<https://blog.pulse-solution.com/post/2020/11/12/15-ways-to-use-qr-codes-how-it-works>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://blog.pulse-solution.com/post/2020/11/12/15-ways-to-use-qr-codes-how-it-works>