HL7 FHIR Implementation Guide - New Zealand Formulary/NZULM IG
1.0.0 - ci-build

HL7 FHIR Implementation Guide - New Zealand Formulary/NZULM IG, published by New Zealand Medicines Formulary LP. This guide is not an authorized publication; it is the continuous build for version 1.0.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7NZ/nzf/ and changes regularly. See the Directory of published versions

Data Type Profile: NzfCoding - Detailed Descriptions

Active as of 2024-03-18

Definitions for the NzfCoding data type profile.

Guidance on how to interpret the contents of this table can be found here

0. Coding
2. Coding.extension:isPrimary
Slice NameisPrimary
ShortIs primary code within given context, e.g. primary pharmacode when multiple given
Control0..1
TypeExtension(IsPrimary) (Extension Type: boolean)

Guidance on how to interpret the contents of this table can be found here

0. Coding
Definition

A reference to a code defined by a terminology system.

ShortA reference to a code defined by a terminology system
Comments

Codes may be defined very casually in enumerations or code lists, up to very formal definitions such as SNOMED CT - see the HL7 v3 Core Principles for more information.

Control0..*
This element is affected by the following invariants: ele-1
Is Modifierfalse
Invariantsele-1: All FHIR elements must have a @value or children unless an empty Parameters resource (hasValue() or (children().count() > id.count()) or $this is Parameters)
2. Coding.extension:isPrimary
Slice NameisPrimary
Definition

Is primary code within given context, e.g. primary Pharmacode® when multiple given

ShortIs primary code within given context, e.g. primary pharmacode when multiple given
Control0..1
TypeExtension(IsPrimary) (Extension Type: boolean)
Is Modifierfalse
Summaryfalse
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())

Guidance on how to interpret the contents of this table can be found here

0. Coding
Definition

A reference to a code defined by a terminology system.

ShortA reference to a code defined by a terminology system
Comments

Codes may be defined very casually in enumerations or code lists, up to very formal definitions such as SNOMED CT - see the HL7 v3 Core Principles for more information.

Control0..*
This element is affected by the following invariants: ele-1
Is Modifierfalse
Invariantsele-1: All FHIR elements must have a @value or children unless an empty Parameters resource (hasValue() or (children().count() > id.count()) or $this is Parameters)
2. Coding.id
Definition

Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

ShortUnique id for inter-element referencing
Control0..1
Typeid
Is Modifierfalse
XML FormatIn the XML format, this property is represented as an attribute.
Summaryfalse
4. Coding.extension
Definition

May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.

ShortAdditional content defined by implementations
Comments

There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.

Control0..*
TypeExtension
Is Modifierfalse
Summaryfalse
Alternate Namesextensions, user content
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
SlicingThis element introduces a set of slices on Coding.extension. The slices are unordered and Open, and can be differentiated using the following discriminators:
  • value @ url
  • 6. Coding.extension:isPrimary
    Slice NameisPrimary
    Definition

    Is primary code within given context, e.g. primary Pharmacode® when multiple given

    ShortIs primary code within given context, e.g. primary pharmacode when multiple given
    Control0..1
    TypeExtension(IsPrimary) (Extension Type: boolean)
    Is Modifierfalse
    Summaryfalse
    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
    ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
    8. Coding.system
    Definition

    The identification of the code system that defines the meaning of the symbol in the code.

    ShortIdentity of the terminology system
    Comments

    The URI may be an OID (urn:oid:...) or a UUID (urn:uuid:...). OIDs and UUIDs SHALL be references to the HL7 OID registry. Otherwise, the URI should come from HL7's list of FHIR defined special URIs or it should reference to some definition that establishes the system clearly and unambiguously.

    Control0..1
    Typeuri
    Is Modifierfalse
    Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
    Summarytrue
    Requirements

    Need to be unambiguous about the source of the definition of the symbol.

    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
    10. Coding.version
    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.

    ShortVersion of the system - if relevant
    Comments

    Where the terminology does not clearly define what string should be used to identify code system versions, the recommendation is to use the date (expressed in FHIR date format) on which that version was officially published as the version date.

    NoteThis is a business versionId, not a resource version id (see discussion)
    Control0..1
    Typestring
    Is Modifierfalse
    Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
    Summarytrue
    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
    12. Coding.code
    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).

    ShortSymbol in syntax defined by the system
    Control0..1
    Typecode
    Is Modifierfalse
    Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
    Summarytrue
    Requirements

    Need to refer to a particular code in the system.

    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
    14. Coding.display
    Definition

    A representation of the meaning of the code in the system, following the rules of the system.

    ShortRepresentation defined by the system
    Control0..1
    Typestring
    Is Modifierfalse
    Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
    Summarytrue
    Requirements

    Need to be able to carry a human-readable meaning of the code for readers that do not know the system.

    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
    16. Coding.userSelected
    Definition

    Indicates that this coding was chosen by a user directly - e.g. off a pick list of available items (codes or displays).

    ShortIf this coding was chosen directly by the user
    Comments

    Amongst a set of alternatives, a directly chosen code is the most appropriate starting point for new translations. There is some ambiguity about what exactly 'directly chosen' implies, and trading partner agreement may be needed to clarify the use of this element and its consequences more completely.

    Control0..1
    Typeboolean
    Is Modifierfalse
    Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
    Summarytrue
    Requirements

    This has been identified as a clinical safety criterium - that this exact system/code pair was chosen explicitly, rather than inferred by the system based on some rules or language processing.

    Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))