<http://schema.org/description>
"Valve sent out an email to members of the press announcing its upcoming Steam  Dev Days conference, a two-day event for video game professionals to  satisfy their geek in a relaxed, off the record environment."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.maximumpc.com/valve-invites-developers-come-test-drive-prototype-steam-machines2013/>