Singapore Core Data for Interoperability (SGCDI)

ScreeningSummary

A Bundle of Observation resources will be used to store the screening summary which is associated to an encounter within a patient visit.

Key Design Considerations

To indicate observations made for screening examinations of a patient, the category.coding.code should be exam.

Bundle	C		Bundle	There are no (further) constraints on this element Element id Bundle Short description Contains a collection of resources Definition A container for a collection of resources. Data type Bundle Constraints bdl-7: FullUrl must be unique in a bundle, or else entries with the same fullUrl must have different meta.versionId (except in history bundles) `(type = 'history') or entry.where(fullUrl.exists()).select(fullUrl&iif(resource.meta.versionId.exists(), resource.meta.versionId, '')).isDistinct()` bdl-9: A document must have an identifier with a system and a value `type = 'document' implies (identifier.system.exists() and identifier.value.exists())` bdl-17: Use and meaning of issues for documents has not been validated because the content will not be rendered in the document. `type = 'document' implies issues.empty()` bdl-16: Issue.severity for all issues within the OperationOutcome must be either 'information' or 'warning'. `issues.exists() implies (issues.issue.severity = 'information' or issues.issue.severity = 'warning')` bdl-18: Self link is required for searchsets. `type = 'searchset' implies link.where(relation = 'self' and url.exists()).exists()` bdl-13: A subscription-notification must have a SubscriptionStatus as the first resource `type = 'subscription-notification' implies entry.first().resource.is(SubscriptionStatus)` bdl-12: A message must have a MessageHeader as the first resource `type = 'message' implies entry.first().resource.is(MessageHeader)` bdl-15: Bundle resources where type is not transaction, transaction-response, batch, or batch-response or when the request is a POST SHALL have Bundle.entry.fullUrl populated `type='transaction' or type='transaction-response' or type='batch' or type='batch-response' or entry.all(fullUrl.exists() or request.method='POST')` bdl-14: entry.request.method PATCH not allowed for history `type = 'history' implies entry.request.method != 'PATCH'` bdl-11: A document must have a Composition as the first resource `type = 'document' implies entry.first().resource.is(Composition)` bdl-10: A document must have a date `type = 'document' implies (timestamp.hasValue())` bdl-3d: For collections of type transaction-response or batch-response, all entries must contain response elements `type in ('transaction-response' \| 'batch-response') implies entry.all(response.exists())` bdl-1: total only when a search or history `total.empty() or (type = 'searchset') or (type = 'history')` bdl-2: entry.search only when a search `(type = 'searchset') or entry.search.empty()` bdl-3a: For collections of type document, message, searchset or collection, all entries must contain resources, and not have request or response elements `type in ('document' \| 'message' \| 'searchset' \| 'collection') implies entry.all(resource.exists() and request.empty() and response.empty())` bdl-3c: For collections of type transaction or batch, all entries must contain request elements, and resources if the method is POST, PUT or PATCH `type in ('transaction' \| 'batch') implies entry.all(request.method.exists() and ((request.method in ('POST' \| 'PATCH' \| 'PUT')) = resource.exists()))` bdl-3b: For collections of type history, all entries must contain request or response elements, and resources if the method is POST, PUT or PATCH `type = 'history' implies entry.all(request.exists() and response.exists() and ((request.method in ('POST' \| 'PATCH' \| 'PUT')) = resource.exists()))` Mappings rim: n/a rim: Entity. Role, or Act w5: infrastructure.structure v2: N/A rim: N/A cda: ClinicalDocument, if bundle.type = document
id	Σ	0..1	id	There are no (further) constraints on this element Element id Bundle.id Short 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. Comments Within the context of the FHIR RESTful interactions, the resource has an id except for cases like the create and conditional update. Otherwise, the use of the resouce id depends on the given use case. Data type id
meta	Σ	0..1	Meta	There are no (further) constraints on this element Element id Bundle.meta Short 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. Data type Meta Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a rim: N/A
implicitRules	Σ ?!	0..1	uri	There are no (further) constraints on this element Element id Bundle.implicitRules Short description 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. Comments Asserting this rule set restricts the content to be only understood by a limited set of trading partners. This inherently limits the usefulness of the data in the long term. However, the existing health eco-system is highly fractured, and not yet ready to define, collect, and exchange data in a generally computable sense. Wherever possible, implementers and/or specification writers should avoid using this element. Often, when used, the URL is a reference to an implementation guide that defines these special rules as part of its narrative along with other profiles, value sets, etc. Data type uri Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a
language		0..1	codeBinding	There are no (further) constraints on this element Element id Bundle.language Short description Language of the resource content Definition The base language in which the resource is written. Comments Language is provided to support indexing and accessibility (typically, services such as text to speech use the language tag). The html language tag in the narrative applies to the narrative. The language tag on the resource may be used to specify the language of other presentations generated from the data in the resource. Not all the content has to be in the base language. The Resource.language should not be assumed to apply to the narrative automatically. If a language is specified, it should it also be specified on the div element in the html (see rules in HTML5 for information about the relationship between xml:lang and the html lang attribute). Data type code Binding IETF language tag for a human language AllLanguages (required) Additional bindings CommonLanguages (starter) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a
identifier	Σ C	1..1	Identifier	There are no (further) constraints on this element Element id Bundle.identifier Short description Persistent identifier for the bundle Definition A persistent identifier for the bundle that won't change as a bundle is copied from server to server. Comments Persistent identity generally only matters for batches of type Document, Message, and Collection. It would not normally be populated for search and history results and servers ignore Bundle.identifier when processing batches and transactions. For Documents the .identifier SHALL be populated such that the .identifier is globally unique. Data type Identifier Conditions The cardinality or value of this element may be affected by these constraints: bdl-9 Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` ident-1: Identifier with no value has limited utility. If communicating that an identifier value has been suppressed or missing, the value element SHOULD be present with an extension indicating the missing semantic - e.g. data-absent-reason `value.exists()` Mappings 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 w5: FiveWs.identifier cda: ClinicalDocument.id
id		0..1	string	There are no (further) constraints on this element Element id Bundle.identifier.id Short 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. Data type string Conditions The cardinality or value of this element may be affected by these constraints: ele-1 Mappings rim: n/a
extension	C	0..*	Extension	There are no (further) constraints on this element Element id Bundle.identifier.extension Short 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 element. To make the use of extensions safe and managable, 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. Comments There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone. Data type Extension Slicing 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()` Mappings rim: n/a rim: N/A
use	Σ ?!	0..1	codeBinding	There are no (further) constraints on this element Element id Bundle.identifier.use Short description usual \| official \| temp \| secondary \| old (If known) Definition The purpose of this identifier. Requirements Allows the appropriate identifier for a particular context of use to be selected from among a set of identifiers. Comments Applications can assume that an identifier is permanent unless it explicitly says that it is temporary. Data type code Binding Identifies the purpose for this identifier, if known . IdentifierUse (required) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings 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 id Bundle.identifier.type Short description Description of identifier Definition A coded type for the identifier that can be used to determine which identifier to use for a specific purpose. Requirements Allows users to make use of identifiers when the identifier system is not known. Comments This element deals only with general categories of identifiers. It SHOULD not be used for codes that correspond 1..1 with the Identifier.system. Some identifiers may fall into multiple categories due to common usage. Where the system is known, a type is unnecessary because the type is always part of the system definition. However systems often need to handle identifiers where the system is not known. There is not a 1:1 relationship between type and system, since many different systems have the same type. Data type CodeableConcept Binding A coded type for an identifier that can be used to determine which identifier to use for a specific purpose. IdentifierTypeCodes (extensible) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings 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	uriFixed Value	Element id Bundle.identifier.system Short description The namespace for the identifier value Definition Establishes the namespace for the value - that is, an absolute URL that describes a set values that are unique. Requirements There are many sets of identifiers. To perform matching of two identifiers, we need to know what set we're dealing with. The system identifies a particular set of unique identifiers. Comments Identifier.system is always case sensitive. Data type uri Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Fixed value https://fhir.synap Examples General http://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 C	0..1	string	There are no (further) constraints on this element Element id Bundle.identifier.value Short description 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. Comments If the value is a full URI, then the system SHALL be urn:ietf:rfc:3986. The value's primary purpose is computational mapping. As a result, it may be normalized for comparison purposes (e.g. removing non-significant whitespace, dashes, etc.) A value formatted for human display can be conveyed using the http://hl7.org/fhir/StructureDefinition/rendered-value). 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. Data type string Conditions The cardinality or value of this element may be affected by these constraints: ident-1 Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Examples General 123456 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 C	0..1	Period	There are no (further) constraints on this element Element id Bundle.identifier.period Short description Time period when id is/was valid for use Definition Time period during which identifier is/was valid for use. Comments 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. Data type 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 or equal value than end `start.hasValue().not() or end.hasValue().not() or (start.lowBoundary() <= end.highBoundary())` Mappings 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 C	0..1	Reference(Organization)	There are no (further) constraints on this element Element id Bundle.identifier.assigner Short description Organization that issued id (may be just text) Definition Organization that issued/manages the identifier. Comments The Identifier.assigner may omit the .reference element and only contain a .display element reflecting the name or other textual information about the assigning organization. Data type 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.exists() implies (reference.startsWith('#').not() or (reference.substring(1).trace('url') in %rootResource.contained.id.trace('ids')) or (reference='#' and %rootResource!=%resource))` ref-2: At least one of reference, identifier and display SHALL be present (unless an extension is provided). `reference.exists() or identifier.exists() or display.exists() or extension.exists()` Mappings 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
