Thank you, Tom.
This document might help answer some of the understandable confusion
behind Hendrik's question:
https://www.neilvandyke.org/racket/sxml-intro/
A clarification on credit where it's due: John Clements did considerable
work to clean up and document Oleg Kiselyov's various SXML packages for
modern Racket, and maintains those.
I wrote a few other SXML-based packages:
https://www.neilvandyke.org/racket/
If anyone has a deep-pocketed commercial need for some new HTML or XML
libraries for Racket, I might have some consulting time available, but
haven't had time for pro bono work lately.
(I'm not normally on racket-users; if anything I should see, please
email me directly.)