<http://schema.org/description>
"The Google Webmaster Central blog announced the release of a new Google Sitemaps generator available at code.google.com/p/googlesitemapgenerator.The new tool works differently then other sitemaps tool"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.seroundtable.com/archives/019206.html>