FHIR Extensions Pack
5.4.0 - May 2026 International flag

FHIR Extensions Pack, published by HL7 International / FHIR Infrastructure. This guide is not an authorized publication; it is the continuous build for version 5.4.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7/fhir-extensions/ and changes regularly. See the Directory of published versions

Extension: Text Link

Official URL: http://hl7.org/fhir/StructureDefinition/textLink Version: 5.4.0
Standards status: Trial-use Maturity Level: 3 Computable Name: TextLink
Other Identifiers: OID:2.16.840.1.113883.4.642.5.1798

Used to denote which portions of the narrative are linked to (usually, generated from) structured data in resources. This information might be used in several different ways, including translating and regenerating narrative in applications that are using/presenting the narrative. Note that there are two related extensions for linking data and narrative: originalText and narrativeLink.

Context of Use

This extension may be used on the following element(s)

Usage info

Usages:

  • This Extension is not used by any profiles in this Specification

You can also check for usages in the FHIR IG Statistics

Changes since version 5.3.0:

  • No changes

    • Formal Views of Extension Content

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

    This structure is derived from Extension

    Summary

    Complex Extension: Used to denote which portions of the narrative are linked to (usually, generated from) structured data in resources. This information might be used in several different ways, including translating and regenerating narrative in applications that are using/presenting the narrative. Note that there are two related extensions for linking data and narrative: originalText and narrativeLink.

    • htmlid: string: The id attribute on an element in the xhtml narrative
    • data: uri: The id attribute on a resource element (#{id}, relative#{id} or https://absolute#{id})
    • selector: string: FHIRPath that selects a subset of the identified data. This sub-extension exists because in some circumstances, the specific data items are in resources where the constructor of the narrative can't introduce specific ids on the relevent elements

    Maturity: 3

    This structure is derived from Extension

    NameFlagsCard.TypeDescription & Constraints    Filter: doco
    Extension 0..1 Extension Text Link
    Extension.Slices for extension Content/Rules for all slices
    Extension.Slices for extension.extension:htmlid 1..* Extension Unique identifier
    Extension.Slices for extension.extension:htmlid.extension 0..0 Extension
    Extension.Slices for extension.extension:htmlid.url 1..1 uri "htmlid"
    Extension.Slices for extension.extension:htmlid.value[x] 1..1 string Value of extension
    Extension.Slices for extension.extension:data 1..1 Extension Unique identifier
    Extension.Slices for extension.extension:data.extension 0..0 Extension
    Extension.Slices for extension.extension:data.url 1..1 uri "data"
    Extension.Slices for extension.extension:data.value[x] 1..1 uri The actual data element in this resource, or another resource
    Extension.Slices for extension.extension:selector 0..1 Extension FHIRPath that selects a subset of the identified data
    Extension.Slices for extension.extension:selector.extension 0..0 Extension
    Extension.Slices for extension.extension:selector.url 1..1 uri "selector"
    Extension.Slices for extension.extension:selector.value[x] 1..1 string Simple FHIRPath that can't use .resolve()
    Extension.url 1..1 uri "http://hl7.org/fhir/StructureDefinition/textLink"
    Extension.value[x] 0..0 Value of extension

    doco Documentation for this format

    This structure is derived from Extension

    Summary

    Complex Extension: Used to denote which portions of the narrative are linked to (usually, generated from) structured data in resources. This information might be used in several different ways, including translating and regenerating narrative in applications that are using/presenting the narrative. Note that there are two related extensions for linking data and narrative: originalText and narrativeLink.

