Period
type: Class
definition: A period of time (e.g. a month, quarter or year).
object nature: value
term status: proposed

end date
type: DatatypeProperty
domain includes: Period
range includes: date
range includes: dateTime
definition: The end date, or date and time, of the period.
term status: proposed

period information
type: DatatypeProperty
domain includes: Period
range includes: string
definition: A textual description of the period.
term status: proposed

start date
type: DatatypeProperty
domain includes: Period
range includes: dateTime
range includes: date
definition: The start date, or date and time, of the period.
term status: proposed