len: one of the “interface differences” in the readme is:

“Custom query functions and aggregates should be passed as source instead of being referenced by symbol (due to lack of resolve in CLJS)”

although i haven’t tested it

(and calling it like (?namespace-fn ?attr))

I just posted a $USD300 bounty for a datascript issue: https://www.bountysource.com/issues/7853568-negation-and-disjunction-from-datomic

atroche: thanks a million that works

glad i could help 🙂