<http://digiphoto.techbang.com/posts/7634>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://digiphoto.techbang.com/posts/7634-three-generations-of-poor-photography-monocular-mistaken-for-life-5-let-you-leave-money-depth-of-compromise-suggestions>