Use JavaDoc ant-Tags as in Ant itself.
diff --git a/build.xml b/build.xml
index 0e0ce60..d4cebdb 100644
--- a/build.xml
+++ b/build.xml
@@ -242,6 +242,12 @@
         <path refid="classpath.compile"/>
         <fileset dir="${ant.home}/lib" includes="*.jar"/>
       </classpath>
+      <tag name="todo" description="To do:" scope="all"/>
+      <tag name="ant.task" enabled="false" description="Task:" scope="types"/>
+      <tag name="ant.datatype" enabled="false" description="Data type:" scope="types"/>
+      <tag name="ant.attribute" enabled="false" description="Attribute:" scope="types"/>
+      <tag name="ant.attribute.group" enabled="false" description="Attribute group:" scope="types"/>
+      <tag name="ant.element" enabled="false" description="Nested element:" scope="types"/>
     </javadoc>
   </target>