<http://schema.org/description>
"About a month ago, we reported Google was testing classic Sitelinks, i.e. one line Sitelinks.  Well, now it seems like we can reproduce the single line Sitelinks.A Google Webmasters Help thread shows "^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.seroundtable.com/archives/019750.html>