[1] [CITE@en[High Resolution Time]]
( ([TIME[2012-03-13 02:35:59 +09:00]] 版))
<http://www.w3.org/TR/2012/WD-hr-time-20120313/>

[2] [CITE@en[High Resolution Time]]
( ([TIME[2012-12-13 06:52:10 +09:00]] 版))
<http://www.w3.org/TR/2012/REC-hr-time-20121217/>