description: Extension to define the timestamp of the authorship/data input package_name: ch.fhir.ig.ch derivation: constraint name: EPRTime type: Extension elements: extension: {index: 0} url: type: uri pattern: {type: Uri, value: 'http://fhir.ch/ig/ch-core/StructureDefinition/ch-ext-epr-time'} index: 1 valueDateTime: {type: dateTime, short: Value of extension, index: 2} package_version: core-0.1.0 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: 0.1.0 required: [valueDateTime]