[1]
[CITE@en-US[Internationalization Tag Set (ITS) Version 1.0]] ([TIME[2007-04-03 18:11:18 +09:00]] 版) <http://www.w3.org/TR/2007/REC-its-20070403/>

[2] [CITE@en-US[Internationalization Tag Set (ITS) Version 2.0]]
( ([TIME[2012-08-28 04:37:48 +09:00]] 版))
<http://www.w3.org/TR/2012/WD-its20-20120829/>

[3] [CITE@en-US[Internationalization Tag Set (ITS) Version 2.0]]
( ([TIME[2012-06-23 03:53:03 +09:00]] 版))
<http://www.w3.org/TR/2012/WD-its20-20120626/>