* 歴史
[REFS[
- [1] [CITE@en[(X)HTML5 Tracking]]
([TIME[2009-10-23 23:16:19 +09:00]] 版)
]REFS]
[3] >>1 で [DFN[[CODE(HTMLe)@en[[[itemref]]]] [[要素]]]]と [DFN[[CODE(HTMLa)@en[[[refid]]]] [[属性]]]]は
[CODE(HTMLa)@en[[[itemref]]]] [[属性]]に改められました。
[2] [CITE[''''''[''''''whatwg'''''']'''''' Recursion and loops of Microdata items]]
( ([TIME[2011-06-09 08:32:45 +09:00]] 版))
[4] [CITE@en[Web Applications 1.0 r4066 Update microdata based on results of usability study]]
( ([TIME[2009-10-03 06:44:00 +09:00]] 版))
[5] [CITE@en[Web Applications 1.0 r4273 Change to itemref='', to simplify processing.]]
( ([TIME[2009-10-23 08:27:00 +09:00]] 版))