[1] Web Applications 1.0 r4066 Update microdata based on results of usability study ( (2009-10-03 06:44:00 +09:00 版)) <http://html5.org/tools/web-apps-tracker?from=4065&to=4066>

[2] Fix #208: remove the Microdata API · whatwg/html@2aaecb8 (2015-10-07 20:12:50 +09:00 版) <https://github.com/whatwg/html/commit/2aaecb89900b875b9ee8357fa8bccf48477358bb>