Structured Data Testing Tool

"Structured data markup" is a standard way to annotate your content so machines can understand it. When your web pages include structured data markup, Google (and other search engines) can use that data to index your content better, present it more prominently in search results, and surface it in new experiences like voice answers, maps, and Google Now.
~~https://developers.google.com/structured-data/

See how the above code validates using the Google Structured Data Testing Tool - Click to validate above content