Structured Data Capture
4.0.0 -
Structured Data Capture
4.0.0 -
Structured Data Capture, published by HL7 International / FHIR Infrastructure. This guide is not an authorized publication; it is the continuous build for version 4.0.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7/sdc/ and changes regularly. See the Directory of published versions
| Official URL: http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-unitOpen | Version: 4.0.0 | |||
| Standards status: Trial-use Active as of 2025-10-22 | Maturity Level: 4 | Computable Name: UnitOpen | ||
| Other Identifiers: OID:2.16.840.1.113883.4.642.40.17.42.57 | ||||
Indicates whether the list of supported units (conveyed in other extensions) are the exhaustive list from which the user must choose or whether they're able to select alternate codes or specify a string.
Context of Use
This extension may be used on the following element(s)
Questionnaire.item
ElementDefinition
Usage info
Usages:
You can also check for usages in the FHIR IG Statistics
Description Differentials, Snapshots, and other representations.
| Name | Flags | Card. | Type | Description & Constraints Filter:   |
|---|---|---|---|---|
  Extension |
0..1 | Extension | Used to denote if user can specify alternate codes | |
  extension |
0..0 | |||
| url |
1..1 | uri | "http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-unitOpen" | |
  value[x] |
1..1 | code | Value of extension Binding: Questionnaire answer constraints value set (required): The types of constraints possible on a question item that has a list of permitted answers | |
| Documentation for this format | ||||
| Path | Status | Usage | ValueSet | Version | Source |
| Extension.value[x] | Base | required | Questionnaire answer constraints value set | 📦4.0.0 | This IG |
| Name | Flags | Card. | Type | Description & Constraints Filter: |
|---|---|---|---|---|
 Extension |
0..1 | Extension | Used to denote if user can specify alternate codes | |
| id |
0..1 | string | Unique id for inter-element referencing | |
| extension |
0..0 | |||
| url |
1..1 | uri | "http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-unitOpen" | |
| value[x] |
1..1 | code | Value of extension Binding: Questionnaire answer constraints value set (required): The types of constraints possible on a question item that has a list of permitted answers | |
| Documentation for this format | ||||
| Path | Status | Usage | ValueSet | Version | Source |
| Extension.value[x] | Base | required | Questionnaire answer constraints value set | 📦4.0.0 | This IG |
| 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()
|
Summary
Simple Extension with the type code: Indicates whether the list of supported units (conveyed in other extensions) are the exhaustive list from which the user must choose or whether they're able to select alternate codes or specify a string.
Maturity: 4
Differential ViewDifferential View
| Name | Flags | Card. | Type | Description & Constraints Filter: |
|---|---|---|---|---|
| Extension |
0..1 | Extension | Used to denote if user can specify alternate codes | |
| extension |
0..0 | |||
| url |
1..1 | uri | "http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-unitOpen" | |
| value[x] |
1..1 | code | Value of extension Binding: Questionnaire answer constraints value set (required): The types of constraints possible on a question item that has a list of permitted answers | |
| Documentation for this format | ||||
| Path | Status | Usage | ValueSet | Version | Source |
| Extension.value[x] | Base | required | Questionnaire answer constraints value set | 📦4.0.0 | This IG |
Snapshot View
| Name | Flags | Card. | Type | Description & Constraints Filter: |
|---|---|---|---|---|
| Extension |
0..1 | Extension | Used to denote if user can specify alternate codes | |
| id |
0..1 | string | Unique id for inter-element referencing | |
| extension |
0..0 | |||
| url |
1..1 | uri | "http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-unitOpen" | |
| value[x] |
1..1 | code | Value of extension Binding: Questionnaire answer constraints value set (required): The types of constraints possible on a question item that has a list of permitted answers | |
| Documentation for this format | ||||
| Path | Status | Usage | ValueSet | Version | Source |
| Extension.value[x] | Base | required | Questionnaire answer constraints value set | 📦4.0.0 | This IG |
| 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()
|
Summary
Simple Extension with the type code: Indicates whether the list of supported units (conveyed in other extensions) are the exhaustive list from which the user must choose or whether they're able to select alternate codes or specify a string.
Maturity: 4
Other representations of profile: CSV, Excel, Schematron
IG © 2022+ HL7 International / FHIR Infrastructure.
Package hl7.fhir.uv.sdc#4.0.0 based on FHIR 4.0.1.
Generated 2025-10-22
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