Structured Data Capture
4.0.0 - International flag

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

Extension: Extract Definition - Resource (legacy)

Official URL: http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-itemExtractionContext Version: 4.0.0
Standards status: Deprecated Retired as of 2025-10-22 Maturity Level: 0 Computable Name: ItemExtractionContextExtension
Other Identifiers: OID:2.16.840.1.113883.4.642.40.17.42.31

Specifies a query or other expression that identifies the resource (or set of resources for a repeating item) to be extracted from this item once the QuestionnaireResponse is complete. This extension is deprecated in favor of the DefinitionExtractExtension extension.

Context of Use

Note: This extension has been superceded by the definitionExtract extension. Please migrate to that extension, however this one will remain for backward compatibility.
This extension does not support defining a profile to create, and the expression (x-fhir-query) was not deemed sufficiently implementable.

Additional details on the use of this extension can be found on the Data Extraction page.

Usage info

Usages:

  • This Extension is not used by any profiles in this Implementation Guide

You can also check for usages in the FHIR IG Statistics

Formal Views of Extension Content

Description Differentials, Snapshots, and other representations.

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Extension 0..1 Extension Establishes mapping context for a Questionnaire item
... extension 0..0
... url 1..1 uri "http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-itemExtractionContext"
... value[x] 0..1 Value of extension
Binding: ResourceType (required): If value is of type 'code', then the extraction is always the creation of a new resource of the specified type.
.... valueCode code
.... valueExpression Expression

doco Documentation for this format

Terminology Bindings (Differential)

Path Status Usage ValueSet Version Source
Extension.value[x] Base required ResourceType 📦4.0.1 FHIR Std.
NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Extension 0..1 Extension Establishes mapping context for a Questionnaire item
... 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-itemExtractionContext"
.... valueCode code
.... valueExpression Expression

doco Documentation for this format

Terminology Bindings

Path Status Usage ValueSet Version Source
Extension.value[x] Base required ResourceType 📦4.0.1 FHIR Std.

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()

Summary

Simple Extension with the type code, Expression: Specifies a query or other expression that identifies the resource (or set of resources for a repeating item) to be extracted from this item once the QuestionnaireResponse is complete. This extension is deprecated in favor of the DefinitionExtractExtension extension.

Maturity: 0

Differential ViewDifferential View

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Extension 0..1 Extension Establishes mapping context for a Questionnaire item
... extension 0..0
... url 1..1 uri "http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-itemExtractionContext"
... value[x] 0..1 Value of extension
Binding: ResourceType (required): If value is of type 'code', then the extraction is always the creation of a new resource of the specified type.
.... valueCode code
.... valueExpression Expression

doco Documentation for this format

Terminology Bindings (Differential)

Path Status Usage ValueSet Version Source
Extension.value[x] Base required ResourceType 📦4.0.1 FHIR Std.

Snapshot View

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Extension 0..1 Extension Establishes mapping context for a Questionnaire item
... 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-itemExtractionContext"
.... valueCode code
.... valueExpression Expression

doco Documentation for this format

Terminology Bindings

Path Status Usage ValueSet Version Source
Extension.value[x] Base required ResourceType 📦4.0.1 FHIR Std.

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()

Summary

Simple Extension with the type code, Expression: Specifies a query or other expression that identifies the resource (or set of resources for a repeating item) to be extracted from this item once the QuestionnaireResponse is complete. This extension is deprecated in favor of the DefinitionExtractExtension extension.

Maturity: 0

 

Other representations of profile: CSV, Excel, Schematron