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

{description: 'Base StructureDefinition for dateTime Type: A date, date-time or partial date (e.g. just year or year + month).  If hours and minutes are specified, a time zone SHALL be populated. The format is a union of the schema types gYear, gYearMonth, date and dateTime. Seconds must be provided due to schema type constraints but may be zero-filled and may be ignored.                 Dates SHALL be valid dates.', derivation: specialization, name: dateTime, type: dateTime, class: primitive-type, kind: primitive-type, url: 'http://hl7.org/fhir/StructureDefinition/dateTime', base: 'http://hl7.org/fhir/StructureDefinition/Element', version: 4.0.1}