<https://goodereader.com/blog/reviews/onyx-boox-nova-air-c-review-the-best-7-8-color-e-note-in-the-world>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://goodereader.com/blog/reviews/onyx-boox-nova-air-c-review-the-best-7-8-color-e-note-in-the-world>