[1] [CITE@en-US[Extended Date/Time Format (EDTF) 1.0 Submission]]
( ([TIME[2012-09-12 00:28:54 +09:00]] 版))
<http://www.loc.gov/standards/datetime/pre-submission.html>

[2] [CITE@en-us[Extended Date Time Format (Library of Congress)]]
( ([TIME[2012-10-31 22:06:22 +09:00]] 版))
<http://www.loc.gov/standards/datetime/>