description: Supports the date that the allergy was no longer valid. package_name: gpc.stu3.fhir derivation: constraint name: Extension-CareConnect-GPC-AllergyIntoleranceEndDate-1 type: Extension elements: url: pattern: {type: Uri, value: 'https://fhir.nhs.uk/STU3/StructureDefinition/Extension-CareConnect-GPC-AllergyIntoleranceEndDate-1'} index: 0 valueDateTime: type: dateTime short: Allergy end date index: 1 slicing: slices: valueDateTime: match: {} schema: {type: dateTime, short: Allergy end date, index: 1} package_version: assets-1.1.0 class: extension kind: complex-type url: https://fhir.nhs.uk/STU3/StructureDefinition/Extension-CareConnect-GPC-AllergyIntoleranceEndDate-1 base: http://hl7.org/fhir/StructureDefinition/Extension version: 1.0.0