I am creating a xml that has a field that requires a format this way: '20111107T15:01:04-03:00'
The documentation tells:
A combination Date and Time. Note the presence of a “T” character between the date and time portions, and the use of colons to separate hours, minutes, and seconds.
// These are as per ISO 8601.Datetime Format: YYYYMMDDTHH:MM:SS[[+-]HH:MM]? (the first MM is Datetime Format: YYYYMMDDTHH:MM:SS[[+-]HH:MM]
for date and time it is ok for me. But I didn't understand this part [[+-]HH:MM]
what is it?