http://hl7.org/fhir/StructureDefinition/Period|4.0.1

Base StructureDefinition for Period Type: A time period defined by a start and end date and optionally time.
typedestination
baseDefinitionhttp://hl7.org/fhir/StructureDefinition/Element
typehttp://hl7.org/fhir/StructureDefinition/Period
Period.start.typehttp://hl7.org/fhir/StructureDefinition/dateTime
Period.end.typehttp://hl7.org/fhir/StructureDefinition/dateTime