FHIR Extensions Pack
5.1.0 - 5.1.0 (April 2024) International flag

This page is part of the FHIR Core Extensions Registry (v5.1.0: Release 5.1) based on FHIR (HL7® FHIR® Standard) v5.0.0. This is the current published version. For a full list of available versions, see the Directory of published versions

Extension: Is Empty List

Official URL: http://hl7.org/fhir/StructureDefinition/cqf-isEmptyList Version: 5.1.0
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):

  • Element ID base64Binary
  • Element ID boolean
  • Element ID canonical
  • Element ID code
  • Element ID date
  • Element ID dateTime
  • Element ID decimal
  • Element ID id
  • Element ID instant
  • Element ID integer
  • Element ID markdown
  • Element ID oid
  • Element ID positiveInt
  • Element ID string
  • Element ID time
  • Element ID unsignedInt
  • Element ID uri
  • Element ID url
  • Element ID uuid
  • Element ID Address
  • Element ID Age
  • Element ID Annotation
  • Element ID Attachment
  • Element ID CodeableConcept
  • Element ID Coding
  • Element ID ContactPoint
  • Element ID Count
  • Element ID Distance
  • Element ID Duration
  • Element ID HumanName
  • Element ID Identifier
  • Element ID Money
  • Element ID Period
  • Element ID Quantity
  • Element ID Range
  • Element ID Ratio
  • Element ID Reference
  • Element ID SampledData
  • Element ID Signature
  • Element ID Timing
  • Element ID ContactDetail
  • Element ID DataRequirement
  • Element ID Expression
  • Element ID ParameterDefinition
  • Element ID RelatedArtifact
  • Element ID TriggerDefinition
  • Element ID UsageContext
  • Element ID Dosage
  • Element ID Meta

Usage info

Usage:

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

Changes since version 1.0.0:

  • No changes

    • 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()

    Search Parameters for this Extension

    (none found)