element idObservation.referenceRange.appliesTo Reference range population Definition Codes to indicate the target population this reference range applies to. For example, a reference range may be based on the normal population or a particular sex or race. Multiple appliesTo are interpreted as an "AND" of the target populations. For example, to represent a target population of African American females, both a code of female and a code for African American would be used.
Need to be able to identify the target population for proper interpretation.
This SHOULD be populated if there is more than one range. If this element is not present then the normal population is assumed.
CodeableConcept Binding Codes identifying the population the reference range applies to.
- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: CE/CNE/CWE
- rim: CD
- orim: fhir:CodeableConcept rdfs:subClassOf dt:CD
- sct-concept: < 260245000 |Findings values| OR
< 365860008 |General clinical state finding|
OR
< 250171008 |Clinical history or observation findings| OR
< 415229000 |Racial group| OR
< 365400002 |Finding of puberty stage| OR
< 443938003 |Procedure carried out on subject|
- v2: OBX-10
- rim: interpretationCode
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| age | I | 0..1 | Range | There are no (further) constraints on this element Element idObservation.referenceRange.age Applicable age range, if relevant Definition The age at which this reference range is applicable. This is a neonatal age (e.g. number of weeks at term) if the meaning says so.
Some analytes vary greatly over age.
The stated low and high value are assumed to have arbitrarily high precision when it comes to determining which values are in the range. I.e. 1.99 is not in the range 2 -> 3.
Range Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count()) - rng-2: If present, low SHALL have a lower value than high
low.empty() or high.empty() or (low <= high)
- rim: n/a
- v2: NR and also possibly SN (but see also quantity)
- rim: IVL<QTY[not(type="TS")]> [lowClosed="true" and highClosed="true"]or URG<QTY[not(type="TS")]>
- rim: outboundRelationship[typeCode=PRCN].targetObservationCriterion[code="age"].value
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| text | | 0..1 | string | There are no (further) constraints on this element Element idObservation.referenceRange.text Text based reference range in an observation Definition Text based reference range in an observation which may be used when a quantitative range is not appropriate for an observation. An example would be a reference value of "Negative" or a list or table of "normals".
Note that FHIR strings SHALL NOT exceed 1MB in size
string Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: OBX-7
- rim: value:ST
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| hasMember | Σ I | 0..* | Reference(QuestionnaireResponse | https://hl7.org/fhir/StructureDefinition/Observation) | There are no (further) constraints on this element Element idShort description Used when reporting vital signs panel components Definition Used when reporting vital signs panel components.
When using this element, an observation will typically have either a value or a set of related resources, although both may be present in some cases. For a discussion on the ways Observations can assembled in groups together, see Notes below. Note that a system may calculate results from QuestionnaireResponse into a final score and represent the score as an Observation.
Reference(QuestionnaireResponse | https://hl7.org/fhir/StructureDefinition/Observation) Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count()) - ref-1: SHALL have a contained resource if a local reference is provided
reference.startsWith('#').not() or (reference.substring(1).trace('url') in %resource.contained.id.trace('ids'))
- rim: n/a
- rim: The target of a resource reference is a RIM entry point (Act, Role, or Entity)
- v2: Relationships established by OBX-4 usage
- rim: outBoundRelationship
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| id | | 0..1 | | There are no (further) constraints on this element Element idShort description Unique id for inter-element referencing Definition Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
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| extension | I | 0..* | Extension | There are no (further) constraints on this element Element idObservation.hasMember.extension Additional content defined by implementations Alternate names extensions, user content Definition May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
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.
Extension Sliced: Unordered, Open, by url(Value) Extensions are always sliced by (at least) url Constraints- 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()
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| reference | Σ I | 0..1 | string | There are no (further) constraints on this element Element idObservation.hasMember.reference Literal reference, Relative, internal or absolute URL Definition A reference to a location at which the other resource is found. The reference may be a relative reference, in which case it is relative to the service base URL, or an absolute URL that resolves to the location where the resource is found. The reference may be version specific or not. If the reference is not to a FHIR RESTful server, then it should be assumed to be version specific. Internal fragment references (start with '#') refer to contained resources.
Using absolute URLs provides a stable scalable approach suitable for a cloud/web context, while using relative/logical references provides a flexible approach suitable for use when trading across closed eco-system boundaries. Absolute URLs do not need to point to a FHIR RESTful server, though this is the preferred approach. If the URL conforms to the structure "/[type]/[id]" then it should be assumed that the reference is to a FHIR RESTful server.
string Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
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| type | Σ | 0..1 | uriBinding | There are no (further) constraints on this element Element idObservation.hasMember.type Type the reference refers to (e.g. "Patient") Definition The expected type of the target of the reference. If both Reference.type and Reference.reference are populated and Reference.reference is a FHIR URL, both SHALL be consistent.
