<https://forum.staemme.ch/index.php?threads/d-f-vs-kg.10802/>
<http://schema.org/dateModified>
"2022-06-17T10:13:38+00:00"^^<http://schema.org/Date>
<https://forum.staemme.ch/index.php?threads/d-f-vs-kg.10802/page-4#post-189792>