[1] Protocols and Formats Working Group Public Page ( 版) <http://www.w3.org/WAI/PF/>
[2] IRC logs: freenode / #whatwg / 20140724 ( ( 版)) <http://krijnhoetmer.nl/irc-logs/whatwg/20140724>
[3] Suggestions for opening up PF (Steve Faulkner 著, 版) <https://lists.w3.org/Archives/Public/www-archive/2015Apr/0018.html>
[4] Media Accessibility User Requirements ( ( 版)) <http://www.w3.org/TR/2015/NOTE-media-accessibility-reqs-20151203/>