“Schema.org is a collaborative, community activity with a mission to create, maintain, and promote schemas for structured data on the Internet, on web pages, in email messages, and beyond.”
This shared vocabulary from Google, Bing and Yahoo helps to understand your content!
This shows how to associate your logo with your organization.
BEFORE
<a href="http://www.yoursite.com/"> <img src="http://www.yoursite.com/your_logo.jpg" alt="Your logo" /> </a>
AFTER
<div itemscope itemtype="http://schema.org/Organization"> <a itemprop="url" href="http://www.yoursite.com/"> <img itemprop="logo" src="http://www.yoursite.com/yourlogo.jpg" alt="Your wonderful logo"/> </a> </div>
