Date Time
The format of the date time element shall be represented in accordance with ISO8601:2000:
YYYY[-MM][-DD[Thh[:mm[:ss[.s[TZD]]]]]]]
Where:At least the four-digit year must be present. If additional parts of the DateTime are included, the character literals -, T, : and . are part of the character lexical representation for the date time.
Example: 2002-12-12