Mozilla’s Tantek Çelik discusses how new HTML5 elements and microformats offer a simple way to represent web data without additional URLs, file formats, or callbacks. Microformats2 and HTML5 improvements bring better accessibility, simpler markup, improved semantics, and a direct mapping to JSON APIs for data consumers.
Tantek’s slides are here: http://tantek.com/presentations/2013/07/microformats2/