diff --git a/traits.dd b/traits.dd
index d27aa85108..c223a41aa8 100644
--- a/traits.dd
+++ b/traits.dd
@@ -21,6 +21,7 @@ $(GNAME TraitsKeyword):
     $(GBLINK isAssociativeArray)
     $(GBLINK isFinalClass)
     $(GBLINK isPOD)
+    $(GBLINK isNested)
     $(GBLINK isFloating)
     $(GBLINK isIntegral)
     $(GBLINK isScalar)
@@ -158,6 +159,15 @@ $(H2 $(GNAME isPOD))
 	$(P Takes one argument, which must be a type. It returns
 	$(B true) if the type is a $(XLINK2 glossary.html#pod, POD) type, otherwise $(B false).)
 
+$(H2 $(GNAME isNested))
+
+    $(P Takes one argument.
+    It returns $(B true) if the argument is a nested type which internally
+    stores a context pointer, otherwise it returns $(B false).
+    Nested types can be  $(XLINK2 class.html#nested, classes),
+    $(XLINK2 struct.html#nested, structs), and
+    $(XLINK2 function.html#variadicnested, functions).)
+
 $(H2 $(GNAME isVirtualFunction))
 
 	$(P The same as $(GLINK isVirtualMethod), except