History

Time	Change
2010-10-20 13:24:11+00:00	Associated with 名前空間ID
2010-10-20 13:24:11+00:00	Associated with 名前空間識別子
2010-10-20 13:24:11+00:00	Associated with Namespace ID
2011-09-18 03:38:22+00:00	Associated with URN//名前空間
2015-04-19 10:23:37+00:00	Associated with URN NID
2017-06-03 02:03:57+00:00	Associated with URN名前空間
2021-04-09 08:47:03+00:00	Associated with RFC 2611