    • htmlid: string: The id attribute on an element in the xhtml narrative
    • data: uri: The id attribute on a resource element (#{id}, relative#{id} or https://absolute#{id})
    • selector: string: FHIRPath that selects a subset of the identified data. This sub-extension exists because in some circumstances, the specific data items are in resources where the constructor of the narrative can't introduce specific ids on the relevent elements

    Maturity: 3

    Differential View

    This structure is derived from Extension

    NameFlagsCard.TypeDescription & Constraints    Filter: doco
    Extension 0..1 Extension Text Link
    Extension.Slices for extension Content/Rules for all slices
    Extension.Slices for extension.extension:htmlid 1..* Extension Unique identifier
    Extension.Slices for extension.extension:htmlid.extension 0..0 Extension
    Extension.Slices for extension.extension:htmlid.url 1..1 uri "htmlid"
    Extension.Slices for extension.extension:htmlid.value[x] 1..1 string Value of extension
    Extension.Slices for extension.extension:data 1..1 Extension Unique identifier
    Extension.Slices for extension.extension:data.extension 0..0 Extension
    Extension.Slices for extension.extension:data.url 1..1 uri "data"
    Extension.Slices for extension.extension:data.value[x] 1..1 uri The actual data element in this resource, or another resource
    Extension.Slices for extension.extension:selector 0..1 Extension FHIRPath that selects a subset of the identified data
    Extension.Slices for extension.extension:selector.extension 0..0 Extension
    Extension.Slices for extension.extension:selector.url 1..1 uri "selector"
    Extension.Slices for extension.extension:selector.value[x] 1..1 string Simple FHIRPath that can't use .resolve()
    Extension.url 1..1 uri "http://hl7.org/fhir/StructureDefinition/textLink"
    Extension.value[x] 0..0 Value of extension

    doco Documentation for this format

    Snapshot View

    NameFlagsCard.TypeDescription & Constraints    Filter: doco
    Extension 0..1 Extension Text Link
    Extension.id 0..1 id Unique id for inter-element referencing
    Extension.Slices for extension 2..* Extension Additional content defined by implementations
    Slice: Unordered, Open by value:url
    Extension.Slices for extension.extension:htmlid 1..* Extension Unique identifier
    Extension.Slices for extension.extension:htmlid.id 0..1 id Unique id for inter-element referencing
    Extension.Slices for extension.extension:htmlid.extension 0..0 Extension
    Slice: Unordered, Open by value:url

    Slicing Note: The rules on this element (including its children) apply to all the slices, but are not repeated in them
    Extension.Slices for extension.extension:htmlid.url 1..1 uri "htmlid"
    Extension.Slices for extension.extension:htmlid.value[x] 1..1 string Value of extension
    Extension.Slices for extension.extension:data 1..1 Extension Unique identifier
    Extension.Slices for extension.extension:data.id 0..1 id Unique id for inter-element referencing
    Extension.Slices for extension.extension:data.extension 0..0 Extension
    Slice: Unordered, Open by value:url

    Slicing Note: The rules on this element (including its children) apply to all the slices, but are not repeated in them
    Extension.Slices for extension.extension:data.url 1..1 uri "data"
    Extension.Slices for extension.extension:data.value[x] 1..1 uri The actual data element in this resource, or another resource
    Extension.Slices for extension.extension:selector 0..1 Extension FHIRPath that selects a subset of the identified data
    Extension.Slices for extension.extension:selector.id 0..1 id Unique id for inter-element referencing
    Extension.Slices for extension.extension:selector.extension 0..0 Extension
    Slice: Unordered, Open by value:url

    Slicing Note: The rules on this element (including its children) apply to all the slices, but are not repeated in them
    Extension.Slices for extension.extension:selector.url 1..1 uri "selector"
    Extension.Slices for extension.extension:selector.value[x] 1..1 string Simple FHIRPath that can't use .resolve()
    Extension.url 1..1 uri "http://hl7.org/fhir/StructureDefinition/textLink"

    doco Documentation for this format

     

    Other representations of profile: CSV, Excel, Schematron

    Constraints

    Id Grade Path(s) Description Expression
    ele-1 error **ALL** elements All FHIR elements must have a @value or children hasValue() or (children().count() > id.count())
    ext-1 error **ALL** extensions Must have either extensions or value[x], not both extension.exists() != value.exists()

    R4B

    The extension is unchanged in R4B

    R4

    The extension is unchanged in R4

    R3

    The extension is unchanged in R3

    Search Parameters for this Extension

    (none found)