http://hl7.org/fhir/StructureDefinition/codesystem-expirationDate|4.0.1

The date when the value set version is no longer expected to be used to create new content. This is the first date-time when the value set version becomes Inactive, so this value MUST present on all Inactive value set versions. The start Date_time is expected to be as of 0001 UTC of the Expiration Date.

Structure JSON Dependencies FHIRSchema Other Versions Dependant (0)Elements Summary

description: The date when the value set version is no longer expected to be used to create new content. This is the first date-time when the value set version becomes Inactive, so this value MUST present on all Inactive value set versions. The start Date_time is expected to be as of 0001 UTC of the Expiration Date.
derivation: constraint
name: expirationDate
type: Extension
elements:
  extension: {index: 0}
  url:
    pattern: {type: Uri, value: 'http://hl7.org/fhir/StructureDefinition/codesystem-expirationDate'}
    index: 1
  value:
    choices: []
    index: 3
extensions: {}
class: extension
kind: complex-type
url: http://hl7.org/fhir/StructureDefinition/codesystem-expirationDate
base: http://hl7.org/fhir/StructureDefinition/Extension
version: 4.0.1
required: [value]