scope:

ISO 8601:2004 is applicable whenever representation of dates in the Gregorian calendar, times in the 24-hour timekeeping system, time intervals and recurring time intervals or of the formats of these representations are included in information interchange. It includes____
________calendar dates expressed in terms of calendar year, calendar month and calendar day of the month;_________ordinal dates expressed in terms of calendar year and calendar day of the year;_________week dates expressed in terms of calendar year, calendar week number and calendar day of the week;_________local time based upon the 24-hour timekeeping system;_________Coordinated Universal Time of day;_________local time and the difference from Coordinated Universal Time;_________combination of date and time of day;_________time intervals;_________recurring time intervals.__________
___ISO 8601:2004 does not cover dates and times where words are used in the representation and dates and times where characters are not used in the representation.
ISO 8601:2004 does not assign any particular meaning or interpretation to any data element that uses representations in accordance with ISO 8601:2004. Such meaning will be determined by the context of the application.