This page is part of the Point-of-care Device FHIR IG (v0.1.0: STU 1 Draft) based on FHIR R3. . For a full list of available versions, see the Directory of published versions 
Compound Numeric Observation Profile
Canonical URL
http://devices.fhir.org/StructureDefinition/CompoundNumericObservation
Profile Definition
| Name | Flags | Card. | Type | |
|---|---|---|---|---|
| Observation | 0..* | 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. 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 lab reports, etc.
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| extension | 0..* | 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. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. 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. Unordered, Open, by url(Value) Constraints
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| modifierExtension | ?! | 0..* | Extension | 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. Usually modifier elements provide negation or qualification. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions. 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. Unordered, Open, by url(Value) Constraints
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| identifier | Σ | 0..* | Identifier | Short description: Business Identifier for observation Definition:A unique identifier assigned to this observation. Allows observations to be distinguished and referenced.
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| extension | 0..* | 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. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. 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. Unordered, Open, by url(Value) Constraints
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| use | Σ ?! | 0..1 | codeBinding | Short description: usual | official | temp | secondary (If known) Definition:The purpose of this identifier. Allows the appropriate identifier for a particular context of use to be selected from among a set of identifiers. This is labeled as "Is Modifier" because applications should not mistake a temporary id for a permanent one. Applications can assume that an identifier is permanent unless it explicitly says that it is temporary.
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| type | Σ | 0..1 | CodeableConceptBinding | 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. Allows users to make use of identifiers when the identifier system is not known. This element deals only with general categories of identifiers. It SHOULD not be used for codes that correspond 1..1 with the Identifier.system. Some identifiers may fall into multiple categories due to common usage. Where the system is known, a type is unnecessary because the type is always part of the system definition. However systems often need to handle identifiers where the system is not known. There is not a 1:1 relationship between type and system, since many different systems have the same type.
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| extension | 0..* | 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. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. 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. Unordered, Open, by url(Value) Constraints
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| coding | Σ | 0..* | Coding | Short description: Code defined by a terminology system Definition:A reference to a code defined by a terminology system. Allows for translations and alternate encodings within a code system. Also supports communication of the same instance to systems requiring different encodings. 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.
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| extension | 0..* | 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. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. 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. Unordered, Open, by url(Value) Constraints
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| system | Σ | 0..1 | uri | Short description: Identity of the terminology system Definition:The identification of the code system that defines the meaning of the symbol in the code. Need to be unambiguous about the source of the definition of the symbol. The URI may be an OID (urn:oid:...) or a UUID (urn:uuid:...). OIDs and UUIDs SHALL be references to the HL7 OID registry. Otherwise, the URI should come from HL7's list of FHIR defined special URIs or it should de-reference to some definition that establish the system clearly and unambiguously.
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| version | Σ | 0..1 | string | 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. 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.
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| code | Σ | 0..1 | 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). Need to refer to a particular code in the system. Note that FHIR strings may not exceed 1MB in size
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| display | Σ | 0..1 | string | 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. Need to be able to carry a human-readable meaning of the code for readers that do not know the system. Note that FHIR strings may not exceed 1MB in size
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| userSelected | Σ | 0..1 | boolean | Short description: If this coding was chosen directly by the user Definition:Indicates that this coding was chosen by a user directly - i.e. off a pick list of available items (codes or displays). This has been identified as a clinical safety criterium - that this exact system/code pair was chosen explicitly, rather than inferred by the system based on some rules or language processing. Amongst a set of alternatives, a directly chosen code is the most appropriate starting point for new translations. There is some ambiguity about what exactly 'directly chosen' implies, and trading partner agreement may be needed to clarify the use of this element and its consequences more completely.
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| text | Σ | 0..1 | string | 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. The codes from the terminologies do not always capture the correct meaning with all the nuances of the human using them, or sometimes there is no appropriate code at all. In these cases, the text is used to capture the full meaning of the source. Very often the text is the same as a displayName of one of the codings.
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| system | Σ | 0..1 | uri | Short description: The namespace for the identifier value Definition:Establishes the namespace for the value - that is, a URL that describes a set values that are unique. There are many sets of identifiers. To perform matching of two identifiers, we need to know what set we're dealing with. The system identifies a particular set of unique identifiers. see http://en.wikipedia.org/wiki/Uniform_resource_identifier
General Mappingshttp://www.acme.com/identifiers/patient or urn:ietf:rfc:3986 if the Identifier.value itself is a full uri
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| value | Σ | 0..1 | string | 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. If the value is a full URI, then the system SHALL be urn:ietf:rfc:3986. The value's primary purpose is computational mapping. As a result, it may be normalized for comparison purposes (e.g. removing non-significant whitespace, dashes, etc.) A value formatted for human display can be conveyed using the Rendered Value extension.
General Mappings123456
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| period | Σ | 0..1 | Period | Short description: Time period when id is/was valid for use Definition:Time period during which identifier is/was valid for use. This is not a duration - that's a measure of time (a separate type), but a duration that occurs at a fixed value of time. 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"). If duration is required, specify the type as Interval|Duration.
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| extension | 0..* | 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. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. 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. Unordered, Open, by url(Value) Constraints
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| start | Σ | 0..1 | dateTime | Short description: Starting time with inclusive boundary Definition:The start of the period. The boundary is inclusive. If the low element is missing, the meaning is that the low boundary is not known.
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| end | Σ | 0..1 | dateTime | Short description: End time with inclusive boundary, if not ongoing Definition:The end of the period. If the end of the period is missing, it means that the period is ongoing. The start may be in the past, and the end date in the future, which means that period is expected/planned to end at that time. The high value includes any matching date/time. i.e. 2012-02-03T10:00:00 is in a period that has a end value of 2012-02-03.
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| assigner | Σ | 0..1 | Reference(Organization) | Short description: Organization that issued id (may be just text) Definition:Organization that issued/manages the identifier. The Identifier.assigner may omit the .reference element and only contain a .display element reflecting the name or other textual information about the assigning organization.
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| extension | 0..* | 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. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. 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. Unordered, Open, by url(Value) Constraints
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| reference | Σ | 0..1 | string | 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. 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.
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| identifier | Σ | 0..1 | Identifier | Short description: Logical reference, when literal reference is not known Definition:An identifier for the other resource. This is used when there is no way to reference the other resource directly, either because the entity is not available through a FHIR server, or because there is no way for the author of the resource to convert a known identifier to an actual location. There is no requirement that a Reference.identifier point to something that is actually exposed as a FHIR instance, but it SHALL point to a business concept that would be expected to be exposed as a FHIR instance, and that instance would need to be of a FHIR resource type allowed by the reference. When an identifier is provided in place of a reference, any system processing the reference will only be able to resolve the identifier to a reference if it understands the business context in which the identifier is used. Sometimes this is global (e.g. a national identifier) but often it is not. For this reason, none of the useful mechanisms described for working with references (e.g. chaining, includes) are possible, nor should servers be expected to be able resolve the reference. Servers may accept an identifier based reference untouched, resolve it, and/or reject it - see CapabilityStatement.rest.resource.referencePolicy. When both an identifier and a literal reference are provided, the literal reference is preferred. Applications processing the resource are allowed - but not required - to check that the identifier matches the literal reference Applications converting a logical reference to a literal reference may choose to leave the logical reference present, or remove it.
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| display | Σ | 0..1 | string | Short description: Text alternative for the resource Definition:Plain text narrative that identifies the resource in addition to the resource reference. This is generally not the same as the Resource.text of the referenced resource. The purpose is to identify what's being referenced, not to fully describe it.
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| basedOn | Σ | 0..* | Reference(CarePlan | DeviceRequest | ImmunizationRecommendation | MedicationRequest | NutritionOrder | ProcedureRequest | ReferralRequest) | 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. Allows tracing of authorization for the event and tracking whether proposals/recommendations were acted upon. References SHALL be a reference to an actual FHIR resource, and SHALL be resolveable (allowing for access control, temporary unavailability, etc). Resolution can be either by retrieval from the URL, or, where applicable by resource type, by treating an absolute reference as a canonical URL and looking it up in a local registry/repository. Reference(CarePlan | DeviceRequest | ImmunizationRecommendation | MedicationRequest | NutritionOrder | ProcedureRequest | ReferralRequest) Constraints
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| extension | 0..* | 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. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. 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. Unordered, Open, by url(Value) Constraints
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| reference | Σ | 0..1 | string | 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. 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.
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| identifier | Σ | 0..1 | Identifier | Short description: Logical reference, when literal reference is not known Definition:An identifier for the other resource. This is used when there is no way to reference the other resource directly, either because the entity is not available through a FHIR server, or because there is no way for the author of the resource to convert a known identifier to an actual location. There is no requirement that a Reference.identifier point to something that is actually exposed as a FHIR instance, but it SHALL point to a business concept that would be expected to be exposed as a FHIR instance, and that instance would need to be of a FHIR resource type allowed by the reference. When an identifier is provided in place of a reference, any system processing the reference will only be able to resolve the identifier to a reference if it understands the business context in which the identifier is used. Sometimes this is global (e.g. a national identifier) but often it is not. For this reason, none of the useful mechanisms described for working with references (e.g. chaining, includes) are possible, nor should servers be expected to be able resolve the reference. Servers may accept an identifier based reference untouched, resolve it, and/or reject it - see CapabilityStatement.rest.resource.referencePolicy. When both an identifier and a literal reference are provided, the literal reference is preferred. Applications processing the resource are allowed - but not required - to check that the identifier matches the literal reference Applications converting a logical reference to a literal reference may choose to leave the logical reference present, or remove it.