type	Σ C	1..1	codeBindingPattern	Element id Bundle.type Short description document \| message \| transaction \| transaction-response \| batch \| batch-response \| history \| searchset \| collection \| subscription-notification Definition Indicates the purpose of this bundle - how it is intended to be used. Comments It's possible to use a bundle for other purposes (e.g. a document can be accepted as a transaction). This is primarily defined so that there can be specific rules for some of the bundle types. Data type code Binding Indicates the purpose of a bundle - how it is intended to be used. BundleType (required) Conditions The cardinality or value of this element may be affected by these constraints: bdl-1, bdl-2, bdl-3a, bdl-3b, bdl-3c, bdl-3d, bdl-7, bdl-9, bdl-10, bdl-11, bdl-12, bdl-13, bdl-14, bdl-15, bdl-17, bdl-18 Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Pattern transaction Mappings rim: n/a w5: FiveWs.class
timestamp	Σ C	0..0	instant	There are no (further) constraints on this element Element id Bundle.timestamp Short description When the bundle was assembled Definition The date/time that the bundle was assembled - i.e. when the resources were placed in the bundle. Comments For many bundles, the timestamp is equal to .meta.lastUpdated, because they are not stored (e.g. search results). When a bundle is placed in a persistent store, .meta.lastUpdated will be usually be changed by the server. When the bundle is a message, a middleware agent altering the message (even if not stored) SHOULD update .meta.lastUpdated. .timestamp is used to track the original time of the Bundle, and SHOULD be populated. Usage: document : the date the document was created. Note: the composition may predate the document, or be associated with multiple documents. The date of the composition - the authoring time - may be earlier than the document assembly time message : the date that the content of the message was assembled. This date is not changed by middleware engines unless they add additional data that changes the meaning of the time of the message history : the date that the history was assembled. This time would be used as the _since time to ask for subsequent updates searchset : the time that the search set was assembled. Note that different pages MAY have different timestamps but need not. Having different timestamps does not imply that subsequent pages will represent or include changes made since the initial query transaction \| transaction-response \| batch \| batch-response \| collection : no particular assigned meaning The timestamp value should be greater than the lastUpdated and other timestamps in the resources in the bundle, and it should be equal or earlier than the .meta.lastUpdated on the Bundle itself. Data type instant Conditions The cardinality or value of this element may be affected by these constraints: bdl-10 Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a w5: FiveWs.init cda: ClinicalDocument.effectiveTime
total	Σ C	0..0	unsignedInt	There are no (further) constraints on this element Element id Bundle.total Short description If search, the total number of matches Definition If a set of search matches, this is the (potentially estimated) total number of entries of type 'match' across all pages in the search. It does not include search.mode = 'include' or 'outcome' entries and it does not provide a count of the number of entries in the Bundle. Comments Only used if the bundle is a search result set. The total does not include resources such as OperationOutcome and included resources, only the total number of matching resources. Data type unsignedInt Conditions The cardinality or value of this element may be affected by these constraints: bdl-1 Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a
link	Σ C	0..0	BackboneElement	There are no (further) constraints on this element Element id Bundle.link Short description Links related to this Bundle Definition A series of links that provide context to this bundle. Comments Both Bundle.link and Bundle.entry.link are defined to support providing additional context when Bundles are used (e.g. HATEOAS). Bundle.entry.link corresponds to links found in the HTTP header if the resource in the entry was read directly. This specification defines some specific uses of Bundle.link for searching and paging, but no specific uses for Bundle.entry.link, and no defined function in a transaction - the meaning is implementation specific. The behavior of navigation link types (next/prev/first/last) are well defined for searchset and history Bundles but are not currently defined for other types. Implementers who choose to use such link relationships for other bundle types will need to negotiate behavior with their interoperability partners. Data type BackboneElement Conditions The cardinality or value of this element may be affected by these constraints: bdl-18 Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a
entry	Σ C	1..*	BackboneElement	There are no (further) constraints on this element Element id Bundle.entry Short description Entry in the bundle - will have a resource or information Definition An entry in a bundle resource - will either contain a resource or information about a resource (transactions and history only). Data type BackboneElement Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` bdl-8: fullUrl cannot be a version specific reference `fullUrl.exists() implies fullUrl.contains('/_history/').not()` bdl-5: must be a resource unless there's a request or response `resource.exists() or request.exists() or response.exists()` Mappings rim: n/a
id		0..0	string	There are no (further) constraints on this element Element id Bundle.entry.id Short 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. Data type string Conditions The cardinality or value of this element may be affected by these constraints: ele-1 Mappings rim: n/a
extension	C	0..0	Extension	There are no (further) constraints on this element Element id Bundle.entry.extension Short 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 element. To make the use of extensions safe and managable, 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. Comments There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone. Data type Extension Slicing 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()` Mappings rim: n/a rim: N/A
modifierExtension	Σ ?! C	0..0	Extension	There are no (further) constraints on this element Element id Bundle.entry.modifierExtension Short description 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 managable, 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). Requirements Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions. Comments There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone. Data type 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()` Mappings rim: n/a rim: N/A
link	Σ	0..0	see (link)	There are no (further) constraints on this element Element id Bundle.entry.link Short description Links related to this entry Definition A series of links that provide context to this entry.
fullUrl	Σ C	1..1	uri	There are no (further) constraints on this element Element id Bundle.entry.fullUrl Short description URI for resource (e.g. the absolute URL server address, URI for UUID/OID, etc.) Definition The Absolute URL for the resource. Except for transactions and batches, each entry in a Bundle must have a fullUrl. The fullUrl SHALL NOT disagree with the id in the resource - i.e. if the fullUrl is not a urn:uuid, the URL shall be version-independent URL consistent with the Resource.id. The fullUrl is a version independent reference to the resource. Even when not required, fullUrl MAY be set to a urn:uuid to allow referencing entries in a transaction. The fullUrl can be an arbitrary URI and is not limited to urn:uuid, urn:oid, http, and https. The fullUrl element SHALL have a value except when: invoking a create invoking or responding to an operation where the body is not a single identified resource invoking or returning the results of a search or history operation. Comments fullUrl might not be unique in the context of a resource. Note that since FHIR resources do not need to be served through the FHIR API, the fullURL might be a URN or an absolute URL that does not end with the logical id of the resource (Resource.id). However, but if the fullUrl does look like a RESTful server URL (e.g. meets the regex, then the 'id' portion of the fullUrl SHALL end with the Resource.id. Note that the fullUrl is not the same as the canonical URL - it's an absolute url for an endpoint serving the resource (these will happen to have the same value on the canonical server for the resource with the canonical URL). Data type uri Conditions The cardinality or value of this element may be affected by these constraints: bdl-7, bdl-15, bdl-8 Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a
resource	Σ C	1..1	Observation	Element id Bundle.entry.resource Short description Measurements and simple assertions Alternate names Vital Signs, Measurement, Results, Tests Definition Measurements and simple assertions made about a patient, device or other subject. Comments 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. Data type Observation Conditions The cardinality or value of this element may be affected by these constraints: bdl-3a, bdl-3b, bdl-3c, bdl-7, bdl-11, bdl-12, bdl-13, bdl-5 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().ofType(canonical) \| %resource.descendants().ofType(uri) \| %resource.descendants().ofType(url))) or descendants().where(reference = '#').exists() or descendants().where(ofType(canonical) = '#').exists() or descendants().where(ofType(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.component.code is the same as Observation.code, then Observation.value SHALL NOT be present (the Observation.component.value[x] holds the value). `value.empty() or component.code.where(coding.intersect(%resource.code.coding).exists()).empty()` obs-8: bodyStructure SHALL only be present if Observation.bodySite is not present `bodySite.exists() implies bodyStructure.empty()` obs-6: dataAbsentReason SHALL only be present if Observation.value[x] is not present `dataAbsentReason.empty() or value.empty()` Mappings rim: n/a rim: Entity. Role, or Act rim: Entity, Role, or Act workflow: Event w5: clinical.diagnostics sct-concept: < 363787002 \|Observable entity\| v2: OBX rim: Observation[classCode=OBS, moodCode=EVN]
search	Σ C	0..0	BackboneElement	There are no (further) constraints on this element Element id Bundle.entry.search Short description Search related information Definition Information about the search process that lead to the creation of this entry. Data type BackboneElement Conditions The cardinality or value of this element may be affected by these constraints: bdl-2 Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a
request	Σ C	1..1	BackboneElement	There are no (further) constraints on this element Element id Bundle.entry.request Short description Additional execution information (transaction/batch/history) Definition Additional information about how this entry should be processed as part of a transaction or batch. For history, it shows how the entry was processed to create the version contained in the entry. Data type BackboneElement Conditions The cardinality or value of this element may be affected by these constraints: bdl-3a, bdl-3b, bdl-5 Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a
