Current Build

Extension: precondition

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

URL for this extension:

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

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

Other preceding or concurrent observations that must be known to correctly interpret the the observation. For example an fiO2 measure taken alongside of a SpO2 measurement. See the Observation notes section for additional guidance.

Context of Use: Use on Element ID Observation

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

Extension Content

Summary

NameFlagsCard.TypeDescription & Constraintsdoco
.. precondition0..*Reference(Observation)URL = http://hl7.org/fhir/StructureDefinition/observation-precondition
precondition: Other preceding or concurrent observations that must be known to correctly interpret the the observation. For example an fiO2 measure taken alongside of a SpO2 measurement. See the Observation notes section for additional guidance.


Use on Element ID Observation

doco Documentation for this format

Full Structure

NameFlagsCard.TypeDescription & Constraintsdoco
.. extension0..*ExtensionURL = http://hl7.org/fhir/StructureDefinition/observation-precondition
precondition: Other preceding or concurrent observations that must be known to correctly interpret the the observation. For example an fiO2 measure taken alongside of a SpO2 measurement. See the Observation notes section for additional guidance.


Use on Element ID Observation
... extension 0..0
... url 1..1uri"http://hl7.org/fhir/StructureDefinition/observation-precondition"
... valueReference 0..1Reference(Observation)Value of extension

doco Documentation for this format

XML Template

<!-- precondition -->doco

<extension xmlns="http://hl7.org/fhir"
     url="http://hl7.org/fhir/StructureDefinition/observation-precondition" >
  <!-- from Element: extension -->
 <valueReference><!-- 0..1 Reference(Observation) Value of extension --></valueReference>
</extension>

JSON Template

{ // precondition
  // from Element: extension
    "extension" : [ //  sliced by value:url  in the specified order, Open ]
    "url" : "http://hl7.org/fhir/StructureDefinition/observation-precondition", // R! 
    "valueReference" : { Reference(Observation) } //Value of extension
  }

Summary

NameFlagsCard.TypeDescription & Constraintsdoco
.. precondition0..*Reference(Observation)URL = http://hl7.org/fhir/StructureDefinition/observation-precondition
precondition: Other preceding or concurrent observations that must be known to correctly interpret the the observation. For example an fiO2 measure taken alongside of a SpO2 measurement. See the Observation notes section for additional guidance.


Use on Element ID Observation

doco Documentation for this format

Full Structure

NameFlagsCard.TypeDescription & Constraintsdoco
.. extension0..*ExtensionURL = http://hl7.org/fhir/StructureDefinition/observation-precondition
precondition: Other preceding or concurrent observations that must be known to correctly interpret the the observation. For example an fiO2 measure taken alongside of a SpO2 measurement. See the Observation notes section for additional guidance.


Use on Element ID Observation
... extension 0..0
... url 1..1uri"http://hl7.org/fhir/StructureDefinition/observation-precondition"
... valueReference 0..1Reference(Observation)Value of extension

doco Documentation for this format

XML Template

<!-- precondition -->doco

<extension xmlns="http://hl7.org/fhir"
     url="http://hl7.org/fhir/StructureDefinition/observation-precondition" >
  <!-- from Element: extension -->
 <valueReference><!-- 0..1 Reference(Observation) Value of extension --></valueReference>
</extension>

JSON Template

{ // precondition
  // from Element: extension
    "extension" : [ //  sliced by value:url  in the specified order, Open ]
    "url" : "http://hl7.org/fhir/StructureDefinition/observation-precondition", // R! 
    "valueReference" : { Reference(Observation) } //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')]))