<http://schema.org/description>
"Yesterday, Matt Cutts, Google's head of search spam, posted another video on links clearly telling widget makers and those who embed  widgets on their own sites that those links should be nofollowed.H"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.seroundtable.com/google-nofollow-widget-links-17217.html>