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[1] 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>

[2] Fix #208: remove the Microdata API · whatwg/html@2aaecb8 ( 版) <https://github.com/whatwg/html/commit/2aaecb89900b875b9ee8357fa8bccf48477358bb>