Microdata Primer Tutorial
Webpages can exist on the World Wide Web but that, as you probably realize yourself, does not guarantee that those web pages will be found by people using the web. There are a variety of methods to get these pages noticed “if that’s what you’re into” and the most obvious approach is to get noticed and indexed by the big search engines … Google, Yahoo, Bing. The acronym SEO (Search Engine Optimization) encompasses a great deal of this topic.
With HTML5 came Microdata Structured Data which is a specification of HTML allowing you to mix metadata in amongst your normal web content.
Google has a richsnippets testing area at Structured Data Testing Tool where you can try out some of the ideas you develop reading HTML5 Microdata tutorial.
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I like the single-row radio-play approach for keeping the controls compact while still making each selection clear. When I’m checking a calculation alongside a tutorial, I use StepStat to see the intermediate steps; how do you handle the layout when the playlist gets much longer?