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| display | Σ | 0..1 | string | Short description: Text alternative for the resource Definition:Plain text narrative that identifies the resource in addition to the resource reference. This is generally not the same as the Resource.text of the referenced resource. The purpose is to identify what's being referenced, not to fully describe it.
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| status | Σ ?! | 1..1 | codeBinding | Short description: registered | preliminary | final | amended + Definition:The status of the result value. Need to track the status of individual results. Some results are finalized before the whole report is finalized. This element is labeled as a modifier because the status contains codes that mark the resource as not currently valid.
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| category | 0..* | CodeableConceptBinding | Short description: Classification of type of observation Definition:A code that classifies the general type of observation being made. Used for filtering what observations are retrieved and displayed. In addition to the required category valueset, this element allows various categorization schemes based on the owner’s definition of the category and effectively multiple categories can be used at once. The level of granularity is defined by the category concepts in the value set. observation-category (preferred) Constraints
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| extension | 0..* | 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. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. 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. Unordered, Open, by url(Value) Constraints
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| coding | Σ | 0..* | Coding | Short description: Code defined by a terminology system Definition:A reference to a code defined by a terminology system. Allows for translations and alternate encodings within a code system. Also supports communication of the same instance to systems requiring different encodings. 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.
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| extension | 0..* | 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. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. 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. Unordered, Open, by url(Value) Constraints
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| system | Σ | 0..1 | uri | Short description: Identity of the terminology system Definition:The identification of the code system that defines the meaning of the symbol in the code. Need to be unambiguous about the source of the definition of the symbol. The URI may be an OID (urn:oid:...) or a UUID (urn:uuid:...). OIDs and UUIDs SHALL be references to the HL7 OID registry. Otherwise, the URI should come from HL7's list of FHIR defined special URIs or it should de-reference to some definition that establish the system clearly and unambiguously.
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| version | Σ | 0..1 | string | 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. 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.
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| code | Σ | 0..1 | 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). Need to refer to a particular code in the system. Note that FHIR strings may not exceed 1MB in size
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| display | Σ | 0..1 | string | 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. Need to be able to carry a human-readable meaning of the code for readers that do not know the system. Note that FHIR strings may not exceed 1MB in size
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| userSelected | Σ | 0..1 | boolean | Short description: If this coding was chosen directly by the user Definition:Indicates that this coding was chosen by a user directly - i.e. off a pick list of available items (codes or displays). This has been identified as a clinical safety criterium - that this exact system/code pair was chosen explicitly, rather than inferred by the system based on some rules or language processing. Amongst a set of alternatives, a directly chosen code is the most appropriate starting point for new translations. There is some ambiguity about what exactly 'directly chosen' implies, and trading partner agreement may be needed to clarify the use of this element and its consequences more completely.
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| text | Σ | 0..1 | string | 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. The codes from the terminologies do not always capture the correct meaning with all the nuances of the human using them, or sometimes there is no appropriate code at all. In these cases, the text is used to capture the full meaning of the source. Very often the text is the same as a displayName of one of the codings.
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| code | Σ | 1..1 | CodeableConcept | Short description: Base numeric type Alternate names:Name Definition:Observation.code shall have a coding from the ISO/IEEE 11073 MDC metrics nomenclature. The Rosetta Terminology Mapping Management System (RTMMS) lists available codes. Depending on the type of measurement, the Vital Signs profiles may require an additional LOINC code. Knowing what kind of observation is being made is essential to understanding the observation. 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.
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| extension | 0..* | 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. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. 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. Unordered, Open, by url(Value) Constraints
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| coding | Σ | 1..* | Coding | Short description: Code defined by a terminology system Definition:A reference to a code defined by a terminology system. Allows for translations and alternate encodings within a code system. Also supports communication of the same instance to systems requiring different encodings. 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. Unordered, Open, by system(Value) Constraints
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| extension | 0..* | 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. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. 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. Unordered, Open, by url(Value) Constraints
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| system | Σ | 0..1 | uri | Short description: Identity of the terminology system Definition:The identification of the code system that defines the meaning of the symbol in the code. Need to be unambiguous about the source of the definition of the symbol. The URI may be an OID (urn:oid:...) or a UUID (urn:uuid:...). OIDs and UUIDs SHALL be references to the HL7 OID registry. Otherwise, the URI should come from HL7's list of FHIR defined special URIs or it should de-reference to some definition that establish the system clearly and unambiguously.
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| version | Σ | 0..1 | string | 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. 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.
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| code | Σ | 0..1 | 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). Need to refer to a particular code in the system. Note that FHIR strings may not exceed 1MB in size
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| display | Σ | 0..1 | string | 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. Need to be able to carry a human-readable meaning of the code for readers that do not know the system. Note that FHIR strings may not exceed 1MB in size
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| userSelected | Σ | 0..1 | boolean | Short description: If this coding was chosen directly by the user Definition:Indicates that this coding was chosen by a user directly - i.e. off a pick list of available items (codes or displays). This has been identified as a clinical safety criterium - that this exact system/code pair was chosen explicitly, rather than inferred by the system based on some rules or language processing. Amongst a set of alternatives, a directly chosen code is the most appropriate starting point for new translations. There is some ambiguity about what exactly 'directly chosen' implies, and trading partner agreement may be needed to clarify the use of this element and its consequences more completely.
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| 11073MDC | Σ | 1..1 | Coding | Short description: 11073 MDC code Definition:Code defined by the ISO/IEEE 11073-10101 Nomenclature Allows for translations and alternate encodings within a code system. Also supports communication of the same instance to systems requiring different encodings. 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.
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| extension | 0..* | 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. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. 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. Unordered, Open, by url(Value) Constraints
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| system | Σ | 1..1 | uriFixed Value | Short description: Identity of the terminology system Definition:The identification of the code system that defines the meaning of the symbol in the code. Need to be unambiguous about the source of the definition of the symbol. The URI may be an OID (urn:oid:...) or a UUID (urn:uuid:...). OIDs and UUIDs SHALL be references to the HL7 OID registry. Otherwise, the URI should come from HL7's list of FHIR defined special URIs or it should de-reference to some definition that establish the system clearly and unambiguously.
urn:iso:std:iso:11073:10101
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| version | Σ | 0..1 | string | 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. 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.
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| code | Σ | 1..1 | 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). Need to refer to a particular code in the system. Note that FHIR strings may not exceed 1MB in size
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| display | Σ | 0..1 | string | 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. Need to be able to carry a human-readable meaning of the code for readers that do not know the system. Note that FHIR strings may not exceed 1MB in size
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| userSelected | Σ | 0..1 | boolean | Short description: If this coding was chosen directly by the user Definition:Indicates that this coding was chosen by a user directly - i.e. off a pick list of available items (codes or displays). This has been identified as a clinical safety criterium - that this exact system/code pair was chosen explicitly, rather than inferred by the system based on some rules or language processing. Amongst a set of alternatives, a directly chosen code is the most appropriate starting point for new translations. There is some ambiguity about what exactly 'directly chosen' implies, and trading partner agreement may be needed to clarify the use of this element and its consequences more completely.
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| text | Σ | 0..1 | string | 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. The codes from the terminologies do not always capture the correct meaning with all the nuances of the human using them, or sometimes there is no appropriate code at all. In these cases, the text is used to capture the full meaning of the source. Very often the text is the same as a displayName of one of the codings.
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| subject | Σ | 1..1 | Reference(Patient | PoC Device Profile) | Short description: Who and/or what this is about Definition:Observation.subject shall be present and refer to a Patient resource or PoC Device resource. Observations have no value if you don't know who or what they're about. One would expect this element to be a cardinality of 1..1. The only circumstance in which the subject can be missing is when the observation is made by a device that does not know the patient. In this case, the observation SHALL be matched to a patient through some context/channel matching technique, and at this point, the observation should be updated. If the target of the observation is different than the subject, the general extension observation-focal-subject. may be used. However, the distinction between the patient's own value for an observation versus that of the fetus, or the donor or blood product unit, etc., are often specified in the observation code. Reference(Patient | PoC Device Profile) Constraints
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| extension | 0..* | 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. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. 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. Unordered, Open, by url(Value) Constraints
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| reference | Σ | 0..1 | string | 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. 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.
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| identifier | Σ | 0..1 | Identifier | Short description: Logical reference, when literal reference is not known Definition:An identifier for the other resource. This is used when there is no way to reference the other resource directly, either because the entity is not available through a FHIR server, or because there is no way for the author of the resource to convert a known identifier to an actual location. There is no requirement that a Reference.identifier point to something that is actually exposed as a FHIR instance, but it SHALL point to a business concept that would be expected to be exposed as a FHIR instance, and that instance would need to be of a FHIR resource type allowed by the reference. When an identifier is provided in place of a reference, any system processing the reference will only be able to resolve the identifier to a reference if it understands the business context in which the identifier is used. Sometimes this is global (e.g. a national identifier) but often it is not. For this reason, none of the useful mechanisms described for working with references (e.g. chaining, includes) are possible, nor should servers be expected to be able resolve the reference. Servers may accept an identifier based reference untouched, resolve it, and/or reject it - see CapabilityStatement.rest.resource.referencePolicy. When both an identifier and a literal reference are provided, the literal reference is preferred. Applications processing the resource are allowed - but not required - to check that the identifier matches the literal reference Applications converting a logical reference to a literal reference may choose to leave the logical reference present, or remove it.
