description: The Last External Facing Date package_name: ca.on.health.idms derivation: constraint name: LastExternalDate type: Extension elements: url: pattern: {type: uri, value: 'https://health.gov.on.ca/idms/fhir/StructureDefinition/LastExternalDate'} type: uri index: 0 value: choices: [valueDateTime] index: 2 valueDateTime: {type: dateTime, choiceOf: value, index: 3} package_version: 1.0.9 class: extension kind: complex-type url: https://health.gov.on.ca/idms/fhir/StructureDefinition/LastExternalDate base: http://hl7.org/fhir/StructureDefinition/Extension version: 1.0.0 required: [value, valueDateTime]