I was a bit puzzled by the :req-un / :opt-un stuff in maps. Am I right that 
there is a requirement here for the keys to be namespaced but the actual 
namespace is completely irrelevant / ignored?

(defn thing [m]
  (+ (:a m) (:b m) (or (:c m) 1)))
(s/fdef thing
        :args (s/cat :map (s/and (s/keys :req-un [:x/a :y/b]
                                         :opt-un [:z/c])
                                 (s/map-of keyword? number?)))
        :ret  number?)

I tried several namespace prefixes here and it seemed I can use anything and 
they don’t even need to be consistent.

Wouldn’t it be easier to just allow un-namespaced keywords here? Or is there 
some aspect of the namespacing here that I’m missing?

Sean Corfield -- (904) 302-SEAN
An Architect's View -- http://corfield.org

From: Rich Hickey

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