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| display | Σ | 0..1 | string | Short description: Text alternative for the resource Definition:Plain text narrative that identifies the resource in addition to the resource reference. This is generally not the same as the Resource.text of the referenced resource. The purpose is to identify what's being referenced, not to fully describe it.
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| context | 0..1 | Reference(Encounter | EpisodeOfCare) | Short description: Healthcare event during which this observation is made Alternate names:Encounter Definition:The healthcare event (e.g. a patient and healthcare provider interaction) during which this observation is made. For some observations it may be important to know the link between an observation and a particular encounter. This will typically be the encounter the event occurred within, but some events may be initiated prior to or after the official completion of an encounter or episode but still be tied to the context of the encounter or episode (e.g. pre-admission lab tests). Reference(Encounter | EpisodeOfCare) Constraints
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| extension | 0..* | 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. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. 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. Unordered, Open, by url(Value) Constraints
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| reference | Σ | 0..1 | string | 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. 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.
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| identifier | Σ | 0..1 | Identifier | Short description: Logical reference, when literal reference is not known Definition:An identifier for the other resource. This is used when there is no way to reference the other resource directly, either because the entity is not available through a FHIR server, or because there is no way for the author of the resource to convert a known identifier to an actual location. There is no requirement that a Reference.identifier point to something that is actually exposed as a FHIR instance, but it SHALL point to a business concept that would be expected to be exposed as a FHIR instance, and that instance would need to be of a FHIR resource type allowed by the reference. When an identifier is provided in place of a reference, any system processing the reference will only be able to resolve the identifier to a reference if it understands the business context in which the identifier is used. Sometimes this is global (e.g. a national identifier) but often it is not. For this reason, none of the useful mechanisms described for working with references (e.g. chaining, includes) are possible, nor should servers be expected to be able resolve the reference. Servers may accept an identifier based reference untouched, resolve it, and/or reject it - see CapabilityStatement.rest.resource.referencePolicy. When both an identifier and a literal reference are provided, the literal reference is preferred. Applications processing the resource are allowed - but not required - to check that the identifier matches the literal reference Applications converting a logical reference to a literal reference may choose to leave the logical reference present, or remove it.
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| display | Σ | 0..1 | string | Short description: Text alternative for the resource Definition:Plain text narrative that identifies the resource in addition to the resource reference. This is generally not the same as the Resource.text of the referenced resource. The purpose is to identify what's being referenced, not to fully describe it.
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| effective[x] | Σ | 0..1 | 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. Knowing when an observation was deemed true is important to its relevance as well as determining trends. At least a date should be present unless this observation is a historical report.
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| effectivedateTime | dateTime | Data Type | ||
| effectivePeriod | Period | Data Type | ||
| issued | Σ | 0..1 | instant | Short description: Date/Time this was made available Definition:The date and time this observation was made available to providers, typically after the results have been reviewed and verified. Updated when the result is updated.
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| performer | Σ | 0..* | Reference(Practitioner | Organization | Patient | RelatedPerson) | Short description: Who is responsible for the observation Definition:Who was responsible for asserting the observed value as "true". May give a degree of confidence in the observation and also indicates where follow-up questions should be directed. References SHALL be a reference to an actual FHIR resource, and SHALL be resolveable (allowing for access control, temporary unavailability, etc). Resolution can be either by retrieval from the URL, or, where applicable by resource type, by treating an absolute reference as a canonical URL and looking it up in a local registry/repository. Reference(Practitioner | Organization | Patient | RelatedPerson) Constraints
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| extension | 0..* | 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. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. 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. Unordered, Open, by url(Value) Constraints
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| reference | Σ | 0..1 | string | 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. 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.
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| identifier | Σ | 0..1 | Identifier | Short description: Logical reference, when literal reference is not known Definition:An identifier for the other resource. This is used when there is no way to reference the other resource directly, either because the entity is not available through a FHIR server, or because there is no way for the author of the resource to convert a known identifier to an actual location. There is no requirement that a Reference.identifier point to something that is actually exposed as a FHIR instance, but it SHALL point to a business concept that would be expected to be exposed as a FHIR instance, and that instance would need to be of a FHIR resource type allowed by the reference. When an identifier is provided in place of a reference, any system processing the reference will only be able to resolve the identifier to a reference if it understands the business context in which the identifier is used. Sometimes this is global (e.g. a national identifier) but often it is not. For this reason, none of the useful mechanisms described for working with references (e.g. chaining, includes) are possible, nor should servers be expected to be able resolve the reference. Servers may accept an identifier based reference untouched, resolve it, and/or reject it - see CapabilityStatement.rest.resource.referencePolicy. When both an identifier and a literal reference are provided, the literal reference is preferred. Applications processing the resource are allowed - but not required - to check that the identifier matches the literal reference Applications converting a logical reference to a literal reference may choose to leave the logical reference present, or remove it.
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| display | Σ | 0..1 | string | Short description: Text alternative for the resource Definition:Plain text narrative that identifies the resource in addition to the resource reference. This is generally not the same as the Resource.text of the referenced resource. The purpose is to identify what's being referenced, not to fully describe it.
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| value[x] | Σ | 0..0 | Short description: Actual result Definition:The information determined as a result of making the observation, if the information has a simple value. An observation exists to have a value, though it may not if it is in error, or if it represents a group of observations. Normally, an observation will have either a single value or a set of related observations. A few observations (e.g. Apgar score) may have both a value and related observations (for an Apgar score, the observations from which the measure is derived). If a value is present, the datatype for this element should be determined by Observation.code. This element has a variable name depending on the type as follows: valueQuantity, valueCodeableConcept, valueString, valueBoolean, valueRange, valueRatio, valueSampledData, valueAttachment, valueTime, valueDateTime, or valuePeriod. (The name format is "'value' + the type name" with a capital on the first letter of the type). If the data element is usually coded or if the type associated with the Observation.value defines a coded value, use CodeableConcept instead of string datatype even if the value is uncoded text. A value set is bound to the ValueCodeableConcept element. For further discussion and examples see the notes section below.
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| dataAbsentReason | 0..1 | CodeableConceptBinding | Short description: Why the result is missing Definition:Provides a reason why the expected value in the element Observation.value[x] is missing. For many results it is necessary to handle exceptional values in measurements. Null or exceptional values can be represented two ways in FHIR Observations. One way is to simply include them in the value set and represent the exceptions in the value. For example, measurement values for a serology test could be "detected", "not detected", "inconclusive", or "specimen unsatisfactory". The alternate way is to use the value element for actual observations and use the explicit dataAbsentReason element to record exceptional values. For example, the dataAbsentReason code "error" could be used when the measurement was not completed. Note that an observation may only be reported if there are values to report. For example differential cell counts values may be reported only when > 0. Because of these options, use-case agreements are required to interpret general observations for null or exceptional values. observation-valueabsentreason (extensible) Constraints
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| extension | 0..* | 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. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. 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. Unordered, Open, by url(Value) Constraints
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| coding | Σ | 0..* | Coding | Short description: Code defined by a terminology system Definition:A reference to a code defined by a terminology system. Allows for translations and alternate encodings within a code system. Also supports communication of the same instance to systems requiring different encodings. 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.
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| extension | 0..* | 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. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. 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. Unordered, Open, by url(Value) Constraints
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| system | Σ | 0..1 | uri | Short description: Identity of the terminology system Definition:The identification of the code system that defines the meaning of the symbol in the code. Need to be unambiguous about the source of the definition of the symbol. The URI may be an OID (urn:oid:...) or a UUID (urn:uuid:...). OIDs and UUIDs SHALL be references to the HL7 OID registry. Otherwise, the URI should come from HL7's list of FHIR defined special URIs or it should de-reference to some definition that establish the system clearly and unambiguously.
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| version | Σ | 0..1 | string | 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. 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.
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| code | Σ | 0..1 | 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). Need to refer to a particular code in the system. Note that FHIR strings may not exceed 1MB in size
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| display | Σ | 0..1 | string | 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. Need to be able to carry a human-readable meaning of the code for readers that do not know the system. Note that FHIR strings may not exceed 1MB in size
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| userSelected | Σ | 0..1 | boolean | Short description: If this coding was chosen directly by the user Definition:Indicates that this coding was chosen by a user directly - i.e. off a pick list of available items (codes or displays). This has been identified as a clinical safety criterium - that this exact system/code pair was chosen explicitly, rather than inferred by the system based on some rules or language processing. Amongst a set of alternatives, a directly chosen code is the most appropriate starting point for new translations. There is some ambiguity about what exactly 'directly chosen' implies, and trading partner agreement may be needed to clarify the use of this element and its consequences more completely.
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| text | Σ | 0..1 | string | 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. The codes from the terminologies do not always capture the correct meaning with all the nuances of the human using them, or sometimes there is no appropriate code at all. In these cases, the text is used to capture the full meaning of the source. Very often the text is the same as a displayName of one of the codings.
