<http://schema.org/description>
"I believe there are two new features now in Google Webmaster Tools.  They are the ability to test sitemaps before submitting them to Google and  testing crawlers specifically for Googlebot-Mobile.Test"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.seroundtable.com/google-webmaster-tools-testing-14639.html>