If you're interested, this is the general structure and access method of the 'tr...

If you're interested, this is the general structure and access method of the 'trie' data structure.

http://en.wikipedia.org/wiki/Trie

Also, Clojure has a nice functions called get-in and friends:

    user=> (def x {:a 1 :b 'B' :c { :x "X" :y "Y" :z "Z" } 
                   :d [{:p "P"} {:q "Q"} {:r "R"}] })
    #'user/x
    user=> (get-in x [:d 1 :q])
    "Q"
    user=> (assoc-in x [:d 1 :q] "QQ")
    {:a 1, :c {:z "Z", :y "Y", :x "X"}, :b B', :d [{:p "P"} {:q "QQ"} {:r "R"}]}