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http://www.w3.org/html/wg/drafts/html/master/sections.html#rank "The two styles can be combined, for compatibility with legacy tools while still future-proofing for when that compatibility is no longer needed. This third snippet again has the same outline as the previous two:" but the third snippet is exactly as the second snippet.
HTML5.1 Bugzilla Bug Triage: Fixed https://github.com/w3c/html/pull/252 If this resolution is not satisfactory, please copy the relevant bug details/proposal into a new issue at the W3C HTML5 Issue tracker: https://github.com/w3c/html/issues/new where it will be re-triaged. Thanks!