FHIR Extensions Pack
5.2.0-ballot - 5.2.0 Ballot - September 2024) International flag

FHIR Extensions Pack, published by HL7 International / FHIR Infrastructure. This guide is not an authorized publication; it is the continuous build for version 5.2.0-ballot built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7/fhir-extensions/ and changes regularly. See the Directory of published versions

Extension: Initial value

Official URL: http://hl7.org/fhir/StructureDefinition/cqf-initialValue Version: 5.2.0-ballot
Standards status: Trial-use Maturity Level: 3 Responsible: HL7 International / Clinical Decision Support Computable Name: InitialValue
Other Identifiers: OID:2.16.840.1.113883.4.642.5.1698

An expression that determines an initial value for the element on which it appears. The expression may be simply the name of a expression in a referenced library, or it may be a complete inline expression.

This extension supports providing an expression that determines a calculated value for an element, but one that is only appropriate as the initial value (e.g. the calculated value that should be used when a form is first displayed to capture the information in the resource, as opposed to the cqf-calculatedValue extension, which provides the calculated value for an element whenever any change is made to the values of the resource).

Context of Use

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

  • Element ID Element

Usage info

Usage:

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

Changes since version 1.0.0:

  • The resource metadata has changed (publisher, description, purpose)

    • 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

    Simple Extension of type Expression: An expression that determines an initial value for the element on which it appears. The expression may be simply the name of a expression in a referenced library, or it may be a complete inline expression.

    Maturity: 3

    This structure is derived from Extension

    NameFlagsCard.TypeDescription & Constraintsdoco
    .. Extension 0..* Extension An initial value expression
    ... extension 0..0
    ... url 1..1 uri "http://hl7.org/fhir/StructureDefinition/cqf-initialValue"
    ... value[x] 1..1 Expression Value of extension

    doco Documentation for this format
    NameFlagsCard.TypeDescription & Constraintsdoco
    .. Extension 0..* Extension An initial value expression
    ... id 0..1 id Unique id for inter-element referencing
    ... extension 0..0
    ... url 1..1 uri "http://hl7.org/fhir/StructureDefinition/cqf-initialValue"

    doco Documentation for this format

    This structure is derived from Extension

    Summary

    Simple Extension of type Expression: An expression that determines an initial value for the element on which it appears. The expression may be simply the name of a expression in a referenced library, or it may be a complete inline expression.

    Maturity: 3

    Differential View

    This structure is derived from Extension

    NameFlagsCard.TypeDescription & Constraintsdoco
    .. Extension 0..* Extension An initial value expression
    ... extension 0..0
    ... url 1..1 uri "http://hl7.org/fhir/StructureDefinition/cqf-initialValue"
    ... value[x] 1..1 Expression Value of extension

    doco Documentation for this format

    Snapshot View

    NameFlagsCard.TypeDescription & Constraintsdoco
    .. Extension 0..* Extension An initial value expression
    ... id 0..1 id Unique id for inter-element referencing
    ... extension 0..0
    ... url 1..1 uri "http://hl7.org/fhir/StructureDefinition/cqf-initialValue"

    doco Documentation for this format

     

    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()

    Search Parameters for this Extension

    (none found)