ref
要素itemref
要素[17]
>>16 >>15 usability study の 003 版までは itemref
要素はなく、
004 版で導入された。
itemref
属性[3] >>1 で itemref
要素と refid
属性は
itemref
属性に改められました。
[2] [whatwg] Recursion and loops of Microdata items ( ( 版)) http://lists.whatwg.org/htdig.cgi/whatwg-whatwg.org/2011-June/031965.html
[4] Web Applications 1.0 r4066 Update microdata based on results of usability study ( ( 版)) http://html5.org/tools/web-apps-tracker?from=4065&to=4066
[5] Web Applications 1.0 r4273 Change <itemref> to itemref='', to simplify processing. ( ( 版)) http://html5.org/tools/web-apps-tracker?from=4272&to=4273
[6] Fix #208: remove the Microdata API · whatwg/html@2aaecb8 ( 版) https://github.com/whatwg/html/commit/2aaecb89900b875b9ee8357fa8bccf48477358bb
[7] Editorial: synchronize with the DOM Standard · whatwg/html@21c6ec7 ( 版) https://github.com/whatwg/html/commit/21c6ec77594eb89b836d4872222f5916910967fd
[8] dfn what it means for elements to be “referenced” (sideshowbarker著, ) https://github.com/whatwg/html/commit/d0872abf29373f284c93434875e2e30d12602081