doc:  document "IS NOT DOCUMENT"
Reported-by:
Discussion:
Author: Euler Taveira
Backpatch-through: 9.3
@@ -9712,6 +9712,24 @@ SELECT xmlagg(x) FROM (SELECT * FROM test ORDER BY y DESC) AS tab;
</para>
</sect3>
+ <sect3>
+ <title><literal>IS NOT DOCUMENT</literal></title>
+
+ <indexterm>
+ <primary>IS NOT DOCUMENT</primary>
+ </indexterm>
+
+<synopsis>
+<replaceable>xml</replaceable> IS NOT DOCUMENT
+</synopsis>
+
+ <para>
+ The expression <literal>IS NOT DOCUMENT</literal> returns false if the
+ argument XML value is a proper XML document, true if it is not (that is,
+ it is a content fragment), or null if the argument is null.
+ </para>
+ </sect3>
+
<sect3 id="xml-exists">
<title><literal>XMLEXISTS</literal></title>
