description: Base StructureDefinition for Period Type package_name: hl7.fhir.r2b.core derivation: specialization name: Period type: null elements: start: isModifier: false short: Starting time with inclusive boundary index: 0 comments: If the low element is missing, the meaning is that the low boundary is not known. type: dateTime mustSupport: false maxLength: 0 base: {max: '1', min: 0, path: Period.start} isSummary: true end: isModifier: false short: End time with inclusive boundary, if not ongoing index: 1 comments: The high value includes any matching date/time. i.e. 2012-02-03T10:00:00 is in a period that has a end value of 2012-02-03. type: dateTime mustSupport: false meaningWhenMissing: If the end of the period is missing, it means that the period is ongoing maxLength: 0 base: {max: '1', min: 0, path: Period.end} isSummary: true package_version: 1.4.0 class: datatype kind: datatype url: http://hl7.org/fhir/StructureDefinition/Period base: http://hl7.org/fhir/StructureDefinition/Element version: null