id		0..0	string	There are no (further) constraints on this element Element id Bundle.entry.request.id Short 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. Data type string Conditions The cardinality or value of this element may be affected by these constraints: ele-1 Mappings rim: n/a
extension	C	0..0	Extension	There are no (further) constraints on this element Element id Bundle.entry.request.extension Short 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 element. To make the use of extensions safe and managable, 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. Comments There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone. Data type Extension Slicing 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()` Mappings rim: n/a rim: N/A
modifierExtension	Σ ?! C	0..0	Extension	There are no (further) constraints on this element Element id Bundle.entry.request.modifierExtension Short description 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 managable, 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). Requirements Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions. Comments There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone. Data type 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()` Mappings rim: n/a rim: N/A
method	Σ C	1..1	codeBinding	There are no (further) constraints on this element Element id Bundle.entry.request.method Short description GET \| HEAD \| POST \| PUT \| DELETE \| PATCH Definition In a transaction or batch, this is the HTTP action to be executed for this entry. In a history bundle, this indicates the HTTP action that occurred. Comments Note that FHIR strings SHALL NOT exceed 1,048,576 (10241024) characters in size Data type* code Binding HTTP verbs (in the HTTP command line). See HTTP rfc for details. HTTPVerb (required) Conditions The cardinality or value of this element may be affected by these constraints: bdl-3b, bdl-3c, bdl-14, bdl-15 Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a
url	Σ	1..1	uri	There are no (further) constraints on this element Element id Bundle.entry.request.url Short description URL for HTTP equivalent of this entry Definition The URL for this entry, relative to the root (the address to which the request is posted). Comments E.g. for a Patient Create, the method would be "POST" and the URL would be "Patient". For a Patient Update, the method would be PUT and the URL would be "Patient/[id]". Data type uri Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a
ifNoneMatch	Σ	0..1	string	There are no (further) constraints on this element Element id Bundle.entry.request.ifNoneMatch Short description For managing cache validation Definition If the ETag values match, return a 304 Not Modified status. See the API documentation for "Conditional Read". Comments Note that FHIR strings SHALL NOT exceed 1,048,576 (10241024) characters in size Data type* string Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a
ifModifiedSince	Σ	0..1	instant	There are no (further) constraints on this element Element id Bundle.entry.request.ifModifiedSince Short description For managing cache currency Definition Only perform the operation if the last updated date matches. See the API documentation for "Conditional Read". Comments Note: This is intended for where precisely observed times are required, typically system logs etc., and not human-reported times - for them, see date and dateTime (which can be as precise as instant, but is not required to be) below. UTC offset is always required Data type instant Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a
ifMatch	Σ	0..1	string	There are no (further) constraints on this element Element id Bundle.entry.request.ifMatch Short description For managing update contention Definition Only perform the operation if the Etag value matches. For more information, see the API section "Managing Resource Contention". Comments Note that FHIR strings SHALL NOT exceed 1,048,576 (10241024) characters in size Data type* string Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a
ifNoneExist	Σ	0..1	string	There are no (further) constraints on this element Element id Bundle.entry.request.ifNoneExist Short description For conditional creates Definition Instruct the server not to perform the create if a specified resource already exists. For further information, see the API documentation for "Conditional Create". This is just the query portion of the URL - what follows the "?" (not including the "?"). Comments Note that FHIR strings SHALL NOT exceed 1,048,576 (10241024) characters in size Data type* string Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a
response	Σ C	0..0	BackboneElement	There are no (further) constraints on this element Element id Bundle.entry.response Short description Results of execution (transaction/batch/history) Definition Indicates the results of processing the corresponding 'request' entry in the batch or transaction being responded to or what the results of an operation where when returning history. Data type BackboneElement Conditions The cardinality or value of this element may be affected by these constraints: bdl-3a, bdl-3b, bdl-3d, bdl-5 Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a
signature	Σ	0..0	Signature	There are no (further) constraints on this element Element id Bundle.signature Short description Digital Signature Definition Digital Signature - base64 encoded. XML-DSig or a JWS. Requirements A Signature holds an electronic representation of a signature and its supporting context in a FHIR accessible form. The signature may either be a cryptographic type (XML DigSig or a JWS), which is able to provide non-repudiation proof, or it may be a graphical image that represents a signature or a signature process. This element allows capturing signatures on documents, messages, transactions or even search responses, to support content-authentication, non-repudiation or other business cases. This is primarily relevant where the bundle may travel through multiple hops or via other mechanisms where HTTPS non-repudiation is insufficient. Comments The signature could be created by the "author" of the bundle or by the originating device. Requirements around inclusion of a signature, verification of signatures and treatment of signed/non-signed bundles is implementation-environment specific. Data type Signature Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a rim: N/A
issues	Σ C	0..0	OperationOutcome	There are no (further) constraints on this element Element id Bundle.issues Short description Issues with the Bundle Definition Captures issues and warnings that relate to the construction of the Bundle and the content within it. Comments Usage notes: These issues and warnings must apply to the Bundle as a whole, not to individual entries.Messages relating to the processing of individual entries (e.g. in a batch or transaction) SHALL be reported in the entry.response.outcome for that entry. If there are errors that arise in the creation of the Bundle, then that should be handled by an OperationOutcome being returned instead of the Bundle. Data type OperationOutcome Conditions The cardinality or value of this element may be affected by these constraints: bdl-16, bdl-17 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().ofType(canonical) \| %resource.descendants().ofType(uri) \| %resource.descendants().ofType(url))) or descendants().where(reference = '#').exists() or descendants().where(ofType(canonical) = '#').exists() or descendants().where(ofType(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()` Mappings rim: n/a rim: Entity. Role, or Act rim: Entity, Role, or Act w5: infrastructure.exchange rim: Grouping is handled through multiple repetitions from whatever context references the outcomes (no specific grouper required)

Observation	C		Observation	There are no (further) constraints on this element Element id Observation Short description Measurements and simple assertions Alternate names Vital Signs, Measurement, Results, Tests Definition Measurements and simple assertions made about a patient, device or other subject. Comments 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. Data type 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().ofType(canonical) \| %resource.descendants().ofType(uri) \| %resource.descendants().ofType(url))) or descendants().where(reference = '#').exists() or descendants().where(ofType(canonical) = '#').exists() or descendants().where(ofType(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.component.code is the same as Observation.code, then Observation.value SHALL NOT be present (the Observation.component.value[x] holds the value). `value.empty() or component.code.where(coding.intersect(%resource.code.coding).exists()).empty()` obs-8: bodyStructure SHALL only be present if Observation.bodySite is not present `bodySite.exists() implies bodyStructure.empty()` obs-6: dataAbsentReason SHALL only be present if Observation.value[x] is not present `dataAbsentReason.empty() or value.empty()` Mappings rim: n/a rim: Entity. Role, or Act rim: Entity, Role, or Act workflow: Event w5: clinical.diagnostics sct-concept: < 363787002 \|Observable entity\| v2: OBX rim: Observation[classCode=OBS, moodCode=EVN]
id	Σ	0..1	id	There are no (further) constraints on this element Element id Observation.id Short 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. Comments Within the context of the FHIR RESTful interactions, the resource has an id except for cases like the create and conditional update. Otherwise, the use of the resouce id depends on the given use case. Data type id
meta	Σ	0..1	Meta	There are no (further) constraints on this element Element id Observation.meta Short 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. Data type Meta Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a rim: N/A
id		0..1	string	There are no (further) constraints on this element Element id Observation.meta.id Short 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. Data type string Conditions The cardinality or value of this element may be affected by these constraints: ele-1 Mappings rim: n/a
extension	C	0..*	Extension	There are no (further) constraints on this element Element id Observation.meta.extension Short 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 element. To make the use of extensions safe and managable, 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. Comments There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone. Data type Extension Slicing 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()` Mappings rim: n/a rim: N/A
versionId	Σ	0..1	id	There are no (further) constraints on this element Element id Observation.meta.versionId Short description 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. Comments 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. Data type id Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a
lastUpdated	Σ	0..1	instant	There are no (further) constraints on this element Element id Observation.meta.lastUpdated Short description When the resource version last changed Definition When the resource last changed - e.g. when the version changed. Comments This element is generally omitted in instances submitted in a PUT or POST. Instead, it is populated in the response instance and when retrieving information using a GET. 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. Data type instant Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a
source	Σ	0..1	uri	There are no (further) constraints on this element Element id Observation.meta.source Short 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. Comments The exact use of the source (and the possible implied Provenance.entity.role and agent.role) is left to implementer discretion. Only one nominated source is allowed; for additional provenance details, a full Provenance resource should be used. The source may correspond to Provenance.entity.what[x] or Provenance.agent.who[x], though it may be a more general or abstract reference. 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. Data type uri Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a
