<http://schema.org/description>
"Google today launched separate add-on stores for its Google Docs and Sheets products. You can check out the two stores here: Docs and Sheets.\r\n\r\nTo browse add-ons directly without navigating ..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://thenextweb.com/apps/2014/03/11/google-launches-add-stores-google-docs-sheets/>