2.7.0 - STU 3 (2nd ballot)

This page is part of the Structured Data Capture FHIR IG (v2.7.0: STU 3 Ballot 2) based on FHIR R4. The current version which supercedes this version is 3.0.0. For a full list of available versions, see the Directory of published versions

Extension: CandidateExpressionExtension

The official URL for this extension is:

http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-candidateExpression

Status: draft
Extension maintained by: Health Level Seven International (Orders and Observations - Structured Data Capture)

A FHIRPath expression or FHIR Query that resolves to a list of candidate answers for the question item or that establishes context for a group item. The user may select from among the candidates to choose answers for the question.

Context of Use

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

  • {"type"=>"Questionnaire.item"}
  • {"type"=>"Questionnaire.item.item"}

Usage info

Yet to be done: xref

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

Fixed Value: 1 element

This structure is derived from Extension

NameFlagsCard.TypeDescription & Constraintsdoco
.. Extension 0..1Expression for possible answers
... url 1..1uri"http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-candidateExpression"
... valueExpression 0..1Expression

doco Documentation for this format
NameFlagsCard.TypeDescription & Constraintsdoco
.. Extension I0..1Expression for possible answers
... id 0..1stringUnique id for inter-element referencing
... extension 0..*ExtensionAdditional content defined by implementations
Slice: Unordered, Open by value:url
... url 1..1uri"http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-candidateExpression"
... valueExpression 0..1ExpressionValue of extension

doco Documentation for this format

This structure is derived from Extension

Summary

Fixed Value: 1 element

Differential View

This structure is derived from Extension

NameFlagsCard.TypeDescription & Constraintsdoco
.. Extension 0..1Expression for possible answers
... url 1..1uri"http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-candidateExpression"
... valueExpression 0..1Expression

doco Documentation for this format

Snapshot View

NameFlagsCard.TypeDescription & Constraintsdoco
.. Extension I0..1Expression for possible answers
... id 0..1stringUnique id for inter-element referencing
... extension 0..*ExtensionAdditional content defined by implementations
Slice: Unordered, Open by value:url
... url 1..1uri"http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-candidateExpression"
... valueExpression 0..1ExpressionValue of extension

doco Documentation for this format

 

Other representations of extension: Schematron

Terminology Bindings

Constraints

IdPathDetailsRequirements
ele-1ExtensionAll FHIR elements must have a @value or children
: hasValue() or (children().count() > id.count())
ext-1ExtensionMust have either extensions or value[x], not both
: extension.exists() != value.exists()