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| interpretation | 0..1 | CodeableConceptBinding | Short description: High, low, normal, etc. Alternate names:Abnormal Flag Definition:The assessment made based on the result of the observation. Intended as a simple compact code often placed adjacent to the result value in reports and flow sheets to signal the meaning/normalcy status of the result. Otherwise known as abnormal flag. For some results, particularly numeric results, an interpretation is necessary to fully understand the significance of a result. Not all terminology uses fit this general pattern. In some cases, models should not use CodeableConcept and use Coding directly and provide their own structure for managing text, codings, translations and the relationship between elements and pre- and post-coordination. observation-interpretation (extensible) Constraints
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| extension | 0..* | 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. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. 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. Unordered, Open, by url(Value) Constraints
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| coding | Σ | 0..* | Coding | Short description: Code defined by a terminology system Definition:A reference to a code defined by a terminology system. Allows for translations and alternate encodings within a code system. Also supports communication of the same instance to systems requiring different encodings. 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.
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| extension | 0..* | 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. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. 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. Unordered, Open, by url(Value) Constraints
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| system | Σ | 0..1 | uri | Short description: Identity of the terminology system Definition:The identification of the code system that defines the meaning of the symbol in the code. Need to be unambiguous about the source of the definition of the symbol. The URI may be an OID (urn:oid:...) or a UUID (urn:uuid:...). OIDs and UUIDs SHALL be references to the HL7 OID registry. Otherwise, the URI should come from HL7's list of FHIR defined special URIs or it should de-reference to some definition that establish the system clearly and unambiguously.
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| version | Σ | 0..1 | string | 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. 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.
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| code | Σ | 0..1 | 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). Need to refer to a particular code in the system. Note that FHIR strings may not exceed 1MB in size
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| display | Σ | 0..1 | string | 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. Need to be able to carry a human-readable meaning of the code for readers that do not know the system. Note that FHIR strings may not exceed 1MB in size
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| userSelected | Σ | 0..1 | boolean | Short description: If this coding was chosen directly by the user Definition:Indicates that this coding was chosen by a user directly - i.e. off a pick list of available items (codes or displays). This has been identified as a clinical safety criterium - that this exact system/code pair was chosen explicitly, rather than inferred by the system based on some rules or language processing. Amongst a set of alternatives, a directly chosen code is the most appropriate starting point for new translations. There is some ambiguity about what exactly 'directly chosen' implies, and trading partner agreement may be needed to clarify the use of this element and its consequences more completely.
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| text | Σ | 0..1 | string | 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. The codes from the terminologies do not always capture the correct meaning with all the nuances of the human using them, or sometimes there is no appropriate code at all. In these cases, the text is used to capture the full meaning of the source. Very often the text is the same as a displayName of one of the codings.
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| comment | 0..1 | string | Short description: Comments about result Definition:May include statements about significant, unexpected or unreliable values, or information about the source of the value where this may be relevant to the interpretation of the result. Need to be able to provide free text additional information. Note that FHIR strings may not exceed 1MB in size
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| bodySite | 0..1 | CodeableConcept | Short description: Observed body part Definition:Indicates the site on the subject's body where the observation was made (i.e. the target site). Only used if not implicit in code found in Observation.code. In many systems, this may be represented as a related observation instead of an inline component. If the use case requires BodySite to be handled as a separate resource (e.g. to identify and track separately) then use the standard extension body-site-instance.
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| extension | 0..* | 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. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. 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. Unordered, Open, by url(Value) Constraints
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| coding | Σ | 0..* | Coding | Short description: Code defined by a terminology system Definition:A reference to a code defined by a terminology system. Allows for translations and alternate encodings within a code system. Also supports communication of the same instance to systems requiring different encodings. 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.
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| extension | 0..* | 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. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. 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. Unordered, Open, by url(Value) Constraints
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| system | Σ | 0..1 | uri | Short description: Identity of the terminology system Definition:The identification of the code system that defines the meaning of the symbol in the code. Need to be unambiguous about the source of the definition of the symbol. The URI may be an OID (urn:oid:...) or a UUID (urn:uuid:...). OIDs and UUIDs SHALL be references to the HL7 OID registry. Otherwise, the URI should come from HL7's list of FHIR defined special URIs or it should de-reference to some definition that establish the system clearly and unambiguously.
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| version | Σ | 0..1 | string | 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. 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.
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| code | Σ | 0..1 | 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). Need to refer to a particular code in the system. Note that FHIR strings may not exceed 1MB in size
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| display | Σ | 0..1 | string | 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. Need to be able to carry a human-readable meaning of the code for readers that do not know the system. Note that FHIR strings may not exceed 1MB in size
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| userSelected | Σ | 0..1 | boolean | Short description: If this coding was chosen directly by the user Definition:Indicates that this coding was chosen by a user directly - i.e. off a pick list of available items (codes or displays). This has been identified as a clinical safety criterium - that this exact system/code pair was chosen explicitly, rather than inferred by the system based on some rules or language processing. Amongst a set of alternatives, a directly chosen code is the most appropriate starting point for new translations. There is some ambiguity about what exactly 'directly chosen' implies, and trading partner agreement may be needed to clarify the use of this element and its consequences more completely.
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| text | Σ | 0..1 | string | 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. The codes from the terminologies do not always capture the correct meaning with all the nuances of the human using them, or sometimes there is no appropriate code at all. In these cases, the text is used to capture the full meaning of the source. Very often the text is the same as a displayName of one of the codings.
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| method | 0..1 | CodeableConcept | Short description: How it was done Definition:Indicates the mechanism used to perform the observation. In some cases, method can impact results and is thus used for determining whether results can be compared or determining significance of results. Only used if not implicit in code for Observation.code.
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| extension | 0..* | 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. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. 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. Unordered, Open, by url(Value) Constraints
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| coding | Σ | 0..* | Coding | Short description: Code defined by a terminology system Definition:A reference to a code defined by a terminology system. Allows for translations and alternate encodings within a code system. Also supports communication of the same instance to systems requiring different encodings. 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.
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| extension | 0..* | 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. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. 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. Unordered, Open, by url(Value) Constraints
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| system | Σ | 0..1 | uri | Short description: Identity of the terminology system Definition:The identification of the code system that defines the meaning of the symbol in the code. Need to be unambiguous about the source of the definition of the symbol. The URI may be an OID (urn:oid:...) or a UUID (urn:uuid:...). OIDs and UUIDs SHALL be references to the HL7 OID registry. Otherwise, the URI should come from HL7's list of FHIR defined special URIs or it should de-reference to some definition that establish the system clearly and unambiguously.
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| version | Σ | 0..1 | string | 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. 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.
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| code | Σ | 0..1 | 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). Need to refer to a particular code in the system. Note that FHIR strings may not exceed 1MB in size
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| display | Σ | 0..1 | string | 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. Need to be able to carry a human-readable meaning of the code for readers that do not know the system. Note that FHIR strings may not exceed 1MB in size
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| userSelected | Σ | 0..1 | boolean | Short description: If this coding was chosen directly by the user Definition:Indicates that this coding was chosen by a user directly - i.e. off a pick list of available items (codes or displays). This has been identified as a clinical safety criterium - that this exact system/code pair was chosen explicitly, rather than inferred by the system based on some rules or language processing. Amongst a set of alternatives, a directly chosen code is the most appropriate starting point for new translations. There is some ambiguity about what exactly 'directly chosen' implies, and trading partner agreement may be needed to clarify the use of this element and its consequences more completely.
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| text | Σ | 0..1 | string | 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. The codes from the terminologies do not always capture the correct meaning with all the nuances of the human using them, or sometimes there is no appropriate code at all. In these cases, the text is used to capture the full meaning of the source. Very often the text is the same as a displayName of one of the codings.
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| specimen | 0..1 | Reference(Specimen) | Short description: Specimen used for this observation Definition:The specimen that was used when this observation was made. Should only be used if not implicit in code found in
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| extension | 0..* | 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. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. 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. Unordered, Open, by url(Value) Constraints
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| reference | Σ | 0..1 | string | 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. 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.
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| identifier | Σ | 0..1 | Identifier | Short description: Logical reference, when literal reference is not known Definition:An identifier for the other resource. This is used when there is no way to reference the other resource directly, either because the entity is not available through a FHIR server, or because there is no way for the author of the resource to convert a known identifier to an actual location. There is no requirement that a Reference.identifier point to something that is actually exposed as a FHIR instance, but it SHALL point to a business concept that would be expected to be exposed as a FHIR instance, and that instance would need to be of a FHIR resource type allowed by the reference. When an identifier is provided in place of a reference, any system processing the reference will only be able to resolve the identifier to a reference if it understands the business context in which the identifier is used. Sometimes this is global (e.g. a national identifier) but often it is not. For this reason, none of the useful mechanisms described for working with references (e.g. chaining, includes) are possible, nor should servers be expected to be able resolve the reference. Servers may accept an identifier based reference untouched, resolve it, and/or reject it - see CapabilityStatement.rest.resource.referencePolicy. When both an identifier and a literal reference are provided, the literal reference is preferred. Applications processing the resource are allowed - but not required - to check that the identifier matches the literal reference Applications converting a logical reference to a literal reference may choose to leave the logical reference present, or remove it.
