diff --git a/src/modules/xmlops/doc/xmlops_admin.xml b/src/modules/xmlops/doc/xmlops_admin.xml
index 7082b03b1f1..d78247d3105 100644
--- a/src/modules/xmlops/doc/xmlops_admin.xml
+++ b/src/modules/xmlops/doc/xmlops_admin.xml
@@ -68,13 +68,30 @@ modparam("xmlops", "buf_size", 8192)
 		<title><varname>xml_ns</varname> (str)</title>
 		<para>
 		Register xml namespace prefix. Parameter value must have the format:
-		'prefix=uri'.</para>
+		'prefix=uri'.
+		</para>
+		<para>
+		This is useful when it is needed to access XML documents that specify
+		xmlns without prefix, which is not XML-standard compliant, but it
+		comes with SIP SIMPLE presence bodies.
+		</para>
 		<example>
 		<title>Set <varname>xml_ns</varname> parameter</title>
 		<programlisting format="linespecific">
+<![CDATA[
 ...
-modparam("xmlops", "xml_ns", "rpid=urn:ietf:params:xml:ns:pidf:rpid")
+modparam("xmlops", "xml_ns", "pidf=urn:ietf:params:xml:ns:pidf")
+...
+$xml(x=>doc) = '<?xml version="1.0" encoding="utf-8"?>
+    <presence xmlns="urn:ietf:params:xml:ns:pidf" entity="sip:test@mydomain.com">
+        <tuple id="86ae65b7-42de-4399-b635-295caad13aac">
+            <status><basic>none</basic></status>
+        </tuple>
+    </presence>';
+
+xinfo("status: $xml(x=>xpath:/pidf:presence/pidf:tuple/pidf:status/pidf:basic)\n");
 ...
+]]>
 </programlisting>
 		</example>
 	</section>