description: Additional timestamp for the author or other elements. **Note:** This extension has its origin from CDA and is deprecated. It will be removed in a future version. package_name: ch.fhir.ig.ch-core derivation: constraint name: EPRTime type: Extension elements: extension: {index: 0} url: pattern: {type: Uri, value: 'http://fhir.ch/ig/ch-core/StructureDefinition/ch-ext-epr-time'} index: 1 value: choices: [valueDateTime] index: 3 valueDateTime: {type: dateTime, choiceOf: value, index: 4} package_version: 6.0.0 extensions: {} class: extension kind: complex-type url: http://fhir.ch/ig/ch-core/StructureDefinition/ch-ext-epr-time base: http://hl7.org/fhir/StructureDefinition/Extension version: 6.0.0 required: [valueDateTime, value]