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| display | Σ | 0..1 | string | Short description: Text alternative for the resource Definition:Plain text narrative that identifies the resource in addition to the resource reference. This is generally not the same as the Resource.text of the referenced resource. The purpose is to identify what's being referenced, not to fully describe it.
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| device | 1..1 | Reference(Numeric DeviceMetric Profile) | Short description: (Measurement) Device Definition:Observation.device shall be present and refer to the Numeric DeviceMetric resource where this observation belongs to. An extension should be used if further typing of the device is needed. Devices used to support obtaining an observation can be represented using either an extension or through the Observation.related element. Reference(Numeric DeviceMetric Profile) Constraints
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| extension | 0..* | 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. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. 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. Unordered, Open, by url(Value) Constraints
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| reference | Σ | 0..1 | string | 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. 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.
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| identifier | Σ | 0..1 | Identifier | Short description: Logical reference, when literal reference is not known Definition:An identifier for the other resource. This is used when there is no way to reference the other resource directly, either because the entity is not available through a FHIR server, or because there is no way for the author of the resource to convert a known identifier to an actual location. There is no requirement that a Reference.identifier point to something that is actually exposed as a FHIR instance, but it SHALL point to a business concept that would be expected to be exposed as a FHIR instance, and that instance would need to be of a FHIR resource type allowed by the reference. When an identifier is provided in place of a reference, any system processing the reference will only be able to resolve the identifier to a reference if it understands the business context in which the identifier is used. Sometimes this is global (e.g. a national identifier) but often it is not. For this reason, none of the useful mechanisms described for working with references (e.g. chaining, includes) are possible, nor should servers be expected to be able resolve the reference. Servers may accept an identifier based reference untouched, resolve it, and/or reject it - see CapabilityStatement.rest.resource.referencePolicy. When both an identifier and a literal reference are provided, the literal reference is preferred. Applications processing the resource are allowed - but not required - to check that the identifier matches the literal reference Applications converting a logical reference to a literal reference may choose to leave the logical reference present, or remove it.
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| display | Σ | 0..1 | string | Short description: Text alternative for the resource Definition:Plain text narrative that identifies the resource in addition to the resource reference. This is generally not the same as the Resource.text of the referenced resource. The purpose is to identify what's being referenced, not to fully describe it.
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| referenceRange | 0..* | BackboneElement | Short description: Provides guide for interpretation Definition:Guidance on how to interpret the value by comparison to a normal or recommended range. Knowing what values are considered "normal" can help evaluate the significance of a particular result. Need to be able to provide multiple reference ranges for different contexts. Most observations only have one generic reference range. Systems MAY choose to restrict to only supplying the relevant reference range based on knowledge about the patient (e.g., specific to the patient's age, gender, weight and other factors), but this may 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.
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| extension | 0..* | 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. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. 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. Unordered, Open, by url(Value) Constraints
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| low | 0..1 | SimpleQuantity | Short description: Low Range, if relevant Definition:The value of the low bound of the reference range. The low bound of the reference range endpoint is inclusive of the value (e.g. reference range is >=5 - <=9). If the low bound is omitted, it is assumed to be meaningless (e.g. reference range is <=2.3). The context of use may frequently define what kind of quantity this is and therefore what kind of units can be used. The context of use may also restrict the values for the comparator.
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| extension | 0..* | 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. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. 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. Unordered, Open, by url(Value) Constraints
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| value | Σ | 0..1 | decimal | Short description: Numerical value (with implicit precision) Definition:The value of the measured amount. The value includes an implicit precision in the presentation of the value. Precision is handled implicitly in almost all cases of measurement. The implicit precision in the value should always be honored. Monetary values have their own rules for handling precision (refer to standard accounting text books).
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| comparator | Σ ?! | 0..0 | codeBinding | Short description: < | <= | >= | > - how to understand the value Definition:Not allowed to be used in this context Need a framework for handling measures where the value is <5ug/L or >400mg/L due to the limitations of measuring methodology. This is labeled as "Is Modifier" because the comparator modifies the interpretation of the value significantly. If there is no comparator, then there is no modification of the value. quantity-comparator (required) Constraints
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| unit | Σ | 0..1 | string | Short description: Unit representation Definition:A human-readable form of the unit. There are many representations for units of measure and in many contexts, particular representations are fixed and required. I.e. mcg for micrograms. Note that FHIR strings may not exceed 1MB in size
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| system | Σ | 0..1 | uri | Short description: System that defines coded unit form Definition:The identification of the system that provides the coded form of the unit. Need to know the system that defines the coded form of the unit. see http://en.wikipedia.org/wiki/Uniform_resource_identifier
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| code | Σ | 0..1 | code | Short description: Coded form of the unit Definition:A computer processable form of the unit in some unit representation system. Need a computable form of the unit that is fixed across all forms. UCUM provides this for quantities, but SNOMED CT provides many units of interest. The preferred system is UCUM, but SNOMED CT can also be used (for customary units) or ISO 4217 for currency. The context of use may additionally require a code from a particular system.
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| high | 0..1 | SimpleQuantity | Short description: High Range, if relevant Definition:The value of the high bound of the reference range. The high bound of the reference range endpoint is inclusive of the value (e.g. reference range is >=5 - <=9). If the high bound is omitted, it is assumed to be meaningless (e.g. reference range is >= 2.3). The context of use may frequently define what kind of quantity this is and therefore what kind of units can be used. The context of use may also restrict the values for the comparator.
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| extension | 0..* | 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. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. 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. Unordered, Open, by url(Value) Constraints
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| value | Σ | 0..1 | decimal | Short description: Numerical value (with implicit precision) Definition:The value of the measured amount. The value includes an implicit precision in the presentation of the value. Precision is handled implicitly in almost all cases of measurement. The implicit precision in the value should always be honored. Monetary values have their own rules for handling precision (refer to standard accounting text books).
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| comparator | Σ ?! | 0..0 | codeBinding | Short description: < | <= | >= | > - how to understand the value Definition:Not allowed to be used in this context Need a framework for handling measures where the value is <5ug/L or >400mg/L due to the limitations of measuring methodology. This is labeled as "Is Modifier" because the comparator modifies the interpretation of the value significantly. If there is no comparator, then there is no modification of the value. quantity-comparator (required) Constraints
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| unit | Σ | 0..1 | string | Short description: Unit representation Definition:A human-readable form of the unit. There are many representations for units of measure and in many contexts, particular representations are fixed and required. I.e. mcg for micrograms. Note that FHIR strings may not exceed 1MB in size
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| system | Σ | 0..1 | uri | Short description: System that defines coded unit form Definition:The identification of the system that provides the coded form of the unit. Need to know the system that defines the coded form of the unit. see http://en.wikipedia.org/wiki/Uniform_resource_identifier
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| code | Σ | 0..1 | code | Short description: Coded form of the unit Definition:A computer processable form of the unit in some unit representation system. Need a computable form of the unit that is fixed across all forms. UCUM provides this for quantities, but SNOMED CT provides many units of interest. The preferred system is UCUM, but SNOMED CT can also be used (for customary units) or ISO 4217 for currency. The context of use may additionally require a code from a particular system.
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| type | 0..1 | CodeableConceptBinding | Short description: Reference range qualifier Definition:Codes to indicate the what part of the targeted reference population it applies to. For example, the normal or therapeutic range. Need to be able to say what kind of reference range this is - normal, recommended, therapeutic, etc, - for proper interpretation. This SHOULD be populated if there is more than one range. If this element is not present then the normal range is assumed. referencerange-meaning (extensible) Constraints
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| extension | 0..* | 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. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. 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. Unordered, Open, by url(Value) Constraints
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| coding | Σ | 0..* | Coding | Short description: Code defined by a terminology system Definition:A reference to a code defined by a terminology system. Allows for translations and alternate encodings within a code system. Also supports communication of the same instance to systems requiring different encodings. 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.
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| extension | 0..* | 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. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. 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. Unordered, Open, by url(Value) Constraints
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| system | Σ | 0..1 | uri | Short description: Identity of the terminology system Definition:The identification of the code system that defines the meaning of the symbol in the code. Need to be unambiguous about the source of the definition of the symbol. The URI may be an OID (urn:oid:...) or a UUID (urn:uuid:...). OIDs and UUIDs SHALL be references to the HL7 OID registry. Otherwise, the URI should come from HL7's list of FHIR defined special URIs or it should de-reference to some definition that establish the system clearly and unambiguously.
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| version | Σ | 0..1 | string | 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. 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.
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| code | Σ | 0..1 | 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). Need to refer to a particular code in the system. Note that FHIR strings may not exceed 1MB in size
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| display | Σ | 0..1 | string | 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. Need to be able to carry a human-readable meaning of the code for readers that do not know the system. Note that FHIR strings may not exceed 1MB in size
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| userSelected | Σ | 0..1 | boolean | Short description: If this coding was chosen directly by the user Definition:Indicates that this coding was chosen by a user directly - i.e. off a pick list of available items (codes or displays). This has been identified as a clinical safety criterium - that this exact system/code pair was chosen explicitly, rather than inferred by the system based on some rules or language processing. Amongst a set of alternatives, a directly chosen code is the most appropriate starting point for new translations. There is some ambiguity about what exactly 'directly chosen' implies, and trading partner agreement may be needed to clarify the use of this element and its consequences more completely.
