[3] XPath and XQuery Functions and Operators 3.0
( ( 版))
http://www.w3.org/TR/xpath-functions-3/#lang-cal-place
[4] XPath and XQuery Functions and Operators 3.1 () https://www.w3.org/TR/2017/REC-xpath-functions-31-20170321/#lang-cal-place
default calendar
[1] XQuery 3.1: An XML Query Language
()
https://www.w3.org/TR/2017/REC-xquery-31-20170321/#dt-default-calendar
[2] XML Path Language (XPath) 3.1
()
https://www.w3.org/TR/2017/REC-xpath-31-20170321/#dt-default-calendar
関連
[5] 計算機システムにおける暦の指定も参照。