http://hl7.org/fhir/StructureDefinition/data-absent-reason|4.0.1
Provides a reason why the expected value or elements in the element that is extended are missing.
description: Provides a reason why the expected value or elements in the element that is extended are missing. derivation: constraint name: Data Absent Reason type: Extension elements: extension: {index: 0} url: pattern: {type: Uri, value: 'http://hl7.org/fhir/StructureDefinition/data-absent-reason'} index: 1 value: choices: [] index: 3 extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/StructureDefinition/data-absent-reason base: http://hl7.org/fhir/StructureDefinition/Extension version: 4.0.1 required: [value]