profile	Σ	0..1	canonical(StructureDefinition)	There are no (further) constraints on this element Element id Observation.meta.profile Short description Profiles this resource claims to conform to Definition A list of profiles (references to StructureDefinition resources) that this resource claims to conform to. The URL is a reference to StructureDefinition.url. 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. Data type canonical(StructureDefinition) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a
security	Σ C	0..*	CodingBinding	There are no (further) constraints on this element Element id Observation.meta.security Short description 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. Comments 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. Data type Coding Binding Security Labels from the Healthcare Privacy and Security Classification System. AllSecurityLabels (extensible) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` cod-1: A Coding SHOULD NOT have a display unless a code is also present. Computation on Coding.display alone is generally unsafe. Consider using CodeableConcept.text `code.exists().not() implies display.exists().not()` Mappings 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
tag	Σ C	0..*	Coding	There are no (further) constraints on this element Element id Observation.meta.tag Short 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. Comments 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. Data type Coding Binding Codes that represent various types of tags, commonly workflow-related; e.g. "Needs review by Dr. Jones". CommonTags (example) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` cod-1: A Coding SHOULD NOT have a display unless a code is also present. Computation on Coding.display alone is generally unsafe. Consider using CodeableConcept.text `code.exists().not() implies display.exists().not()` Mappings 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
implicitRules	Σ ?!	0..1	uri	There are no (further) constraints on this element Element id Observation.implicitRules Short description 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. Comments Asserting this rule set restricts the content to be only understood by a limited set of trading partners. This inherently limits the usefulness of the data in the long term. However, the existing health eco-system is highly fractured, and not yet ready to define, collect, and exchange data in a generally computable sense. Wherever possible, implementers and/or specification writers should avoid using this element. Often, when used, the URL is a reference to an implementation guide that defines these special rules as part of its narrative along with other profiles, value sets, etc. Data type uri Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a
language		0..1	codeBinding	There are no (further) constraints on this element Element id Observation.language Short description Language of the resource content Definition The base language in which the resource is written. Comments Language is provided to support indexing and accessibility (typically, services such as text to speech use the language tag). The html language tag in the narrative applies to the narrative. The language tag on the resource may be used to specify the language of other presentations generated from the data in the resource. Not all the content has to be in the base language. The Resource.language should not be assumed to apply to the narrative automatically. If a language is specified, it should it also be specified on the div element in the html (see rules in HTML5 for information about the relationship between xml:lang and the html lang attribute). Data type code Binding IETF language tag for a human language AllLanguages (required) Additional bindings CommonLanguages (starter) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a
text	C	0..1	Narrative	There are no (further) constraints on this element Element id Observation.text Short 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. Comments Contained resources do not have a 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. Data type Narrative Conditions The cardinality or value of this element may be affected by these constraints: dom-6 Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a rim: N/A rim: Act.text?
contained	C	0..*	Resource	There are no (further) constraints on this element Element id Observation.contained Short 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, nor can they have their own independent transaction scope. This is allowed to be a Parameters resource if and only if it is referenced by a resource that provides context/meaning. Comments This should never be done when the content can be identified properly, as once identification is lost, it is extremely difficult (and context dependent) to restore it again. Contained resources may have profiles and tags in their meta elements, but SHALL NOT have security labels. Data type Resource Conditions The cardinality or value of this element may be affected by these constraints: dom-2, dom-4, dom-3, dom-5 Mappings rim: n/a rim: Entity. Role, or Act rim: N/A
extension	C	0..*	Extension	There are no (further) constraints on this element Element id Observation.extension Short 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 managable, 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. Comments There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone. Data type Extension Slicing 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()` Mappings rim: n/a rim: N/A
modifierExtension	Σ ?! C	0..0	Extension	There are no (further) constraints on this element Element id Observation.modifierExtension Short description 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 managable, 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). Requirements Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions. Comments There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone. Data type Extension Slicing 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()` Mappings rim: n/a rim: N/A
identifier	Σ C	0..0	Identifier	There are no (further) constraints on this element Element id Observation.identifier Short description Business Identifier for observation Definition A unique identifier assigned to this observation. Requirements Allows observations to be distinguished and referenced. Comments The rules of the identifier.type determine if a check digit is part of the ID value or sent separately, such as through the checkDigit extension. Data type Identifier Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` ident-1: Identifier with no value has limited utility. If communicating that an identifier value has been suppressed or missing, the value element SHOULD be present with an extension indicating the missing semantic - e.g. data-absent-reason `value.exists()` Mappings 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 3) some other way to uniquely ID the OBR/ORC + OBX-3 + OBX-4. rim: id
instantiates[x]	Σ	0..0		There are no (further) constraints on this element Element id Observation.instantiates[x] Short description Instantiates FHIR ObservationDefinition Definition The reference to a FHIR ObservationDefinition resource that provides the definition that is adhered to in whole or in part by this Observation instance. Comments ObservationDefinition can be referenced by its canonical url using instantiatesCanonical, or by a name or an identifier using the appropriate sub-elements of instantiatesReference. Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a workflow: Event.instantiatesCanonical rim: .outboundRelationship[typeCode=DEFN].target
basedOn	Σ C	0..0	Reference(CarePlan \| DeviceRequest \| ImmunizationRecommendation \| MedicationRequest \| NutritionOrder \| ServiceRequest)	There are no (further) constraints on this element Element id Observation.basedOn Short 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. Requirements Allows tracing of authorization for the event and tracking whether proposals/recommendations were acted upon. Comments References SHALL be a reference to an actual FHIR resource, and SHALL be resolvable (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. Data type 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.exists() implies (reference.startsWith('#').not() or (reference.substring(1).trace('url') in %rootResource.contained.id.trace('ids')) or (reference='#' and %rootResource!=%resource))` ref-2: At least one of reference, identifier and display SHALL be present (unless an extension is provided). `reference.exists() or identifier.exists() or display.exists() or extension.exists()` Mappings 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]
triggeredBy		0..0	BackboneElement	There are no (further) constraints on this element Element id Observation.triggeredBy Short description Triggering observation(s) Definition Identifies the observation(s) that triggered the performance of this observation. Data type BackboneElement Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a v2: ORC rim: .inboundRelationship[typeCode=COMP].source[moodCode=EVN]
partOf	Σ C	0..0	Reference(GenomicStudy \| ImagingStudy \| Immunization \| MedicationAdministration \| MedicationDispense \| MedicationStatement \| Procedure)	There are no (further) constraints on this element Element id Observation.partOf Short 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. Comments To link an Observation to an Encounter use `encounter`. See the Notes below for guidance on referencing another Observation. Data type Reference(GenomicStudy \| ImagingStudy \| Immunization \| MedicationAdministration \| MedicationDispense \| MedicationStatement \| Procedure) 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.exists() implies (reference.startsWith('#').not() or (reference.substring(1).trace('url') in %rootResource.contained.id.trace('ids')) or (reference='#' and %rootResource!=%resource))` ref-2: At least one of reference, identifier and display SHALL be present (unless an extension is provided). `reference.exists() or identifier.exists() or display.exists() or extension.exists()` Mappings 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
status	Σ ?!	1..1	codeBinding	There are no (further) constraints on this element Element id Observation.status Short description registered \| preliminary \| final \| amended + Definition The status of the result value. Requirements Need to track the status of individual results. Some results are finalized before the whole report is finalized. Comments This element is labeled as a modifier because the status contains codes that mark the resource as not currently valid. Data type code Binding Codes providing the status of an observation. ObservationStatus (required) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings 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"
category		1..1	CodeableConceptBinding	Element id Observation.category Short description Concept - reference to a terminology or just text Definition A concept that may be defined by a formal reference to a terminology or ontology or may be provided by text. Requirements Used for filtering what observations are retrieved and displayed. Comments 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. Data type CodeableConcept Binding Codes for high level observation categories. ObservationCategoryCodes (preferred) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings 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
code	Σ C	1..1	CodeableConcept	Element id Observation.code Short description Concept - reference to a terminology or just text Alternate names Name Definition A concept that may be defined by a formal reference to a terminology or ontology or may be provided by text. Requirements Knowing what kind of observation is being made is essential to understanding the observation. Comments 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. Data type CodeableConcept Binding Codes identifying names of simple observations. LOINCCodes (example) Conditions The cardinality or value of this element may be affected by these constraints: obs-7 Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings 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..0	string	There are no (further) constraints on this element Element id Observation.code.id Short 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. Data type string Conditions The cardinality or value of this element may be affected by these constraints: ele-1 Mappings rim: n/a
