diff --git a/xdocs/external.xml b/xdocs/external.xml
index f0ca305cf..d7c18656a 100644
--- a/xdocs/external.xml
+++ b/xdocs/external.xml
@@ -1483,6 +1483,39 @@
         </table>
       </subsection>
 
+      <subsection name="Jdiff">
+
+        <p>A task that generates an HTML report of all the packages, classes,
+        constructors, methods, and fields which have been removed, added or
+        changed in any way, including their documentation, when two APIs are
+        compared. </p>
+
+        <table class="externals">
+          <tr>
+            <th>Compatibility:</th>
+            <td>Ant 1.6</td>
+          </tr>
+          <tr>
+            <th>URL:</th>
+            <td>
+            <a href="http://javadiff.sourceforge.net/" >
+            http://javadiff.sourceforge.net/</a></td>
+          </tr>
+          <tr>
+            <th>Task Documentation:</th>
+            <td>
+            <a 
+            href="http://cvs.sourceforge.net/viewcvs.py/*checkout*/javadiff/jdiff/jdiff.html?rev=HEAD&amp;content-type=text/html#JDiffAntTask"
+            >
+            (in CVS)</a></td>
+          </tr>
+          <tr>
+            <th>License:</th>
+            <td>LGPL</td>
+          </tr>
+        </table>
+      </subsection>
+        
       <subsection name="JFlex">
 
         <p>JFlex is a lexical analyzer generator (also known as