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| text | Σ | 0..1 | string | 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. The codes from the terminologies do not always capture the correct meaning with all the nuances of the human using them, or sometimes there is no appropriate code at all. In these cases, the text is used to capture the full meaning of the source. Very often the text is the same as a displayName of one of the codings.
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| appliesTo | 0..* | CodeableConcept | Short description: Reference range population Definition:Codes to indicate the target population this reference range applies to. For example, a reference range may be based on the normal population or a particular sex or race. Need to be able to identify the target population for proper interpretation. This SHOULD be populated if there is more than one range. If this element is not present then the normal population is assumed. referencerange-appliesto (example) Constraints
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| extension | 0..* | 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. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. 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. Unordered, Open, by url(Value) Constraints
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| coding | Σ | 0..* | Coding | Short description: Code defined by a terminology system Definition:A reference to a code defined by a terminology system. Allows for translations and alternate encodings within a code system. Also supports communication of the same instance to systems requiring different encodings. 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.
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| extension | 0..* | 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. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. 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. Unordered, Open, by url(Value) Constraints
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| system | Σ | 0..1 | uri | Short description: Identity of the terminology system Definition:The identification of the code system that defines the meaning of the symbol in the code. Need to be unambiguous about the source of the definition of the symbol. The URI may be an OID (urn:oid:...) or a UUID (urn:uuid:...). OIDs and UUIDs SHALL be references to the HL7 OID registry. Otherwise, the URI should come from HL7's list of FHIR defined special URIs or it should de-reference to some definition that establish the system clearly and unambiguously.
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| version | Σ | 0..1 | string | 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. 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.
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| code | Σ | 0..1 | 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). Need to refer to a particular code in the system. Note that FHIR strings may not exceed 1MB in size
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| display | Σ | 0..1 | string | 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. Need to be able to carry a human-readable meaning of the code for readers that do not know the system. Note that FHIR strings may not exceed 1MB in size
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| userSelected | Σ | 0..1 | boolean | Short description: If this coding was chosen directly by the user Definition:Indicates that this coding was chosen by a user directly - i.e. off a pick list of available items (codes or displays). This has been identified as a clinical safety criterium - that this exact system/code pair was chosen explicitly, rather than inferred by the system based on some rules or language processing. Amongst a set of alternatives, a directly chosen code is the most appropriate starting point for new translations. There is some ambiguity about what exactly 'directly chosen' implies, and trading partner agreement may be needed to clarify the use of this element and its consequences more completely.
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| text | Σ | 0..1 | string | 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. The codes from the terminologies do not always capture the correct meaning with all the nuances of the human using them, or sometimes there is no appropriate code at all. In these cases, the text is used to capture the full meaning of the source. Very often the text is the same as a displayName of one of the codings.
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| age | 0..1 | Range | Short description: Applicable age range, if relevant Definition:The age at which this reference range is applicable. This is a neonatal age (e.g. number of weeks at term) if the meaning says so. Some analytes vary greatly over age. The stated low and high value are assumed to have arbitrarily high precision when it comes to determining which values are in the range. I.e. 1.99 is not in the range 2 -> 3.
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| extension | 0..* | 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. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. 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. Unordered, Open, by url(Value) Constraints
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| low | Σ | 0..1 | SimpleQuantity | Short description: Low limit Definition:The low limit. The boundary is inclusive. If the low element is missing, the low boundary is not known.
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| extension | 0..* | 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. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. 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. Unordered, Open, by url(Value) Constraints
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| value | Σ | 0..1 | decimal | Short description: Numerical value (with implicit precision) Definition:The value of the measured amount. The value includes an implicit precision in the presentation of the value. Precision is handled implicitly in almost all cases of measurement. The implicit precision in the value should always be honored. Monetary values have their own rules for handling precision (refer to standard accounting text books).
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| comparator | Σ ?! | 0..0 | codeBinding | Short description: < | <= | >= | > - how to understand the value Definition:Not allowed to be used in this context Need a framework for handling measures where the value is <5ug/L or >400mg/L due to the limitations of measuring methodology. This is labeled as "Is Modifier" because the comparator modifies the interpretation of the value significantly. If there is no comparator, then there is no modification of the value. quantity-comparator (required) Constraints
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| unit | Σ | 0..1 | string | Short description: Unit representation Definition:A human-readable form of the unit. There are many representations for units of measure and in many contexts, particular representations are fixed and required. I.e. mcg for micrograms. Note that FHIR strings may not exceed 1MB in size
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| system | Σ | 0..1 | uri | Short description: System that defines coded unit form Definition:The identification of the system that provides the coded form of the unit. Need to know the system that defines the coded form of the unit. see http://en.wikipedia.org/wiki/Uniform_resource_identifier
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| code | Σ | 0..1 | code | Short description: Coded form of the unit Definition:A computer processable form of the unit in some unit representation system. Need a computable form of the unit that is fixed across all forms. UCUM provides this for quantities, but SNOMED CT provides many units of interest. The preferred system is UCUM, but SNOMED CT can also be used (for customary units) or ISO 4217 for currency. The context of use may additionally require a code from a particular system.
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| high | Σ | 0..1 | SimpleQuantity | Short description: High limit Definition:The high limit. The boundary is inclusive. If the high element is missing, the high boundary is not known.
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| extension | 0..* | 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. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. 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. Unordered, Open, by url(Value) Constraints
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| value | Σ | 0..1 | decimal | Short description: Numerical value (with implicit precision) Definition:The value of the measured amount. The value includes an implicit precision in the presentation of the value. Precision is handled implicitly in almost all cases of measurement. The implicit precision in the value should always be honored. Monetary values have their own rules for handling precision (refer to standard accounting text books).
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| comparator | Σ ?! | 0..0 | codeBinding | Short description: < | <= | >= | > - how to understand the value Definition:Not allowed to be used in this context Need a framework for handling measures where the value is <5ug/L or >400mg/L due to the limitations of measuring methodology. This is labeled as "Is Modifier" because the comparator modifies the interpretation of the value significantly. If there is no comparator, then there is no modification of the value. quantity-comparator (required) Constraints
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| unit | Σ | 0..1 | string | Short description: Unit representation Definition:A human-readable form of the unit. There are many representations for units of measure and in many contexts, particular representations are fixed and required. I.e. mcg for micrograms. Note that FHIR strings may not exceed 1MB in size
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| system | Σ | 0..1 | uri | Short description: System that defines coded unit form Definition:The identification of the system that provides the coded form of the unit. Need to know the system that defines the coded form of the unit. see http://en.wikipedia.org/wiki/Uniform_resource_identifier
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| code | Σ | 0..1 | code | Short description: Coded form of the unit Definition:A computer processable form of the unit in some unit representation system. Need a computable form of the unit that is fixed across all forms. UCUM provides this for quantities, but SNOMED CT provides many units of interest. The preferred system is UCUM, but SNOMED CT can also be used (for customary units) or ISO 4217 for currency. The context of use may additionally require a code from a particular system.
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| text | 0..1 | string | Short description: Text based reference range in an observation Definition:Text based reference range in an observation which may be used when a quantitative range is not appropriate for an observation. An example would be a reference value of "Negative" or a list or table of 'normals'. Note that FHIR strings may not exceed 1MB in size
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| related | Σ | 0..* | BackboneElement | Short description: Resource related to this observation Definition:A reference to another resource (usually another Observation) whose relationship is defined by the relationship type code. Normally, an observation will have either a value or a set of related observations. A few observations (e.g. Apgar score) may have both a value and a set of related observations or sometimes a QuestionnaireResponse from which the measure is derived. For a discussion on the ways Observations can assembled in groups together see Notes below.
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| extension | 0..* | 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. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. 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. Unordered, Open, by url(Value) Constraints
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| type | 0..1 | codeBinding | Short description: has-member | derived-from | sequel-to | replaces | qualified-by | interfered-by Definition:A code specifying the kind of relationship that exists with the target resource. A relationship type SHOULD be provided. The "derived-from" type is the only logical choice when referencing the QuestionnaireAnswer resource. observation-relationshiptypes (required) Constraints
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| target | 1..1 | Reference(Observation | QuestionnaireResponse | Sequence) | Short description: Resource that is related to this one Definition:A reference to the observation or QuestionnaireResponse resource that is related to this observation. References SHALL be a reference to an actual FHIR resource, and SHALL be resolveable (allowing for access control, temporary unavailability, etc). Resolution can be either by retrieval from the URL, or, where applicable by resource type, by treating an absolute reference as a canonical URL and looking it up in a local registry/repository. Reference(Observation | QuestionnaireResponse | Sequence) Constraints
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| extension | 0..* | 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. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. 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. Unordered, Open, by url(Value) Constraints
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| reference | Σ | 0..1 | string | 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. 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.