The type is the Canonical URL of Resource Definition that is the type this reference refers to. References are URLs that are relative to http://hl7.org/fhir/StructureDefinition/ e.g. "Patient" is a reference to http://hl7.org/fhir/StructureDefinition/Patient. Absolute URLs are only allowed for logical models (and can only be used in references in logical models, not resources).
This element is used to indicate the type of the target of the reference. This may be used which ever of the other elements are populated (or not). In some cases, the type of the target may be determined by inspection of the reference (e.g. a RESTful URL) or by resolving the target of the reference; if both the type and a reference is provided, the reference SHALL resolve to a resource of the same type as that specified.
uri Binding Aa resource (or, for logical models, the URI of the logical model).
- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
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| identifier | Σ | 0..1 | Identifier | There are no (further) constraints on this element Element idObservation.hasMember.identifier Logical reference, when literal reference is not known Definition An identifier for the target resource. This is used when there is no way to reference the other resource directly, either because the entity it represents is not available through a FHIR server, or because there is no way for the author of the resource to convert a known identifier to an actual location. There is no requirement that a Reference.identifier point to something that is actually exposed as a FHIR instance, but it SHALL point to a business concept that would be expected to be exposed as a FHIR instance, and that instance would need to be of a FHIR resource type allowed by the reference.
When an identifier is provided in place of a reference, any system processing the reference will only be able to resolve the identifier to a reference if it understands the business context in which the identifier is used. Sometimes this is global (e.g. a national identifier) but often it is not. For this reason, none of the useful mechanisms described for working with references (e.g. chaining, includes) are possible, nor should servers be expected to be able resolve the reference. Servers may accept an identifier based reference untouched, resolve it, and/or reject it - see CapabilityStatement.rest.resource.referencePolicy.
When both an identifier and a literal reference are provided, the literal reference is preferred. Applications processing the resource are allowed - but not required - to check that the identifier matches the literal reference
Applications converting a logical reference to a literal reference may choose to leave the logical reference present, or remove it.
Reference is intended to point to a structure that can potentially be expressed as a FHIR resource, though there is no need for it to exist as an actual FHIR resource instance - except in as much as an application wishes to actual find the target of the reference. The content referred to be the identifier must meet the logical constraints implied by any limitations on what resource types are permitted for the reference. For example, it would not be legitimate to send the identifier for a drug prescription if the type were Reference(Observation|DiagnosticReport). One of the use-cases for Reference.identifier is the situation where no FHIR representation exists (where the type is Reference (Any).
Identifier Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: CX / EI (occasionally, more often EI maps to a resource id or a URL)
- rim: II - The Identifier class is a little looser than the v3 type II because it allows URIs as well as registered OIDs or GUIDs. Also maps to Role[classCode=IDENT]
- servd: Identifier
- rim: .identifier
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| id | | 0..1 | | There are no (further) constraints on this element Element idObservation.hasMember.identifier.id Unique id for inter-element referencing Definition Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
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| extension | I | 0..* | Extension | There are no (further) constraints on this element Element idObservation.hasMember.identifier.extension Additional content defined by implementations Alternate names extensions, user content Definition May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
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.
Extension Sliced: Unordered, Open, by url(Value) Extensions are always sliced by (at least) url Constraints- 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()
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| use | Σ ?! | 0..1 | codeBinding | There are no (further) constraints on this element Element idObservation.hasMember.identifier.use usual | official | temp | secondary | old (If known) Definition The purpose of this identifier.
Allows the appropriate identifier for a particular context of use to be selected from among a set of identifiers.
Applications can assume that an identifier is permanent unless it explicitly says that it is temporary.
code Binding Identifies the purpose for this identifier, if known .
- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: N/A
- rim: Role.code or implied by context
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| type | Σ | 0..1 | CodeableConceptBinding | There are no (further) constraints on this element Element idObservation.hasMember.identifier.type Description of identifier Definition A coded type for the identifier that can be used to determine which identifier to use for a specific purpose.
Allows users to make use of identifiers when the identifier system is not known.
This element deals only with general categories of identifiers. It SHOULD not be used for codes that correspond 1..1 with the Identifier.system. Some identifiers may fall into multiple categories due to common usage. Where the system is known, a type is unnecessary because the type is always part of the system definition. However systems often need to handle identifiers where the system is not known. There is not a 1:1 relationship between type and system, since many different systems have the same type.
CodeableConcept Binding A coded type for an identifier that can be used to determine which identifier to use for a specific purpose.
- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
- rim: n/a
- v2: CE/CNE/CWE
- rim: CD
- orim: fhir:CodeableConcept rdfs:subClassOf dt:CD
- v2: CX.5
- rim: Role.code or implied by context
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| system | Σ | 0..1 | uri | There are no (further) constraints on this element Element idObservation.hasMember.identifier.system The namespace for the identifier value Definition Establishes the namespace for the value - that is, a URL that describes a set values that are unique.
There are many sets of identifiers. To perform matching of two identifiers, we need to know what set we're dealing with. The system identifies a particular set of unique identifiers.
