Schema.org. Structured Data Testing Tool. Web Developer Tutorial: HTML5 Microdata. The HTML5 draft specification includes Microdata.
The Microdata spec provides a standardized syntax for additional semantic markup to your web pages to enhance the machine readability of your web pages. It’s purpose isn’t to make a new widget appear on your web page but to help automated programs like google understand and better handle the content of your web pages. HTML5 Microdata has the same basic mission as RDFa and Microformats but differs slightly in implementation and use. HTML5 microdata allows you at add structured markup to any HTML element that is bot-readable, standardized and won’t cause any problems with browsers that don’t support it. Webmaster Tools - Rich Snippets Testing Tool.
Product. Canonical URL: Thing > Product Any offered product or service.
For example: a pair of shoes; a concert ticket; the rental of a car; a haircut; or an episode of a TV show streamed online. Usage: Over 1,000,000 domains Instances of Product may appear as values for the following properties.