This page is part of the Structured Data Capture FHIR IG (v3.0.0: STU 3) based on FHIR R4. This is the current published version. For a full list of available versions, see the Directory of published versions

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Extension: Initial Expression

Official URL: http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-initialExpression				Version: 3.0.0
Standards status: Trial-use			Maturity Level: 3	Computable Name: InitialExpressionExtension

Initial value for a question answer as determined by an evaluated expression.

Context of Use

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

• Questionnaire.item
• ElementDefinition

Usage info

Usage:

• Use this Extension: Advanced Behavior Questionnaire, Extractable Questionnaire - Definition, Populatable Questionnaire - Expression
• Examples for this Extension: Parameters/sdc-modular-root-assembled, DemographicExample, SDCAdvancedRenderingExample, FhirPathPrepopSimple, FhirPathPrepopSourceQuery, QuestionnaireSDCModularContact, QuestionnaireSDCModularName, SDCQuestionLibrary

Formal Views of Extension Content

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

 

Other representations of profile: CSV, Excel, Schematron

Constraints

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