extension	C	0..0	Extension	There are no (further) constraints on this element Element id Observation.code.extension Short 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 element. To make the use of extensions safe and managable, 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. Comments There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone. Data type Extension Slicing 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()` Mappings rim: n/a rim: N/A
coding	Σ C	1..*	Coding	There are no (further) constraints on this element Element id Observation.code.coding Short description Code defined by a terminology system Definition A reference to a code defined by a terminology system. Requirements Allows for alternative encodings within a code system, and translations to other code systems. Comments 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. Data type Coding Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` cod-1: A Coding SHOULD NOT have a display unless a code is also present. Computation on Coding.display alone is generally unsafe. Consider using CodeableConcept.text `code.exists().not() implies display.exists().not()` Mappings 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: CE.1-8, CE.10-22 rim: union(., ./translation) orim: fhir:CodeableConcept.coding rdfs:subPropertyOf dt:CD.coding
id		0..0	string	There are no (further) constraints on this element Element id Observation.code.coding.id Short 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. Data type string Conditions The cardinality or value of this element may be affected by these constraints: ele-1 Mappings rim: n/a
extension	C	0..0	Extension	There are no (further) constraints on this element Element id Observation.code.coding.extension Short 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 element. To make the use of extensions safe and managable, 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. Comments There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone. Data type Extension Slicing 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()` Mappings rim: n/a rim: N/A
system	Σ	1..1	uri	There are no (further) constraints on this element Element id Observation.code.coding.system Short description Identity of the terminology system Definition The identification of the code system that defines the meaning of the symbol in the code. Requirements Need to be unambiguous about the source of the definition of the symbol. Comments 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 be an absolute reference to some definition that establishes the system clearly and unambiguously. Data type uri Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a v2: CE.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 id Observation.code.coding.version Short description 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. Comments 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. Data type string Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a v2: CE.7 rim:* ./codeSystemVersion orim: fhir:Coding.version rdfs:subPropertyOf dt:CDCoding.codeSystemVersion
code	Σ C	1..1	code	There are no (further) constraints on this element Element id Observation.code.coding.code Short description 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). Requirements Need to refer to a particular code in the system. Comments Note that FHIR strings SHALL NOT exceed 1,048,576 (10241024) characters in size Data type* code Conditions The cardinality or value of this element may be affected by these constraints: cod-1 Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a v2: CE.1 rim:* ./code orim: fhir:Coding.code rdfs:subPropertyOf dt:CDCoding.code
display	Σ C	1..1	string	There are no (further) constraints on this element Element id Observation.code.coding.display Short description Representation defined by the system Definition A representation of the meaning of the code in the system, following the rules of the system. Requirements Need to be able to carry a human-readable meaning of the code for readers that do not know the system. Comments Note that FHIR strings SHALL NOT exceed 1,048,576 (10241024) characters in size Data type* string Conditions The cardinality or value of this element may be affected by these constraints: cod-1 Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a v2: CE.2 - but note this is not well followed rim:* CV.displayName orim: fhir:Coding.display rdfs:subPropertyOf dt:CDCoding.displayName
userSelected	Σ	0..0	boolean	There are no (further) constraints on this element Element id Observation.code.coding.userSelected Short description 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). Requirements 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. Comments 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. Data type boolean Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings 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..0	string	There are no (further) constraints on this element Element id Observation.code.text Short 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. Requirements 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. Comments Very often the text is the same as a displayName of one of the codings. Data type string Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a v2: CE.9. But note many systems use CE.2 for this rim: ./originalText[mediaType/code="text/plain"]/data orim: fhir:CodeableConcept.text rdfs:subPropertyOf dt:CD.originalText
subject	Σ C	1..1	Reference(Patient)	Element id Observation.subject Short description A reference from one resource to another Definition A reference from one resource to another. Requirements Observations have no value if you don't know who or what they're about. Comments References SHALL be a reference to an actual FHIR resource, and SHALL be resolvable (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. Data type Reference(Patient) 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.exists() implies (reference.startsWith('#').not() or (reference.substring(1).trace('url') in %rootResource.contained.id.trace('ids')) or (reference='#' and %rootResource!=%resource))` ref-2: At least one of reference, identifier and display SHALL be present (unless an extension is provided). `reference.exists() or identifier.exists() or display.exists() or extension.exists()` Mappings 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]
focus	Σ C	0..0	Reference(Resource)	There are no (further) constraints on this element Element id Observation.focus Short 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. Comments 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 http://hl7.org/fhir/StructureDefinition/observation-focusCode. Data type 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.exists() implies (reference.startsWith('#').not() or (reference.substring(1).trace('url') in %rootResource.contained.id.trace('ids')) or (reference='#' and %rootResource!=%resource))` ref-2: At least one of reference, identifier and display SHALL be present (unless an extension is provided). `reference.exists() or identifier.exists() or display.exists() or extension.exists()` Mappings 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]
encounter	Σ C	0..0	Reference(Encounter)	There are no (further) constraints on this element Element id Observation.encounter Short 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. Requirements For some observations it may be important to know the link between an observation and a particular encounter. Comments 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). Data type 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.exists() implies (reference.startsWith('#').not() or (reference.substring(1).trace('url') in %rootResource.contained.id.trace('ids')) or (reference='#' and %rootResource!=%resource))` ref-2: At least one of reference, identifier and display SHALL be present (unless an extension is provided). `reference.exists() or identifier.exists() or display.exists() or extension.exists()` Mappings rim: n/a rim: The target of a resource reference is a RIM entry point (Act, Role, or Entity) workflow: Event.encounter w5: FiveWs.context v2: PV1 rim: inboundRelationship[typeCode=COMP].source[classCode=ENC, moodCode=EVN]
effective[x]	Σ	1..1		There are no (further) constraints on this element Element id Observation.effective[x] Short description Clinically relevant time/time-period for observation Alternate names Occurrence Definition The time or time-period the observed value is asserted as being true. For biological subjects - e.g. human patients - this is usually called the "physiologically relevant time". This is usually either the time of the procedure or of specimen collection, but very often the source of the date/time is not known, only the date/time itself. Requirements Knowing when an observation was deemed true is important to its relevance as well as determining trends. Comments 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. Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings 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	Data type dateTime
issued	Σ	0..0	instant	There are no (further) constraints on this element Element id Observation.issued Short description Date/Time this version was made available Definition The date and time this version of the observation was made available to providers, typically after the results have been reviewed and verified. Comments For Observations that don't require review and verification, it may be the same as the `lastUpdated` time of the resource itself. For Observations that do require review and verification for certain updates, it might not be the same as the `lastUpdated` time of the resource itself due to a non-clinically significant update that doesn't require the new version to be reviewed and verified again. Data type instant Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings 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 C	0..*	Reference(Organization)	Element id Observation.performer Short description A reference from one resource to another Definition A reference from one resource to another. Requirements May give a degree of confidence in the observation and also indicates where follow-up questions should be directed. Comments References SHALL be a reference to an actual FHIR resource, and SHALL be resolvable (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. Data type 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.exists() implies (reference.startsWith('#').not() or (reference.substring(1).trace('url') in %rootResource.contained.id.trace('ids')) or (reference='#' and %rootResource!=%resource))` ref-2: At least one of reference, identifier and display SHALL be present (unless an extension is provided). `reference.exists() or identifier.exists() or display.exists() or extension.exists()` Mappings 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..0	string	There are no (further) constraints on this element Element id Observation.performer.id Short 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. Data type string Conditions The cardinality or value of this element may be affected by these constraints: ele-1 Mappings rim: n/a
extension	C	0..0	Extension	There are no (further) constraints on this element Element id Observation.performer.extension Short 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 element. To make the use of extensions safe and managable, 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. Comments There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone. Data type Extension Slicing 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()` Mappings rim: n/a rim: N/A
