description: This extension indicates when the information in the document was verified. package_name: rs/hl7.fhir.us.core derivation: constraint name: USCoreAuthenticationTimeExtension type: Extension elements: extension: {index: 0} url: pattern: {type: uri, value: 'http://hl7.org/fhir/us/core/StructureDefinition/us-core-authentication-time'} type: uri index: 1 value: choices: [valueDateTime] index: 3 valueDateTime: {type: dateTime, choiceOf: value, index: 4} package_version: 8.0.0 extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/us/core/StructureDefinition/us-core-authentication-time base: http://hl7.org/fhir/StructureDefinition/Extension version: 8.0.0 required: [value, valueDateTime]