<http://digiphoto.techbang.com/posts/5340>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://digiphoto.techbang.com/posts/5340-olympus-released-om-d-e-m1-flagship-micro-monocular-however-ed-12-40mm-f28-pro-with-the-new-mirror>