Structured Data Capture
4.0.0 - STU 4 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: Calculated Expression

Official URL: http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-calculatedExpression Version: 4.0.0
Standards status: Trial-use Maturity Level: 4 Computable Name: CalculatedExpressionExtension
Other Identifiers: OID:2.16.840.1.113883.4.642.40.17.42.17

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

Context of Use

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

    In addition, the extension can only be used when this FHIRPath expression is true:

    initial.exists().not()

Additional details on the use of this extension can be found on the Form Behavior page. For guidance on how calculatedExpression supports dynamic calculations based on other answers, refer to the Expressions page - calculatedExpression section.

Usage info

Usages:

You can also check for usages in the FHIR IG Statistics

Formal Views of Extension Content

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

This structure is derived from Extension

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Extension 0..1 Extension Expression-determined initial value
... extension 0..0
... url 1..1 uri "http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-calculatedExpression"
... value[x] 1..1 Expression Value of extension

doco Documentation for this format
NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Extension 0..1 Extension Expression-determined initial value
... 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-calculatedExpression"

doco Documentation for this format

This structure is derived from Extension

Summary

Simple Extension with the type Expression: Calculated value for a question answer as determined by an evaluated expression.

Maturity: 4

Differential View

This structure is derived from Extension

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Extension 0..1 Extension Expression-determined initial value
... extension 0..0
... url 1..1 uri "http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-calculatedExpression"
... value[x] 1..1 Expression Value of extension

doco Documentation for this format

Snapshot View

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Extension 0..1 Extension Expression-determined initial value
... 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-calculatedExpression"

doco Documentation for this format

This structure is derived from Extension

Summary

Simple Extension with the type Expression: Calculated value for a question answer as determined by an evaluated expression.

Maturity: 4

 

Other representations of profile: CSV, Excel, Schematron

Constraints

IdGradePath(s)DetailsRequirements
ele-1error**ALL** elementsAll FHIR elements must have a @value or children
: hasValue() or (children().count() > id.count())
ext-1error**ALL** extensionsMust have either extensions or value[x], not both
: extension.exists() != value.exists()