reference	Σ C	0..0	string	There are no (further) constraints on this element Element id Observation.performer.reference Short description 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. Comments 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. Data type string Conditions The cardinality or value of this element may be affected by these constraints: ref-2, ref-1 Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a rim: N/A
type	Σ	1..1	uriBindingFixed Value	There are no (further) constraints on this element Element id Observation.performer.type Short description Type the reference refers to (e.g. "Patient") - must be a resource in resources 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). Comments 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 known RESTful URL) or by resolving the target of the reference. Data type uri Binding Aa resource (or, for logical models, the URI of the logical model). ResourceType (extensible) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Fixed value Organization Mappings rim: n/a rim: N/A
identifier	Σ C	1..1	Identifier	There are no (further) constraints on this element Element id Observation.performer.identifier Short description An identifier intended for computation Definition An identifier - identifies some entity uniquely and unambiguously. Typically this is used for business identifiers. Comments The rules of the identifier.type determine if a check digit is part of the ID value or sent separately, such as through the checkDigit extension. Data type Identifier Conditions The cardinality or value of this element may be affected by these constraints: ref-2 Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` ident-1: Identifier with no value has limited utility. If communicating that an identifier value has been suppressed or missing, the value element SHOULD be present with an extension indicating the missing semantic - e.g. data-absent-reason `value.exists()` Mappings 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..0	string	There are no (further) constraints on this element Element id Observation.performer.identifier.id Short 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. Data type string Conditions The cardinality or value of this element may be affected by these constraints: ele-1 Mappings rim: n/a
extension	C	0..0	Extension	There are no (further) constraints on this element Element id Observation.performer.identifier.extension Short 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 element. To make the use of extensions safe and managable, 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. Comments There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone. Data type Extension Slicing 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()` Mappings rim: n/a rim: N/A
use	Σ ?!	0..0	codeBinding	There are no (further) constraints on this element Element id Observation.performer.identifier.use Short description usual \| official \| temp \| secondary \| old (If known) Definition The purpose of this identifier. Requirements Allows the appropriate identifier for a particular context of use to be selected from among a set of identifiers. Comments Applications can assume that an identifier is permanent unless it explicitly says that it is temporary. Data type code Binding Identifies the purpose for this identifier, if known . IdentifierUse (required) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a v2: N/A rim: Role.code or implied by context
type	Σ	0..0	CodeableConceptBinding	There are no (further) constraints on this element Element id Observation.performer.identifier.type Short description Description of identifier Definition A coded type for the identifier that can be used to determine which identifier to use for a specific purpose. Requirements Allows users to make use of identifiers when the identifier system is not known. Comments This element deals only with general categories of identifiers. It SHOULD not be used for codes that correspond 1..1 with the Identifier.system. Some identifiers may fall into multiple categories due to common usage. Where the system is known, a type is unnecessary because the type is always part of the system definition. However systems often need to handle identifiers where the system is not known. There is not a 1:1 relationship between type and system, since many different systems have the same type. Data type CodeableConcept Binding A coded type for an identifier that can be used to determine which identifier to use for a specific purpose. IdentifierTypeCodes (extensible) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings 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	1..1	uriFixed Value	There are no (further) constraints on this element Element id Observation.performer.identifier.system Short description The namespace for the identifier value Definition Establishes the namespace for the value - that is, an absolute URL that describes a set values that are unique. Requirements There are many sets of identifiers. To perform matching of two identifiers, we need to know what set we're dealing with. The system identifies a particular set of unique identifiers. Comments Identifier.system is always case sensitive. Data type uri Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Fixed value https://fhir.synapxe.sg/NamingSystem/hci-code Examples General http://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 C	1..1	string	There are no (further) constraints on this element Element id Observation.performer.identifier.value Short description 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. Comments If the value is a full URI, then the system SHALL be urn:ietf:rfc:3986. The value's primary purpose is computational mapping. As a result, it may be normalized for comparison purposes (e.g. removing non-significant whitespace, dashes, etc.) A value formatted for human display can be conveyed using the http://hl7.org/fhir/StructureDefinition/rendered-value). 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. Data type string Conditions The cardinality or value of this element may be affected by these constraints: ident-1 Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Examples General 123456 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 C	0..0	Period	There are no (further) constraints on this element Element id Observation.performer.identifier.period Short description Time period when id is/was valid for use Definition Time period during which identifier is/was valid for use. Comments 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. Data type 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 or equal value than end `start.hasValue().not() or end.hasValue().not() or (start.lowBoundary() <= end.highBoundary())` Mappings 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 C	0..0	Reference(Organization)	There are no (further) constraints on this element Element id Observation.performer.identifier.assigner Short description Organization that issued id (may be just text) Definition Organization that issued/manages the identifier. Comments The Identifier.assigner may omit the .reference element and only contain a .display element reflecting the name or other textual information about the assigning organization. Data type 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.exists() implies (reference.startsWith('#').not() or (reference.substring(1).trace('url') in %rootResource.contained.id.trace('ids')) or (reference='#' and %rootResource!=%resource))` ref-2: At least one of reference, identifier and display SHALL be present (unless an extension is provided). `reference.exists() or identifier.exists() or display.exists() or extension.exists()` Mappings 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 C	1..1	string	There are no (further) constraints on this element Element id Observation.performer.display Short description Text alternative for the resource Definition Plain text narrative that identifies the resource in addition to the resource reference. Comments 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. Data type string Conditions The cardinality or value of this element may be affected by these constraints: ref-2 Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a rim: N/A
value[x]	Σ C	0..1		There are no (further) constraints on this element Element id Observation.value[x] Short description Actual result Definition The information determined as a result of making the observation, if the information has a simple value. Requirements An observation exists to have a value, though it might not if it is in error, or if it represents a group of observations. Comments An observation may have: a single value here both a value and a set of related or component values only a set of related or component values. If a value is present, the datatype for this element should be determined by the `code`. CodeableConcept with just a text would be used instead of a string if the field was usually coded, or if the type associated with the `code` defines a coded value. Attachment is used if the observation result value is a binary file such as an image. If the observation result value is derived from the binary file (for example 'X' detected and here is the the proof in this image), the binary file may be directly represented using DocumentReference and referenced by `derivedFrom`. The usage of valueReference is restricted to the MolecularSequence resource when used as a definitional resource, not as a patient-specific finding. . For additional guidance, see the Notes section below. Conditions The cardinality or value of this element may be affected by these constraints: obs-7, obs-6 Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a sct-concept: < 441742003 \|Evaluation finding\| v2: OBX-2, OBX-5, OBX-6 rim: value sct-attr: 363714003 \|Interprets\|
valueCodeableConcept			CodeableConcept	Data type CodeableConcept
valueQuantity			Quantity	Data type Quantity
valueString			string	Data type string
dataAbsentReason	C	0..0	CodeableConceptBinding	There are no (further) constraints on this element Element id Observation.dataAbsentReason Short description Why the result is missing Definition Provides a reason why the expected value in the element Observation.value[x] is missing. Requirements For many results it is necessary to handle exceptional values in measurements. Comments 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. Data type CodeableConcept Binding Codes specifying why the result (`Observation.value[x]`) is missing. DataAbsentReason (extensible) Conditions The cardinality or value of this element may be affected by these constraints: obs-6 Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a v2: CE/CNE/CWE rim: CD orim: fhir:CodeableConcept rdfs:subClassOf dt:CD v2: N/A rim: value.nullFlavor
interpretation		0..0	CodeableConceptBinding	There are no (further) constraints on this element Element id Observation.interpretation Short description High, low, normal, etc Alternate names Abnormal Flag Definition A categorical assessment of an observation value. For example, high, low, normal. Requirements For some results, particularly numeric results, an interpretation is necessary to fully understand the significance of a result. Comments Historically used for laboratory results (known as 'abnormal flag' ), its use extends to other use cases where coded interpretations are relevant. Often reported as one or more simple compact codes this element is often placed adjacent to the result value in reports and flow sheets to signal the meaning/normalcy status of the result. Data type CodeableConcept Binding Codes identifying interpretations of observations. ObservationInterpretationCodes (extensible) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings 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\|
note		0..0	Annotation	There are no (further) constraints on this element Element id Observation.note Short description Comments about the observation Definition Comments about the observation or the results. Requirements Need to be able to provide free text additional information. Comments 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. Data type Annotation Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings 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
