Extension: delta

Orders and Observations Work Group

Maturity Level: 1

Informative

Use Context: Any

URL for this extension:

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

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

Summary

Name	Flags	Card.	Type	Description & Constraints
delta		0..1	CodeableConcept	URL = 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 ID Observation
Documentation for this format

Full Structure

Name	Flags	Card.	Type	Description & Constraints
extension		0..1	Extension	URL = 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 ID Observation
extension	I	0..0
url		1..1	uri	"http://hl7.org/fhir/StructureDefinition/observation-delta"
value[x]	I	1..1	CodeableConcept	Value of extension
Documentation for this format

XML Template

<!-- delta -->

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

Summary

Name	Flags	Card.	Type	Description & Constraints
delta		0..1	CodeableConcept	URL = 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 ID Observation
Documentation for this format

Full Structure

Name	Flags	Card.	Type	Description & Constraints
extension		0..1	Extension	URL = 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 ID Observation
extension	I	0..0
url		1..1	uri	"http://hl7.org/fhir/StructureDefinition/observation-delta"
value[x]	I	1..1	CodeableConcept	Value of extension
Documentation for this format

XML Template

<!-- delta -->

<extension xmlns="http://hl7.org/fhir"
     url="http://hl7.org/fhir/StructureDefinition/observation-delta" >
  <!-- from Element: extension -->
 <valueCodeableConcept><!--  1..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 } // C? R! 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')]))
ele-1: On Extension.extension: All FHIR elements must have a @value or children (xpath on Extension.extension: @value|f:*|h:div)
ext-1: On Extension.extension: Must have either extensions or value[x], not both (xpath on Extension.extension: exists(f:extension)!=exists(f:*[starts-with(local-name(.), "value")]))
ele-1: On Extension.value[x]: All FHIR elements must have a @value or children (xpath on Extension.value[x]: @value|f:*|h:div)