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Specification: http://www.whatwg.org/specs/web-apps/current-work/multipage/the-video-element.html Multipage: http://www.whatwg.org/C#the-track-element Complete: http://www.whatwg.org/c#the-track-element Comment: Example track elements for FR and DE contain the unnessasary lang attribute. Posted from: 86.171.129.60 User agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:16.0) Gecko/20100101 Firefox/16.0
It's not unnecessary, it's describing the language of the title="" attribute.