bodySite	C	0..0	CodeableConcept	There are no (further) constraints on this element Element id Observation.bodySite Short description Observed body part Definition Indicates the site on the subject's body where the observation was made (i.e. the target site). Comments 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. Data type CodeableConcept Binding SNOMED CT Body site concepts SNOMEDCTBodyStructures (example) Conditions The cardinality or value of this element may be affected by these constraints: obs-8 Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings 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\|
bodyStructure	C	0..0	Reference(BodyStructure)	There are no (further) constraints on this element Element id Observation.bodyStructure Short description Observed body structure Definition Indicates the body structure on the subject's body where the observation was made (i.e. the target site). Comments Only used if not implicit in code found in Observation.code or bodySite is used. In many systems, this may be represented as a related observation instead of an inline component. Data type Reference(BodyStructure) Conditions The cardinality or value of this element may be affected by these constraints: obs-8 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.exists() implies (reference.startsWith('#').not() or (reference.substring(1).trace('url') in %rootResource.contained.id.trace('ids')) or (reference='#' and %rootResource!=%resource))` ref-2: At least one of reference, identifier and display SHALL be present (unless an extension is provided). `reference.exists() or identifier.exists() or display.exists() or extension.exists()` Mappings rim: n/a rim: The target of a resource reference is a RIM entry point (Act, Role, or Entity) rim: targetSiteCode
method		0..0	CodeableConcept	There are no (further) constraints on this element Element id Observation.method Short description How it was done Definition Indicates the mechanism used to perform the observation. Requirements In some cases, method can impact results and is thus used for determining whether results can be compared or determining significance of results. Comments Only used if not implicit in code for Observation.code. Data type CodeableConcept Binding Methods for simple observations. ObservationMethods (example) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a v2: CE/CNE/CWE rim: CD orim: fhir:CodeableConcept rdfs:subClassOf dt:CD v2: OBX-17 rim: methodCode
specimen	C	0..0	Reference(Specimen)	Element id Observation.specimen Short description Specimen used for this observation Definition The specimen that was used when this observation was made. Comments 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). Data type 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.exists() implies (reference.startsWith('#').not() or (reference.substring(1).trace('url') in %rootResource.contained.id.trace('ids')) or (reference='#' and %rootResource!=%resource))` ref-2: At least one of reference, identifier and display SHALL be present (unless an extension is provided). `reference.exists() or identifier.exists() or display.exists() or extension.exists()` obs-9: If Observation.specimen is a reference to Group, the group can only have specimens `(reference.resolve().exists() and reference.resolve() is Group) implies reference.resolve().member.entity.resolve().all($this is Specimen)` Mappings 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	C	0..0	Reference(Device)	Element id Observation.device Short description A reference to the device that generates the measurements or the device settings for the device Definition A reference to the device that generates the measurements or the device settings for the device. Comments 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. Data type Reference(Device) 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.exists() implies (reference.startsWith('#').not() or (reference.substring(1).trace('url') in %rootResource.contained.id.trace('ids')) or (reference='#' and %rootResource!=%resource))` ref-2: At least one of reference, identifier and display SHALL be present (unless an extension is provided). `reference.exists() or identifier.exists() or display.exists() or extension.exists()` Mappings 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	C	0..0	BackboneElement	There are no (further) constraints on this element Element id Observation.referenceRange Short description 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. Requirements 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. Comments 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. Data type 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()` Mappings rim: n/a v2: OBX-7 rim: outboundRelationship[typeCode=REFV]/target[classCode=OBS, moodCode=EVN]
hasMember	Σ C	0..0	Reference(MolecularSequence \| Observation \| QuestionnaireResponse)	There are no (further) constraints on this element Element id Observation.hasMember Short description Related resource that belongs to the Observation group Definition This observation is a group observation (e.g. a battery, a panel of tests, a set of vital sign measurements) that includes the target as a member of the group. Comments 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. Data type Reference(MolecularSequence \| Observation \| QuestionnaireResponse) 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.exists() implies (reference.startsWith('#').not() or (reference.substring(1).trace('url') in %rootResource.contained.id.trace('ids')) or (reference='#' and %rootResource!=%resource))` ref-2: At least one of reference, identifier and display SHALL be present (unless an extension is provided). `reference.exists() or identifier.exists() or display.exists() or extension.exists()` Mappings 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
derivedFrom	Σ C	0..0	Reference(DocumentReference \| GenomicStudy \| ImagingSelection \| ImagingStudy \| MolecularSequence \| Observation \| QuestionnaireResponse)	There are no (further) constraints on this element Element id Observation.derivedFrom Short description Related resource from which the observation is made 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. Comments 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. Data type Reference(DocumentReference \| GenomicStudy \| ImagingSelection \| ImagingStudy \| MolecularSequence \| Observation \| QuestionnaireResponse) 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.exists() implies (reference.startsWith('#').not() or (reference.substring(1).trace('url') in %rootResource.contained.id.trace('ids')) or (reference='#' and %rootResource!=%resource))` ref-2: At least one of reference, identifier and display SHALL be present (unless an extension is provided). `reference.exists() or identifier.exists() or display.exists() or extension.exists()` Mappings 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
component	Σ C	0..*	BackboneElement	There are no (further) constraints on this element Element id Observation.component Short description Component results Definition Some observations have multiple component observations. These component observations are expressed as separate code value pairs that share the same attributes. Examples include systolic and diastolic component observations for blood pressure measurement and multiple component observations for genetics observations. Requirements 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. Comments For a discussion on the ways Observations can be assembled in groups together see Notes below. Data type BackboneElement Conditions The cardinality or value of this element may be affected by these constraints: obs-7 Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a v2: containment by OBX-4? rim: outBoundRelationship[typeCode=COMP]
id		0..0	string	There are no (further) constraints on this element Element id Observation.component.id Short 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. Data type string Conditions The cardinality or value of this element may be affected by these constraints: ele-1 Mappings rim: n/a
extension	C	0..0	Extension	There are no (further) constraints on this element Element id Observation.component.extension Short 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 element. To make the use of extensions safe and managable, 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. Comments There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone. Data type Extension Slicing 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()` Mappings rim: n/a rim: N/A
modifierExtension	Σ ?! C	0..0	Extension	There are no (further) constraints on this element Element id Observation.component.modifierExtension Short description 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 managable, 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). Requirements Modifier extensions allow for extensions that cannot be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the definition of modifier extensions. Comments There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone. Data type 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()` Mappings rim: n/a rim: N/A
code	Σ C	1..1	CodeableConcept	Element id Observation.component.code Short description Concept - reference to a terminology or just text Definition A concept that may be defined by a formal reference to a terminology or ontology or may be provided by text. Requirements Knowing what kind of observation is being made is essential to understanding the observation. Comments 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. Data type CodeableConcept Binding Codes identifying names of simple observations. LOINCCodes (example) Conditions The cardinality or value of this element may be affected by these constraints: obs-7 Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a v2: CE/CNE/CWE rim: CD orim: fhir:CodeableConcept rdfs:subClassOf dt:CD w5: FiveWs.what[x] sct-concept: < 363787002 \|Observable entity\| OR < 386053000 \|Evaluation procedure\| v2: OBX-3 rim: code
id		0..0	string	There are no (further) constraints on this element Element id Observation.component.code.id Short 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. Data type string Conditions The cardinality or value of this element may be affected by these constraints: ele-1 Mappings rim: n/a
extension	C	0..0	Extension	There are no (further) constraints on this element Element id Observation.component.code.extension Short 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 element. To make the use of extensions safe and managable, 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. Comments There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone. Data type Extension Slicing 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()` Mappings rim: n/a rim: N/A
coding	Σ C	1..*	Coding	There are no (further) constraints on this element Element id Observation.component.code.coding Short description Code defined by a terminology system Definition A reference to a code defined by a terminology system. Requirements Allows for alternative encodings within a code system, and translations to other code systems. Comments 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. Data type Coding Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` cod-1: A Coding SHOULD NOT have a display unless a code is also present. Computation on Coding.display alone is generally unsafe. Consider using CodeableConcept.text `code.exists().not() implies display.exists().not()` Mappings 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: CE.1-8, CE.10-22 rim: union(., ./translation) orim: fhir:CodeableConcept.coding rdfs:subPropertyOf dt:CD.coding
id		0..0	string	There are no (further) constraints on this element Element id Observation.component.code.coding.id Short 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. Data type string Conditions The cardinality or value of this element may be affected by these constraints: ele-1 Mappings rim: n/a
