XQuery

xs:date

The primitive type xs:date represents a date of the Gregorian calendar. The lexical representation of xs:date is YYYY-MM-DD where YYYY represents the year, MM the month, and DD the day. The year value has to be at least four digits, but it can be more than four digits to represent years later than 9999. However, XQuery implementations are not required to support more than four digits. A preceding minus sign (-) can be used to represent years before 0001. A time zone can be added to the end, as described in "Time Zones" in Chapter 19.

Values of type xs:date can be cast to and from xs:dateTime, as described in the section on xs:dateTime. You can obtain the current date using the current-date function, which returns a value of type xs:date.

Table B-3 lists some values of the xs:date type. For more information on working with dates, see Chapter 19.

Table B-3. Values of the xs:date type

Values	Explanation
Valid
2006-05-03	May 3, 2006
2006-05-03-05:00	May 3, 2006, U.S. Eastern Standard Time, which is five hours behind Coordinated Universal Time (UTC)
2006-05-03Z	May 3, 2006, Coordinated Universal Time (UTC)
Invalid
2006/05/03	Slashes are not allowed as separators
05-03-2006	The value must be in YYYY-MM-DD order
2006-09-31	The date must be valid (September has 30 days)
	An empty value or zero-length string is not permitted