PUBLIC MARKS from ghis with tags html5 & support

Appendix A of Dive Into HTML5 to detect support for HTML5 in browsers

"You may well ask: “How can I start using HTML5 if older browsers don’t support it?” But the question itself is misleading. HTML5 is not one big thing; it is a collection of individual features. So you can’t detect “HTML5 support,” because that doesn’t make any sense. But you can detect support for individual features, like canvas, video, or geolocation."