R4 Ballot #1 (Mixed Normative/Trial use)

This page is part of the FHIR Specification (v3.3.0: R4 Ballot 2). The current version which supercedes this version is 5.0.0. For a full list of available versions, see the Directory of published versions

Extension: focus-code

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

URL for this extension: 

http://hl7.org/fhir/StructureDefinition/observation-focus-code

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

A code representing the focus of an observation when the focus is not the patient of record. In other words, the focus of the observation is different from Observation.subject. An example use case would be using the Observation resource to capture whether the mother is trained to change her child's tracheostomy tube. In this example, the child is the patient of record and the mother is focal subject referenced using this extension. Other example focal subjects include spouses, related persons, feti, or donors.

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
.. extension0..1CodeableConceptURL = http://hl7.org/fhir/StructureDefinition/observation-focus-code
focus-code: A code representing the focus of an observation when the focus is not the patient of record. In other words, the focus of the observation is different from Observation.subject. An example use case would be using the Observation resource to capture whether the mother is trained to change her child's tracheostomy tube. In this example, the child is the patient of record and the mother is focal subject referenced using this extension. Other example focal subjects include spouses, related persons, feti, or donors.


Binding: Focal Subject Codes (example)
Use on Element ID Observation

doco Documentation for this format

Full Structure

NameFlagsCard.TypeDescription & Constraintsdoco
.. extension0..1ExtensionURL = http://hl7.org/fhir/StructureDefinition/observation-focus-code
focus-code: A code representing the focus of an observation when the focus is not the patient of record. In other words, the focus of the observation is different from Observation.subject. An example use case would be using the Observation resource to capture whether the mother is trained to change her child's tracheostomy tube. In this example, the child is the patient of record and the mother is focal subject referenced using this extension. Other example focal subjects include spouses, related persons, feti, or donors.


Use on Element ID Observation
... url 1..1uri"http://hl7.org/fhir/StructureDefinition/observation-focus-code"
... valueCodeableConcept 0..1CodeableConceptValue of extension
Binding: Focal Subject Codes (example)

doco Documentation for this format

XML Template

<!-- focus-code -->doco

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

JSON Template

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

Summary

NameFlagsCard.TypeDescription & Constraintsdoco
.. extension0..1CodeableConceptURL = http://hl7.org/fhir/StructureDefinition/observation-focus-code
focus-code: A code representing the focus of an observation when the focus is not the patient of record. In other words, the focus of the observation is different from Observation.subject. An example use case would be using the Observation resource to capture whether the mother is trained to change her child's tracheostomy tube. In this example, the child is the patient of record and the mother is focal subject referenced using this extension. Other example focal subjects include spouses, related persons, feti, or donors.


Binding: Focal Subject Codes (example)
Use on Element ID Observation

doco Documentation for this format

Full Structure

NameFlagsCard.TypeDescription & Constraintsdoco
.. extension0..1ExtensionURL = http://hl7.org/fhir/StructureDefinition/observation-focus-code
focus-code: A code representing the focus of an observation when the focus is not the patient of record. In other words, the focus of the observation is different from Observation.subject. An example use case would be using the Observation resource to capture whether the mother is trained to change her child's tracheostomy tube. In this example, the child is the patient of record and the mother is focal subject referenced using this extension. Other example focal subjects include spouses, related persons, feti, or donors.


Use on Element ID Observation
... url 1..1uri"http://hl7.org/fhir/StructureDefinition/observation-focus-code"
... valueCodeableConcept 0..1CodeableConceptValue of extension
Binding: Focal Subject Codes (example)

doco Documentation for this format

XML Template

<!-- focus-code -->doco

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

JSON Template

{ // focus-code
  // from Element: extension
    "extension" : [ //  sliced by value:url  in the specified order, Open ]
    "url" : "http://hl7.org/fhir/StructureDefinition/observation-focus-code", // 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')]))