<https://www.wowhead.com/news/patch-5-4-hotfixes-for-september-19th-proving-grounds-and-droplet-of-yshaarj-220304>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://ptr.wowhead.com/news/patch-5-4-hotfixes-for-september-19th-proving-grounds-and-droplet-of-yshaarj-220304>