description: This describes the date when a prescription was last issued. package_name: fhir.r4.ukcore.stu2 derivation: constraint name: ExtensionUKCoreMedicationStatementLastIssueDate type: Extension elements: url: pattern: {type: uri, value: 'https://fhir.hl7.org.uk/StructureDefinition/Extension-UKCore-MedicationStatementLastIssueDate'} type: uri index: 0 value: short: The date when a prescription was last issued choices: [valueDateTime] index: 2 valueDateTime: {type: dateTime, short: The date when a prescription was last issued, choiceOf: value, index: 3} package_version: 2.0.1 class: extension kind: complex-type url: https://fhir.hl7.org.uk/StructureDefinition/Extension-UKCore-MedicationStatementLastIssueDate base: http://hl7.org/fhir/StructureDefinition/Extension version: 2.1.0 required: [value, valueDateTime]