Identifier.system is always case sensitive.
uri Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
Generalhttp://www.acme.com/identifiers/patient
Mappings- rim: n/a
- v2: CX.4 / EI-2-4
- rim: II.root or Role.id.root
- servd: ./IdentifierType
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| value | Σ | 0..1 | string | There are no (further) constraints on this element Element idObservation.hasMember.identifier.value The value that is unique Definition The portion of the identifier typically relevant to the user and which is unique within the context of the system.
If the value is a full URI, then the system SHALL be urn:ietf:rfc:3986. The value's primary purpose is computational mapping. As a result, it may be normalized for comparison purposes (e.g. removing non-significant whitespace, dashes, etc.) A value formatted for human display can be conveyed using the Rendered Value extension. Identifier.value is to be treated as case sensitive unless knowledge of the Identifier.system allows the processer to be confident that non-case-sensitive processing is safe.
string Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
Mappings- rim: n/a
- v2: CX.1 / EI.1
- rim: II.extension or II.root if system indicates OID or GUID (Or Role.id.extension or root)
- servd: ./Value
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| period | Σ I | 0..1 | Period | There are no (further) constraints on this element Element idObservation.hasMember.identifier.period Time period when id is/was valid for use Definition Time period during which identifier is/was valid for use.
A Period specifies a range of time; the context of use will specify whether the entire range applies (e.g. "the patient was an inpatient of the hospital for this time range") or one value from the range applies (e.g. "give to the patient between these two times").
Period is not used for a duration (a measure of elapsed time). See Duration.
Period Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count()) - per-1: If present, start SHALL have a lower value than end
start.hasValue().not() or end.hasValue().not() or (start <= end)
- rim: n/a
- v2: DR
- rim: IVL<TS>[lowClosed="true" and highClosed="true"] or URG<TS>[lowClosed="true" and highClosed="true"]
- v2: CX.7 + CX.8
- rim: Role.effectiveTime or implied by context
- servd: ./StartDate and ./EndDate
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| assigner | Σ I | 0..0 | Reference(Organization) | There are no (further) constraints on this element Element idObservation.hasMember.identifier.assigner Organization that issued id (may be just text) Definition Organization that issued/manages the identifier.
The Identifier.assigner may omit the .reference element and only contain a .display element reflecting the name or other textual information about the assigning organization.
Reference(Organization) Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count()) - ref-1: SHALL have a contained resource if a local reference is provided
reference.startsWith('#').not() or (reference.substring(1).trace('url') in %resource.contained.id.trace('ids'))
- rim: n/a
- rim: The target of a resource reference is a RIM entry point (Act, Role, or Entity)
- v2: CX.4 / (CX.4,CX.9,CX.10)
- rim: II.assigningAuthorityName but note that this is an improper use by the definition of the field. Also Role.scoper
- servd: ./IdentifierIssuingAuthority
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| display | Σ | 0..1 | string | There are no (further) constraints on this element Element idObservation.hasMember.display Text alternative for the resource Definition Plain text narrative that identifies the resource in addition to the resource reference.
This is generally not the same as the Resource.text of the referenced resource. The purpose is to identify what's being referenced, not to fully describe it.
string Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count())
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| derivedFrom | Σ I | 0..0 | Reference(DocumentReference | ImagingStudy | Media | QuestionnaireResponse | MolecularSequence | Vital Signs Profile) | There are no (further) constraints on this element Element idShort description Related measurements the observation is made from Definition The target resource that represents a measurement from which this observation value is derived. For example, a calculated anion gap or a fetal measurement based on an ultrasound image.
All the reference choices that are listed in this element can represent clinical observations and other measurements that may be the source for a derived value. The most common reference will be another Observation. For a discussion on the ways Observations can assembled in groups together, see Notes below.
Reference(DocumentReference | ImagingStudy | Media | QuestionnaireResponse | MolecularSequence | Vital Signs Profile) Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count()) - ref-1: SHALL have a contained resource if a local reference is provided
reference.startsWith('#').not() or (reference.substring(1).trace('url') in %resource.contained.id.trace('ids'))
- rim: n/a
- rim: The target of a resource reference is a RIM entry point (Act, Role, or Entity)
- v2: Relationships established by OBX-4 usage
- rim: .targetObservation
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| component | S Σ I | 0..0 | BackboneElement | There are no (further) constraints on this element Element idShort description Used when reporting systolic and diastolic blood pressure. Definition Used when reporting systolic and diastolic blood pressure.
Component observations share the same attributes in the Observation resource as the primary observation and are always treated a part of a single observation (they are not separable). However, the reference range for the primary observation value is not inherited by the component values and is required when appropriate for each component observation.
Profiled further in derived profiles that use components.
BackboneElement Constraints- ele-1: All FHIR elements must have a @value or children
hasValue() or (children().count() > id.count()) - vs-3: If there is no a value a data absent reason must be present
value.exists() or dataAbsentReason.exists()
- rim: n/a
- v2: containment by OBX-4?
- rim: outBoundRelationship[typeCode=COMP]
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