@nottmey bindings are only replaced with values at the first level

that is why the first works and the second does not, in the first the ?v is nested

@nottmey this is a better way: [(namespace ?v) ?v-ns] [(!= ?v-ns "db")]

see clojure name and namespace functions, don't use string ops to examine parts of symbols or keywords

@favila ahh, one needs to leverage the binding nature of datalog, clever. Thanks! I was confused, how you would negate your predicates then... (seems like a common thing) But I found, instead of [(not (predicate ...))], you use (not [(predicate ...)]). Also very handy.

you can also write your own predicate fn and use it using a fully-qualified name

if you need anything more complex