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| identifier | Σ | 0..1 | Identifier | Short description: Logical reference, when literal reference is not known Definition:An identifier for the other resource. This is used when there is no way to reference the other resource directly, either because the entity is not available through a FHIR server, or because there is no way for the author of the resource to convert a known identifier to an actual location. There is no requirement that a Reference.identifier point to something that is actually exposed as a FHIR instance, but it SHALL point to a business concept that would be expected to be exposed as a FHIR instance, and that instance would need to be of a FHIR resource type allowed by the reference. When an identifier is provided in place of a reference, any system processing the reference will only be able to resolve the identifier to a reference if it understands the business context in which the identifier is used. Sometimes this is global (e.g. a national identifier) but often it is not. For this reason, none of the useful mechanisms described for working with references (e.g. chaining, includes) are possible, nor should servers be expected to be able resolve the reference. Servers may accept an identifier based reference untouched, resolve it, and/or reject it - see CapabilityStatement.rest.resource.referencePolicy. When both an identifier and a literal reference are provided, the literal reference is preferred. Applications processing the resource are allowed - but not required - to check that the identifier matches the literal reference Applications converting a logical reference to a literal reference may choose to leave the logical reference present, or remove it.
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| display | Σ | 0..1 | string | Short description: Text alternative for the resource Definition:Plain text narrative that identifies the resource in addition to the resource reference. This is generally not the same as the Resource.text of the referenced resource. The purpose is to identify what's being referenced, not to fully describe it.
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| component | Σ | 1..* | BackboneElement | 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. 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.
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| extension | 0..* | 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. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. 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. Unordered, Open, by url(Value) Constraints
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| measurementStatus | 0..* | Extension | Short description: Measurement status Alternate names:extensions, user content Definition:The Measurement Status extension provides more detailed status information about observed values. It gets a code from the Measurement Status value set. 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. http://devices.fhir.org/StructureDefinition/observation-measurement-status Constraints
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| code | Σ | 1..1 | CodeableConcept | Short description: Component numeric type Definition:Observation.component.code shall have a coding from the ISO/IEEE 11073 MDC metrics nomenclature. The Rosetta Terminology Mapping Management System (RTMMS) lists available codes. Depending on the type of measurement, the Vital Signs profiles may require an additional LOINC code. Knowing what kind of observation is being made is essential to understanding the observation. 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.
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| extension | 0..* | 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. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. 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. Unordered, Open, by url(Value) Constraints
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| coding | Σ | 1..* | Coding | Short description: Code defined by a terminology system Definition:A reference to a code defined by a terminology system. Allows for translations and alternate encodings within a code system. Also supports communication of the same instance to systems requiring different encodings. 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. Unordered, Open, by system(Value) Constraints
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| extension | 0..* | 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. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. 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. Unordered, Open, by url(Value) Constraints
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| system | Σ | 0..1 | uri | Short description: Identity of the terminology system Definition:The identification of the code system that defines the meaning of the symbol in the code. Need to be unambiguous about the source of the definition of the symbol. The URI may be an OID (urn:oid:...) or a UUID (urn:uuid:...). OIDs and UUIDs SHALL be references to the HL7 OID registry. Otherwise, the URI should come from HL7's list of FHIR defined special URIs or it should de-reference to some definition that establish the system clearly and unambiguously.
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| version | Σ | 0..1 | string | 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. 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.
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| code | Σ | 0..1 | 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). Need to refer to a particular code in the system. Note that FHIR strings may not exceed 1MB in size
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| display | Σ | 0..1 | string | 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. Need to be able to carry a human-readable meaning of the code for readers that do not know the system. Note that FHIR strings may not exceed 1MB in size
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| userSelected | Σ | 0..1 | boolean | Short description: If this coding was chosen directly by the user Definition:Indicates that this coding was chosen by a user directly - i.e. off a pick list of available items (codes or displays). This has been identified as a clinical safety criterium - that this exact system/code pair was chosen explicitly, rather than inferred by the system based on some rules or language processing. Amongst a set of alternatives, a directly chosen code is the most appropriate starting point for new translations. There is some ambiguity about what exactly 'directly chosen' implies, and trading partner agreement may be needed to clarify the use of this element and its consequences more completely.
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| 11073MDC | Σ | 1..1 | Coding | Short description: 11073 MDC code Definition:Code defined by the ISO/IEEE 11073-10101 Nomenclature Allows for translations and alternate encodings within a code system. Also supports communication of the same instance to systems requiring different encodings. 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.
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| extension | 0..* | 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. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. 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. Unordered, Open, by url(Value) Constraints
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| system | Σ | 1..1 | uriFixed Value | Short description: Identity of the terminology system Definition:The identification of the code system that defines the meaning of the symbol in the code. Need to be unambiguous about the source of the definition of the symbol. The URI may be an OID (urn:oid:...) or a UUID (urn:uuid:...). OIDs and UUIDs SHALL be references to the HL7 OID registry. Otherwise, the URI should come from HL7's list of FHIR defined special URIs or it should de-reference to some definition that establish the system clearly and unambiguously.
urn:iso:std:iso:11073:10101
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| version | Σ | 0..1 | string | 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. 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.
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| code | Σ | 1..1 | 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). Need to refer to a particular code in the system. Note that FHIR strings may not exceed 1MB in size
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| display | Σ | 0..1 | string | 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. Need to be able to carry a human-readable meaning of the code for readers that do not know the system. Note that FHIR strings may not exceed 1MB in size
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| userSelected | Σ | 0..1 | boolean | Short description: If this coding was chosen directly by the user Definition:Indicates that this coding was chosen by a user directly - i.e. off a pick list of available items (codes or displays). This has been identified as a clinical safety criterium - that this exact system/code pair was chosen explicitly, rather than inferred by the system based on some rules or language processing. Amongst a set of alternatives, a directly chosen code is the most appropriate starting point for new translations. There is some ambiguity about what exactly 'directly chosen' implies, and trading partner agreement may be needed to clarify the use of this element and its consequences more completely.
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| text | Σ | 0..1 | string | 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. The codes from the terminologies do not always capture the correct meaning with all the nuances of the human using them, or sometimes there is no appropriate code at all. In these cases, the text is used to capture the full meaning of the source. Very often the text is the same as a displayName of one of the codings.
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| valueQuantity | Σ | 0..1 | Quantity | Short description: Actual component result Definition:The information determined as a result of making the observation, if the information has a simple value. An observation exists to have a value, though it may not if it is in error, or if it represents a group of observations. Normally, an observation will have either a single value or a set of related observations. A few observations (e.g. Apgar score) may have both a value and related observations (for an Apgar score, the observations from which the measure is derived). If a value is present, the datatype for this element should be determined by Observation.code. A 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 Observation.code defines a coded value. For boolean values use valueCodeableConcept and select codes from http://hl7.org/fhir/ValueSet/v2-0136 (these "yes/no" concepts can be mapped to the display name "true/false" or other mutually exclusive terms that may be needed"). The element, Observation.value[x], has a variable name depending on the type as follows: valueQuantity, valueCodeableConcept, valueRatio, valueChoice, valuePeriod, valueSampleData, or valueString (the name format is "'value' + the type name" with a capital on the first letter of the type).
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| extension | 0..* | 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. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. 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. Unordered, Open, by url(Value) Constraints
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| value | Σ | 1..1 | decimal | Short description: Numerical value (with implicit precision) Definition:The value of the measured amount. The value includes an implicit precision in the presentation of the value. Precision is handled implicitly in almost all cases of measurement. The implicit precision in the value should always be honored. Monetary values have their own rules for handling precision (refer to standard accounting text books).
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| comparator | Σ ?! | 0..1 | codeBinding | Short description: < | <= | >= | > - how to understand the value Definition:How the value should be understood and represented - whether the actual value is greater or less than the stated value due to measurement issues; e.g. if the comparator is "<" , then the real value is < stated value. Need a framework for handling measures where the value is <5ug/L or >400mg/L due to the limitations of measuring methodology. This is labeled as "Is Modifier" because the comparator modifies the interpretation of the value significantly. If there is no comparator, then there is no modification of the value. quantity-comparator (required) Constraints
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| unit | Σ | 0..1 | string | Short description: Unit representation Definition:A human-readable form of the unit. There are many representations for units of measure and in many contexts, particular representations are fixed and required. I.e. mcg for micrograms. Note that FHIR strings may not exceed 1MB in size
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| system | Σ | 0..1 | uriFixed Value | Short description: System that defines coded unit form Definition:The identification of the system that provides the coded form of the unit. Need to know the system that defines the coded form of the unit. see http://en.wikipedia.org/wiki/Uniform_resource_identifier
http://unitsofmeasure.org
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| code | Σ | 0..1 | code | Short description: Coded form of the unit Definition:A computer processable form of the unit in some unit representation system. Need a computable form of the unit that is fixed across all forms. UCUM provides this for quantities, but SNOMED CT provides many units of interest. The preferred system is UCUM, but SNOMED CT can also be used (for customary units) or ISO 4217 for currency. The context of use may additionally require a code from a particular system.
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| dataAbsentReason | 0..1 | CodeableConceptBinding | Short description: Why the component result is missing Definition:Provides a reason why the expected value in the element Observation.value[x] is missing. For many results it is necessary to handle exceptional values in measurements. "Null" or exceptional values can be represented two ways in FHIR Observations. One way is to simply include them in the value set and represent the exceptions in the value. For example, measurement values for a serology test could be "detected", "not detected", "inconclusive", or "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. observation-valueabsentreason (extensible) Constraints
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| extension | 0..* | 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. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. 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. Unordered, Open, by url(Value) Constraints
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| coding | Σ | 0..* | Coding | Short description: Code defined by a terminology system Definition:A reference to a code defined by a terminology system. Allows for translations and alternate encodings within a code system. Also supports communication of the same instance to systems requiring different encodings. 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.
