<http://schema.org/topics>
"blogging,contributor,css tricks,design,Dev &amp; Design,display,features,Mashable,Twitter,resources,tutorial,tutorials,Twitter Lists,web,web design,web design series,web layout,website,widget,widgets,WordPress"^^<http://www.w3.org/2001/XMLSchema#string>
<http://mashable.com/2010/06/09/twitter-update-display-resources/>