R4 Draft for Comment

This page is part of the FHIR Specification (v3.2.0: R4 Ballot 1). The current version which supercedes this version is 5.0.0. For a full list of available versions, see the Directory of published versions . Page versions: R4B R4 R3 R2

Extension: delta

Orders and Observations Work Group Maturity Level: 1InformativeUse Context: Any

URL for this extension: 

http://hl7.org/fhir/StructureDefinition/observation-delta

Status: draft. Extension maintained by: Health Level Seven, Inc. - FHIR WG

The qualitative change in the value relative to the previous measurement. Usually only recorded if the change is clinically significant.

Context of Use: Use on element: Observation

usage info: insert a list of places where this extension is used

Extension Content

Summary

NameFlagsCard.TypeDescription & Constraintsdoco
.. extension0..1CodeableConceptURL = http://hl7.org/fhir/StructureDefinition/observation-delta
delta: The qualitative change in the value relative to the previous measurement. Usually only recorded if the change is clinically significant.
Use on element: Observation

doco Documentation for this format

Full Structure

NameFlagsCard.TypeDescription & Constraintsdoco
.. extension0..1ExtensionURL = http://hl7.org/fhir/StructureDefinition/observation-delta
delta: The qualitative change in the value relative to the previous measurement. Usually only recorded if the change is clinically significant.
Use on element: Observation
... url 1..1uri"http://hl7.org/fhir/StructureDefinition/observation-delta"
... valueCodeableConcept 0..1CodeableConceptValue of extension

doco Documentation for this format

XML Template

<!-- delta -->doco

<extension xmlns="http://hl7.org/fhir"
     url="http://hl7.org/fhir/StructureDefinition/observation-delta" >
  <!-- from Element: extension -->
 <valueCodeableConcept><!-- 0..1 CodeableConcept 
     Value of extension --></valueCodeableConcept>
</extension>

JSON Template

{ // delta
  // from Element: extension
    "extension" : [ //  sliced by value:url  in the specified order, Open ]
    "url" : "http://hl7.org/fhir/StructureDefinition/observation-delta", // R! 
    "valueCodeableConcept" : { CodeableConcept } //Value of extension
  }

Summary

NameFlagsCard.TypeDescription & Constraintsdoco
.. extension0..1CodeableConceptURL = http://hl7.org/fhir/StructureDefinition/observation-delta
delta: The qualitative change in the value relative to the previous measurement. Usually only recorded if the change is clinically significant.
Use on element: Observation

doco Documentation for this format

Full Structure

NameFlagsCard.TypeDescription & Constraintsdoco
.. extension0..1ExtensionURL = http://hl7.org/fhir/StructureDefinition/observation-delta
delta: The qualitative change in the value relative to the previous measurement. Usually only recorded if the change is clinically significant.
Use on element: Observation
... url 1..1uri"http://hl7.org/fhir/StructureDefinition/observation-delta"
... valueCodeableConcept 0..1CodeableConceptValue of extension

doco Documentation for this format

XML Template

<!-- delta -->doco

<extension xmlns="http://hl7.org/fhir"
     url="http://hl7.org/fhir/StructureDefinition/observation-delta" >
  <!-- from Element: extension -->
 <valueCodeableConcept><!-- 0..1 CodeableConcept 
     Value of extension --></valueCodeableConcept>
</extension>

JSON Template

{ // delta
  // from Element: extension
    "extension" : [ //  sliced by value:url  in the specified order, Open ]
    "url" : "http://hl7.org/fhir/StructureDefinition/observation-delta", // R! 
    "valueCodeableConcept" : { CodeableConcept } //Value of extension
  }

 

Constraints

  • ele-1: All FHIR elements must have a @value or children (xpath: @value|f:*|h:div)
  • ext-1: Must have either extensions or value[x], not both (xpath: exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')]))