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: Is Empty List

Official URL: http://hl7.org/fhir/StructureDefinition/cqf-isEmptyList Version: 5.2.0-ballot
Standards status: Trial-use Maturity Level: 1 Responsible: HL7 International / Clinical Decision Support Computable Name: IsEmptyList

Indicates that the value of the parameter is an empty list. Because the parameter element of a Parameters resource must have a value, the value element must be present with either an actual value, or an extension, this extension supports the case when the actual parameter value being represented is an empty list. The type of the value element used should be appropriate to the element type of the list-valued expression.

Context of Use

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

Usage info

Usage:

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

Changes since version 1.0.0:

  • New Content

    • 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 boolean: Indicates that the value of the parameter is an empty list. Because the parameter element of a Parameters resource must have a value, the value element must be present with either an actual value, or an extension, this extension supports the case when the actual parameter value being represented is an empty list. The type of the value element used should be appropriate to the element type of the list-valued expression.

    Maturity: 1

    This structure is derived from Extension

    NameFlagsCard.TypeDescription & Constraintsdoco
    .. Extension 0..1 Extension Empty list
    ... url 1..1 uri "http://hl7.org/fhir/StructureDefinition/cqf-isEmptyList"
    ... value[x] 1..1 boolean Value of extension
    Fixed Value: true

    doco Documentation for this format
    NameFlagsCard.TypeDescription & Constraintsdoco
    .. Extension 0..1 Extension Empty list
    ... id 0..1 id Unique id for inter-element referencing
    ... extension 0..* Extension Additional content defined by implementations
    Slice: Unordered, Open by value:url
    ... url 1..1 uri "http://hl7.org/fhir/StructureDefinition/cqf-isEmptyList"

    doco Documentation for this format

    This structure is derived from Extension

    Summary

    Simple Extension of type boolean: Indicates that the value of the parameter is an empty list. Because the parameter element of a Parameters resource must have a value, the value element must be present with either an actual value, or an extension, this extension supports the case when the actual parameter value being represented is an empty list. The type of the value element used should be appropriate to the element type of the list-valued expression.

    Maturity: 1

    Differential View

    This structure is derived from Extension

    NameFlagsCard.TypeDescription & Constraintsdoco
    .. Extension 0..1 Extension Empty list
    ... url 1..1 uri "http://hl7.org/fhir/StructureDefinition/cqf-isEmptyList"
    ... value[x] 1..1 boolean Value of extension
    Fixed Value: true

    doco Documentation for this format

    Snapshot View

    NameFlagsCard.TypeDescription & Constraintsdoco
    .. Extension 0..1 Extension Empty list
    ... id 0..1 id Unique id for inter-element referencing
    ... extension 0..* Extension Additional content defined by implementations
    Slice: Unordered, Open by value:url
    ... url 1..1 uri "http://hl7.org/fhir/StructureDefinition/cqf-isEmptyList"

    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()

    R4B

    The extension is unchanged in R4B

    R4

    The extension is unchanged in R4

    R3

    The extension is unchanged in R3

    Search Parameters for this Extension

    (none found)