<http://schema.org/description>
"Warning, this is long but full of info. Read it all. Often folks want to dynamically generate stuff with ASP.NET. The want to dynamically generate PDFs, GIFs, ... ..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.hanselman.com/blog/BackToBasicsDynamicImageGenerationASPNETControllersRoutingIHttpHandlersAndRunAllManagedModulesForAllRequests.aspx>