http://hl7.org/fhir/StructureDefinition/artifact-periodDuration|5.2.0
Specifies the duration of the period, based on the starting date, rather than specifying the end date of the period.
description: Specifies the duration of the period, based on the starting date, rather than specifying the end date of the period. derivation: constraint name: PeriodDuration type: Extension elements: extension: {index: 0} url: pattern: {type: Uri, value: 'http://hl7.org/fhir/StructureDefinition/artifact-periodDuration'} index: 1 value: choices: [] index: 3 extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/StructureDefinition/artifact-periodDuration base: http://hl7.org/fhir/StructureDefinition/Extension version: 5.2.0 required: [value]