http://hosi.org/ts/When/CalendarTypes/Gregorian
ts:label
http://hosi.org/When/BasicTypes/M17n/Christian::Gregorian
ts:referenceFrame
http://hosi.org/When/TM/CalendarEra/Japanese
http://hosi.org/When/TM/CalendarEra/Japanese::明治
http://hosi.org/When/TM/CalendarEra/Japanese::大正
http://hosi.org/When/TM/CalendarEra/Japanese::昭和
http://hosi.org/When/TM/CalendarEra/Japanese::平成