Document NAMESPACE.

List-of-Navigators.md

@@ -14,6 +14,7 @@
     - [MAP-VALS](#map-vals)
     - [META](#meta)
     - [NAME](#name)
+    - [NAMESPACE](#namespace)
     - [NIL->LIST](#nil-list)
     - [NIL->SET](#nil-set)
     - [NIL->VECTOR](#nil-vector)
@@ -216,6 +217,17 @@ Navigates to the name of a keyword.
 ["a" "b" "c"]
 ```
 
+## NAMESPACE
+
+Navigates to the namespace of keywords or variables.
+
+```clojure
+=> (select [ALL NAMESPACE] [::test ::fun])
+["playground.specter" "playground.specter"]
+=> (select [ALL NAMESPACE] [::test :fun])
+["playground.specter" nil]
+```
+
 ## NIL->LIST
 
 `NIL->LIST` navigates to the empty list `'()` if the value is nil. Otherwise it stays at the current value.