These are public posts tagged with #xtql. You can interact with them if you have an account anywhere in the fediverse.
At some point (I missed the memo) #xtdb stopped espousing #datalog and invented #xtql. I'm guessing this was to step out of any annoying dependencies of datalog and dampen comparison with the other major datalog approaches in #Clojure.
https://docs.xtdb.com/intro/what-is-xtql.html I especially enjoy the side-by-side Clojure/JSON comparisons here