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| extension | 0..* | 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. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. 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. Unordered, Open, by url(Value) Constraints
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| system | Σ | 0..1 | uri | Short description: Identity of the terminology system Definition:The identification of the code system that defines the meaning of the symbol in the code. Need to be unambiguous about the source of the definition of the symbol. The URI may be an OID (urn:oid:...) or a UUID (urn:uuid:...). OIDs and UUIDs SHALL be references to the HL7 OID registry. Otherwise, the URI should come from HL7's list of FHIR defined special URIs or it should de-reference to some definition that establish the system clearly and unambiguously.
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| version | Σ | 0..1 | string | 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. 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.
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| code | Σ | 0..1 | 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). Need to refer to a particular code in the system. Note that FHIR strings may not exceed 1MB in size
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| display | Σ | 0..1 | string | 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. Need to be able to carry a human-readable meaning of the code for readers that do not know the system. Note that FHIR strings may not exceed 1MB in size
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| userSelected | Σ | 0..1 | boolean | Short description: If this coding was chosen directly by the user Definition:Indicates that this coding was chosen by a user directly - i.e. off a pick list of available items (codes or displays). This has been identified as a clinical safety criterium - that this exact system/code pair was chosen explicitly, rather than inferred by the system based on some rules or language processing. Amongst a set of alternatives, a directly chosen code is the most appropriate starting point for new translations. There is some ambiguity about what exactly 'directly chosen' implies, and trading partner agreement may be needed to clarify the use of this element and its consequences more completely.
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| text | Σ | 0..1 | string | 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. The codes from the terminologies do not always capture the correct meaning with all the nuances of the human using them, or sometimes there is no appropriate code at all. In these cases, the text is used to capture the full meaning of the source. Very often the text is the same as a displayName of one of the codings.
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| interpretation | 0..1 | CodeableConceptBinding | Short description: High, low, normal, etc. Alternate names:Abnormal Flag Definition:The assessment made based on the result of the observation. Intended as a simple compact code often placed adjacent to the result value in reports and flow sheets to signal the meaning/normalcy status of the result. Otherwise known as abnormal flag. For some results, particularly numeric results, an interpretation is necessary to fully understand the significance of a result. The component interpretation applies only to the individual component value. For an overall interpretation all components together use thes Observation.interpretation element. observation-interpretation (extensible) Constraints
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| extension | 0..* | 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. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. 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. Unordered, Open, by url(Value) Constraints
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| coding | Σ | 0..* | Coding | Short description: Code defined by a terminology system Definition:A reference to a code defined by a terminology system. Allows for translations and alternate encodings within a code system. Also supports communication of the same instance to systems requiring different encodings. 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.
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| extension | 0..* | 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. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. 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. Unordered, Open, by url(Value) Constraints
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| system | Σ | 0..1 | uri | Short description: Identity of the terminology system Definition:The identification of the code system that defines the meaning of the symbol in the code. Need to be unambiguous about the source of the definition of the symbol. The URI may be an OID (urn:oid:...) or a UUID (urn:uuid:...). OIDs and UUIDs SHALL be references to the HL7 OID registry. Otherwise, the URI should come from HL7's list of FHIR defined special URIs or it should de-reference to some definition that establish the system clearly and unambiguously.
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| version | Σ | 0..1 | string | 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. 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.
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| code | Σ | 0..1 | 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). Need to refer to a particular code in the system. Note that FHIR strings may not exceed 1MB in size
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| display | Σ | 0..1 | string | 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. Need to be able to carry a human-readable meaning of the code for readers that do not know the system. Note that FHIR strings may not exceed 1MB in size
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| userSelected | Σ | 0..1 | boolean | Short description: If this coding was chosen directly by the user Definition:Indicates that this coding was chosen by a user directly - i.e. off a pick list of available items (codes or displays). This has been identified as a clinical safety criterium - that this exact system/code pair was chosen explicitly, rather than inferred by the system based on some rules or language processing. Amongst a set of alternatives, a directly chosen code is the most appropriate starting point for new translations. There is some ambiguity about what exactly 'directly chosen' implies, and trading partner agreement may be needed to clarify the use of this element and its consequences more completely.
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| text | Σ | 0..1 | string | 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. The codes from the terminologies do not always capture the correct meaning with all the nuances of the human using them, or sometimes there is no appropriate code at all. In these cases, the text is used to capture the full meaning of the source. Very often the text is the same as a displayName of one of the codings.
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| referenceRange | 0..* | see (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. Knowing what values are considered "normal" can help evaluate the significance of a particular result. Need to be able to provide multiple reference ranges for different contexts. Most observations only have one generic reference range. Systems MAY choose to restrict to only supplying the relevant reference range based on knowledge about the patient (e.g., specific to the patient's age, gender, weight and other factors), but this may 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.
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Example (XML view)
Example of a NBP Compound Numeric Observation
<Observation> <id value="623" /> <meta> <profile value="http://devices.fhir.org/StructureDefinition/CompoundNumericObservation" /> </meta> <status value="final" /> <category> <coding> <system value="http://hl7.org/fhir/observation-category" /> <code value="vital-signs" /> <display value="Vital Signs" /> </coding> </category> <code> <coding> <system value="http://loinc.org" /> <code value="85354-9" /> <display value="Blood pressure panel with all children optional" /> </coding> <coding> <system value="urn:iso:std:iso:11073:10101" /> <code value="150020" /> <display value="MDC_PRESS_BLD_NONINV" /> </coding> </code> <subject> <reference value="Patient/371" /> </subject> <effectiveDateTime value="2017-06-02T11:00:59+02:00" /> <device> <reference value="DeviceMetric/216" /> </device> <component> <code> <coding> <system value="http://loinc.org" /> <code value="8480-6" /> <display value="Systolic blood pressure" /> </coding> <coding> <system value="urn:iso:std:iso:11073:10101" /> <code value="150021" /> <display value="MDC_PRESS_BLD_NONINV_SYS" /> </coding> </code> <valueQuantity> <value value="120" /> <unit value="mmHg" /> <system value="http://unitsofmeasure.org" /> <code value="mm[Hg]" /> </valueQuantity> </component> <component> <code> <coding> <system value="http://loinc.org" /> <code value="8462-4" /> <display value="Diastolic blood pressure" /> </coding> <coding> <system value="urn:iso:std:iso:11073:10101" /> <code value="150022" /> <display value="MDC_PRESS_BLD_NONINV_DIA" /> </coding> </code> <valueQuantity> <value value="80" /> <unit value="mmHg" /> <system value="http://unitsofmeasure.org" /> <code value="mm[Hg]" /> </valueQuantity> </component> <component> <code> <coding> <system value="http://loinc.org" /> <code value="8478-0" /> <display value="Mean blood pressure" /> </coding> <coding> <system value="urn:iso:std:iso:11073:10101" /> <code value="150023" /> <display value="MDC_PRESS_BLD_NONINV_MEAN" /> </coding> </code> <valueQuantity> <value value="90" /> <unit value="mmHg" /> <system value="http://unitsofmeasure.org" /> <code value="mm[Hg]" /> </valueQuantity> </component> </Observation>
Example (JSON view)
Example of a NBP Compound Numeric Observation
{ "resourceType":"Observation", "id":"623", "meta":{ "profile": [ "http://devices.fhir.org/StructureDefinition/CompoundNumericObservation" ] }, "status":"final", "category": [ { "coding": [ { "system":"http://hl7.org/fhir/observation-category", "code":"vital-signs", "display":"Vital Signs" } ] } ], "code":{ "coding": [ { "system":"http://loinc.org", "code":"85354-9", "display":"Blood pressure panel with all children optional" }, { "system":"urn:iso:std:iso:11073:10101", "code":"150020", "display":"MDC_PRESS_BLD_NONINV" } ] }, "subject":{ "reference":"Patient/371" }, "effectiveDateTime":"2017-06-02T11:00:59+02:00", "device":{ "reference":"DeviceMetric/216" }, "component": [ { "code":{ "coding": [ { "system":"http://loinc.org", "code":"8480-6", "display":"Systolic blood pressure" }, { "system":"urn:iso:std:iso:11073:10101", "code":"150021", "display":"MDC_PRESS_BLD_NONINV_SYS" } ] }, "valueQuantity":{ "value":"120", "unit":"mmHg", "system":"http://unitsofmeasure.org", "code":"mm[Hg]" } }, { "code":{ "coding": [ { "system":"http://loinc.org", "code":"8462-4", "display":"Diastolic blood pressure" }, { "system":"urn:iso:std:iso:11073:10101", "code":"150022", "display":"MDC_PRESS_BLD_NONINV_DIA" } ] }, "valueQuantity":{ "value":"80", "unit":"mmHg", "system":"http://unitsofmeasure.org", "code":"mm[Hg]" } }, { "code":{ "coding": [ { "system":"http://loinc.org", "code":"8478-0", "display":"Mean blood pressure" }, { "system":"urn:iso:std:iso:11073:10101", "code":"150023", "display":"MDC_PRESS_BLD_NONINV_MEAN" } ] }, "valueQuantity":{ "value":"90", "unit":"mmHg", "system":"http://unitsofmeasure.org", "code":"mm[Hg]" } } ] }