Index: 06_feature/query/functions.html
===================================================================
--- 06_feature/query/functions.html	(revision 32992)
+++ 06_feature/query/functions.html	(revision 32993)
@@ -256,6 +256,17 @@
 	<p>
 	Return value: integer length of the list.
 
+	<h4 autotoc="yes"> isvoid(value) </h4>
+	<p>
+	Checks whether value is void (invalid).
+	<p>
+	Arguments:
+	<ul>
+		<li> value is any value, typically a function call
+	</ul>
+	<p>
+	Return value: 1 if value is void (invalid), 0 otherwise.
+
 	<h4 autotoc="yes"> getconf(path) </h4>
 	<p>
 	Fetch the value of a config node