Structured Data Capture
4.0.0 - STU 4
Structured Data Capture
4.0.0 - STU 4
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-extractAllocateId | Version: 4.0.0 | |||
| Standards status: Draft | Maturity Level: 0 | Computable Name: ExtractAllocateIdExtension | ||
| Other Identifiers: OID:2.16.840.1.113883.4.642.40.17.42.84 | ||||
Allocate a new uuid in a named variable for use in extraction. This is usually used to set the fullUrl for a resource in the output extraction bundle, and then referenced in other resources within that transaction bundle (via fhirpath expressions).
Context of Use
This extension may be used on the following element(s)
Questionnaire
Questionnaire.item
ElementDefinition
This extension currently only applies to either the definition or template extraction processing.
The value will be made available as a named variable in extract fhirpath expressions, and only within the scope of the item that contains the extension, and any child items of that collection.
When defined at the root of a questionnaire, the value will be available for all items in the questionnaire (and only allocated once).
When defined on a repeating item, the value will be new for each iteration of the item in the QuestionnaireResponse answers.
Usage info
Usages:
You can also check for usages in the FHIR IG Statistics
Description of Profiles, Differentials, Snapshots, and how the XML and JSON presentations work.
This structure is derived from Extension
| Name | Flags | Card. | Type | Description & Constraints Filter:   |
|---|---|---|---|---|
  Extension |
0..* | Extension | Variable name for the new uuid. | |
  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-extractAllocateId" | |
 value[x] |
1..1 | string | Value of extension | |
| Documentation for this format | ||||
This structure is derived from Extension
Summary
Simple Extension with the type string: Allocate a new uuid in a named variable for use in extraction. This is usually used to set the fullUrl for a resource in the output extraction bundle, and then referenced in other resources within that transaction bundle (via fhirpath expressions).
Maturity: 0
Differential View
This structure is derived from Extension
Snapshot View
| Name | Flags | Card. | Type | Description & Constraints Filter: |
|---|---|---|---|---|
| Extension |
0..* | Extension | Variable name for the new uuid. | |
| 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-extractAllocateId" | |
| value[x] |
1..1 | string | Value of extension | |
| Documentation for this format | ||||
This structure is derived from Extension
Summary
Simple Extension with the type string: Allocate a new uuid in a named variable for use in extraction. This is usually used to set the fullUrl for a resource in the output extraction bundle, and then referenced in other resources within that transaction bundle (via fhirpath expressions).
Maturity: 0
Other representations of profile: CSV, Excel, Schematron
| Id | Grade | Path(s) | Details | Requirements |
| 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() |
IG © 2022+ HL7 International / FHIR Infrastructure. Package hl7.fhir.uv.sdc#4.0.0 based on FHIR 4.0.1. Generated 2025-09-18
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