<http://schema.org/url>
<http://gigaom.com/2012/01/19/apple-unveils-ibooks-author-a-mac-app-for-easy-interactive-e-book-authoring/>
<http://gigaom.com/2012/01/19/apple-unveils-ibooks-author-a-mac-app-for-easy-interactive-e-book-authoring/>