<http://schema.org/description>
"It always sucks to show up to a conference with a slide deck that looks lovely with lots of pictures and evocative hipster stock photography all nicely ... ..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.hanselman.com/blog/HowToConvertAPowerPointPresentationFrom43RatioTo169WithoutDistortedOrStretchedImages.aspx>