functionsince v0.0-927 clojure.core/descendantsEdit
(descendants tag)
(descendants h tag)

See Also:

Source docstring:
Returns the immediate and indirect children of tag, through a
relationship established via derive. h must be a hierarchy obtained
from make-hierarchy, if not supplied defaults to the global
hierarchy. Note: does not work on JavaScript type inheritance
Source code @ clojurescript:src/main/cljs/cljs/core.cljs
(defn descendants
  ([tag] (descendants @(get-global-hierarchy) tag))
  ([h tag] (not-empty (get (:descendants h) tag))))