extension	C	0..0	Extension	There are no (further) constraints on this element Element id Observation.component.code.coding.extension Short 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 element. To make the use of extensions safe and managable, 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. Comments There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone. Data type Extension Slicing 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()` Mappings rim: n/a rim: N/A
system	Σ	1..1	uri	There are no (further) constraints on this element Element id Observation.component.code.coding.system Short description Identity of the terminology system Definition The identification of the code system that defines the meaning of the symbol in the code. Requirements Need to be unambiguous about the source of the definition of the symbol. Comments 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 be an absolute reference to some definition that establishes the system clearly and unambiguously. Data type uri Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a v2: CE.3 rim:* ./codeSystem orim: fhir:Coding.system rdfs:subPropertyOf dt:CDCoding.codeSystem
version	Σ	0..0	string	There are no (further) constraints on this element Element id Observation.component.code.coding.version Short description 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. Comments 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. Data type string Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a v2: CE.7 rim:* ./codeSystemVersion orim: fhir:Coding.version rdfs:subPropertyOf dt:CDCoding.codeSystemVersion
code	Σ C	1..1	code	There are no (further) constraints on this element Element id Observation.component.code.coding.code Short description 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). Requirements Need to refer to a particular code in the system. Comments Note that FHIR strings SHALL NOT exceed 1,048,576 (10241024) characters in size Data type* code Conditions The cardinality or value of this element may be affected by these constraints: cod-1 Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a v2: CE.1 rim:* ./code orim: fhir:Coding.code rdfs:subPropertyOf dt:CDCoding.code
display	Σ C	1..1	string	There are no (further) constraints on this element Element id Observation.component.code.coding.display Short description Representation defined by the system Definition A representation of the meaning of the code in the system, following the rules of the system. Requirements Need to be able to carry a human-readable meaning of the code for readers that do not know the system. Comments Note that FHIR strings SHALL NOT exceed 1,048,576 (10241024) characters in size Data type* string Conditions The cardinality or value of this element may be affected by these constraints: cod-1 Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a v2: CE.2 - but note this is not well followed rim:* CV.displayName orim: fhir:Coding.display rdfs:subPropertyOf dt:CDCoding.displayName
userSelected	Σ	0..0	boolean	There are no (further) constraints on this element Element id Observation.component.code.coding.userSelected Short description 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). Requirements 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. Comments 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. Data type boolean Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings 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..0	string	There are no (further) constraints on this element Element id Observation.component.code.text Short 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. Requirements 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. Comments Very often the text is the same as a displayName of one of the codings. Data type string Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a v2: CE.9. But note many systems use CE.2 for this rim: ./originalText[mediaType/code="text/plain"]/data orim: fhir:CodeableConcept.text rdfs:subPropertyOf dt:CD.originalText
value[x]	Σ	1..1		There are no (further) constraints on this element Element id Observation.component.value[x] Short description Actual component result Definition The information determined as a result of making the observation, if the information has a simple value. Requirements An observation exists to have a value, though it might not if it is in error, or if it represents a group of observations. Comments Used when observation has a set of component observations: An observation may have both a value (e.g. an Apgar score) and component observations (the observations from which the Apgar score was derived). If a value is present, the datatype for this element should be determined by the `code`. CodeableConcept with just a text would be used instead of a string if the field was usually coded, or if the type associated with the `code` defines a coded value. Attachment is used if the observation result value is a binary file such as an image. If the observation result value is derived from the binary file (for example 'X' detected and here is the the proof in this image), the binary file may be directly represented using DocumentReference and referenced by `derivedFrom`. If a value is present, the datatype for this element should be determined by the `code`. CodeableConcept with just a text would be used instead of a string if the field was usually coded, or if the type associated with the `code` defines a coded value. Attachment is used if the observation result value is a binary file such as an image. If the observation result value is derived from the binary file (for example 'X' detected and here is the the proof in this image), the binary file may be directly represented using DocumentReference and referenced by `derivedFrom`. The usage of valueReference is restricted to the MolecularSequence resource when used as a definitional resource, not as a patient-specific finding. . For additional guidance, see the Notes section below. Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a sct-concept: 363714003 \|Interprets\| < 441742003 \|Evaluation finding\| v2: OBX-2, OBX-5, OBX-6 rim: value sct-attr: 363714003 \|Interprets\|
valueAttachment			Attachment	There are no (further) constraints on this element Data type Attachment
valueBoolean			boolean	There are no (further) constraints on this element Data type boolean
valueCodeableConcept			CodeableConcept	There are no (further) constraints on this element Data type CodeableConcept
valueDateTime			dateTime	There are no (further) constraints on this element Data type dateTime
valueInteger			integer	There are no (further) constraints on this element Data type integer
valuePeriod			Period	There are no (further) constraints on this element Data type Period
valueQuantity			Quantity	There are no (further) constraints on this element Data type Quantity
valueRange			Range	There are no (further) constraints on this element Data type Range
valueRatio			Ratio	There are no (further) constraints on this element Data type Ratio
valueReference			Reference(MolecularSequence)	There are no (further) constraints on this element Data type Reference(MolecularSequence)
valueSampledData			SampledData	There are no (further) constraints on this element Data type SampledData
valueString			string	There are no (further) constraints on this element Data type string
valueTime			time	There are no (further) constraints on this element Data type time
dataAbsentReason		0..0	CodeableConceptBinding	There are no (further) constraints on this element Element id Observation.component.dataAbsentReason Short description Why the component result is missing Definition Provides a reason why the expected value in the element Observation.component.value[x] is missing. Requirements For many results it is necessary to handle exceptional values in measurements. Comments "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 "test not done". 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. Because of these options, use-case agreements are required to interpret general observations for exceptional values. Data type CodeableConcept Binding Codes specifying why the result (`Observation.value[x]`) is missing. DataAbsentReason (extensible) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a v2: CE/CNE/CWE rim: CD orim: fhir:CodeableConcept rdfs:subClassOf dt:CD v2: N/A rim: value.nullFlavor
interpretation		0..0	CodeableConceptBinding	There are no (further) constraints on this element Element id Observation.component.interpretation Short description High, low, normal, etc Alternate names Abnormal Flag Definition A categorical assessment of an observation value. For example, high, low, normal. Requirements For some results, particularly numeric results, an interpretation is necessary to fully understand the significance of a result. Comments Historically used for laboratory results (known as 'abnormal flag' ), its use extends to other use cases where coded interpretations are relevant. Often reported as one or more simple compact codes this element is often placed adjacent to the result value in reports and flow sheets to signal the meaning/normalcy status of the result. Data type CodeableConcept Binding Codes identifying interpretations of observations. ObservationInterpretationCodes (extensible) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings 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\|
referenceRange		0..0	see (referenceRange)	There are no (further) constraints on this element Element id Observation.component.referenceRange Short description Provides guide for interpretation of component result Definition Guidance on how to interpret the value by comparison to a normal or recommended range. Requirements 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. Comments 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. Mappings v2: OBX-7 rim: outboundRelationship[typeCode=REFV]/target[classCode=OBS, moodCode=EVN]

Terminologies

Path	Binding Strength	Value Set (Code System)	Description
Bundle.language	required	http://hl7.org/fhir/ValueSet/all-languages\|5.0.0	IETF language tag for a human language
Bundle.identifier.use	required	http://hl7.org/fhir/ValueSet/identifier-use\|5.0.0	Identifies the purpose for this identifier, if known .
Bundle.identifier.type	extensible	http://hl7.org/fhir/ValueSet/identifier-type	A coded type for an identifier that can be used to determine which identifier to use for a specific purpose.
Bundle.type	required	http://hl7.org/fhir/ValueSet/bundle-type\|5.0.0	Indicates the purpose of a bundle - how it is intended to be used.
Bundle.link.relation	required	http://hl7.org/fhir/ValueSet/iana-link-relations\|5.0.0
Bundle.entry.search.mode	required	http://hl7.org/fhir/ValueSet/search-entry-mode\|5.0.0	Why an entry is in the result set - whether it's included as a match or because of an _include requirement, or to convey information or warning information about the search process.
Bundle.entry.request.method	required	http://hl7.org/fhir/ValueSet/http-verb\|5.0.0	HTTP verbs (in the HTTP command line). See HTTP rfc for details.
Observation.meta.security	extensible	http://hl7.org/fhir/ValueSet/security-labels	Security Labels from the Healthcare Privacy and Security Classification System.
Observation.meta.tag	example	http://hl7.org/fhir/ValueSet/common-tags	Codes that represent various types of tags, commonly workflow-related; e.g. "Needs review by Dr. Jones".
Observation.language	required	http://hl7.org/fhir/ValueSet/all-languages\|5.0.0	IETF language tag for a human language
Observation.triggeredBy.type	required	http://hl7.org/fhir/ValueSet/observation-triggeredbytype\|5.0.0	The type of TriggeredBy Observation.
Observation.status	required	http://hl7.org/fhir/ValueSet/observation-status\|5.0.0	Codes providing the status of an observation.
Observation.category	preferred	http://hl7.org/fhir/ValueSet/observation-category	Codes for high level observation categories.
Observation.code	example	http://hl7.org/fhir/ValueSet/observation-codes	Codes identifying names of simple observations.
Observation.performer.type	extensible	http://hl7.org/fhir/ValueSet/resource-types	Aa resource (or, for logical models, the URI of the logical model).
Observation.component.code	example	http://hl7.org/fhir/ValueSet/observation-codes	Codes identifying names of simple observations.