diff --git a/javadoc/plugin.jelly b/javadoc/plugin.jelly
index 38caf52b..b9835b6b 100644
--- a/javadoc/plugin.jelly
+++ b/javadoc/plugin.jelly
@@ -398,10 +398,54 @@ internal_javadoc_src_tmp          = [${internal_javadoc_src_tmp}]
         <!-- allow custom doclets       -->
         <!-- ========================== -->
         <j:if test="${context.getVariable('maven.javadoc.doclet') != null}">
-          <ant:setProperty name="doclet" value="${maven.javadoc.doclet}" />
-        </j:if>
-        <j:if test="${context.getVariable('maven.javadoc.docletpath') != null}">
-          <ant:setProperty name="docletpath" value="${maven.javadoc.docletpath}" />
+          <j:if test="${maven.javadoc.debug}">
+            <ant:echo>
+===============================================================================
+Processing custom doclet settings - BEGIN
+-------------------------------------------------------------------------------
+            </ant:echo>
+          </j:if>
+
+          <doclet name="${maven.javadoc.doclet}" path="${maven.javadoc.docletpath}">
+            <j:if test="${!empty(maven.javadoc.doclet.param.list)}">
+              <j:if test="${maven.javadoc.debug}">
+                <ant:echo>Using doclet param list=${maven.javadoc.doclet.param.list}</ant:echo>
+              </j:if>
+
+              <u:tokenize var="items" delim="${maven.javadoc.doclet.param.list.delim}">
+                ${maven.javadoc.doclet.param.list}
+              </u:tokenize>
+
+              <j:forEach var="item" items="${items}">
+                <j:set var="param.prop.name" value="${item}.name"/>
+                <j:set var="param.prop.value" value="${item}.value"/>
+
+                <!-- get value of variable held in the 'prop' variable -->
+                <j:set var="param.name" value="${context.getVariable(param.prop.name)}"/>
+                <j:set var="param.value" value="${context.getVariable(param.prop.value)}"/>
+
+                <j:if test="${maven.javadoc.debug}">
+                  <ant:echo>For '${item}', adding param name='${param.name}' value='${param.value}'</ant:echo>
+                </j:if>
+                <j:if test="${empty(param.name)}">
+                  <ant:echo>ERROR: Did not find '${param.prop.name}' in properties!</ant:echo>
+                </j:if>
+                <j:if test="${empty(param.value)}">
+                    <ant:echo>WARNING: Did not find '${param.prop.value}' in properties! (this may be intended if the param does not have a value)</ant:echo>
+                </j:if>
+                <param name="${param.name}" value="${param.value}"/>
+              </j:forEach>
+
+            </j:if>
+          </doclet>
+
+          <j:if test="${maven.javadoc.debug}">
+            <ant:echo>
+-------------------------------------------------------------------------------
+Processing custom doclet settings - END
+===============================================================================
+            </ant:echo>
+          </j:if>
         </j:if>
     
         <!-- ========================== -->
diff --git a/javadoc/xdocs/changes.xml b/javadoc/xdocs/changes.xml
index 0681c897..d274975d 100644
--- a/javadoc/xdocs/changes.xml
+++ b/javadoc/xdocs/changes.xml
@@ -27,6 +27,7 @@
   <body>
     <release version="1.8.1-SNAPSHOT" date="In SVN">
       <action dev="aheritier" type="fix">Do not add a directory of sources which doesn't exist.</action>
+      <action dev="jjensen" type="add" issue="MPJAVADOC-80">Add specifying params with alternate doclets.</action>
     </release>
     <release version="1.8" date="2006-01-15">
       <action dev="ltheussl" type="fix" issue="MPJAVADOC-52">Cannot set -sourcepath to add paths for inherited javadocs.</action>
diff --git a/javadoc/xdocs/faq.fml b/javadoc/xdocs/faq.fml
index db20722b..84cb4dd2 100644
--- a/javadoc/xdocs/faq.fml
+++ b/javadoc/xdocs/faq.fml
@@ -79,7 +79,17 @@ maven.javadoc.doclet=gr.spinellis.umlgraph.doclet.UmlGraphDoc
 maven.javadoc.docletpath=${maven.repo.local}/gr.spinellis/jars/UmlGraph-4.6.jar
 maven.javadoc.usestandardparameters=true
 </source>
-            
+            <p>
+              Maven Javadoc plugin version 1.9 and newer
+              enables specifying custom doclet parameters.
+              This makes configuring UMLGraph's doclet possible,
+              for example, turning on extra class diagram adornments.
+              Adjust these as desired, referring to the UMLGraph documentation.
+            </p>
+<source>
+maven.javadoc.doclet.param.list=umlgraph.all
+umlgraph.all.name=-all
+</source>
             <li>
               Install dot (in <a href="http://www.graphviz.org">Graphviz</a>)
               and put on PATH (so UmlGraphDoc can run it); e.g. for Windows:
@@ -88,6 +98,10 @@ maven.javadoc.usestandardparameters=true
 GRAPHVIZ_HOME=(the path)
 PATH=%PATH%;%GRAPHVIZ_HOME%\bin
 </source>
+            <p>
+              Note that UmgGraphDoc outputs an error message
+              if it could not run dot.
+            </p>
           </ol>
         </p>
         <p>
diff --git a/javadoc/xdocs/properties.xml b/javadoc/xdocs/properties.xml
index ee90217c..38079d72 100644
--- a/javadoc/xdocs/properties.xml
+++ b/javadoc/xdocs/properties.xml
@@ -340,10 +340,10 @@ tag2.scope=all]]></source>
     <section name="Alternate Doclet Settings">
       <table>
         <tr>
-          <th>Type</th>
           <th>Name</th>
           <th>Optional?</th>
           <th>Description</th>
+          <th>Default</th>
         </tr>
         <tr>
           <td>maven.javadoc.doclet</td>
@@ -355,6 +355,7 @@ tag2.scope=all]]></source>
             See <a href="faq.html#classdiagrams">Class Diagrams FAQ</a>
             as an example.
           </td>
+          <td>(none - calls the JavaDoc standard doclet)</td>
         </tr>
         <tr>
           <td>maven.javadoc.docletpath</td>
@@ -365,6 +366,7 @@ tag2.scope=all]]></source>
             <a href="http://ant.apache.org/manual/CoreTasks/javadoc.html">the 
             ant javadoc task</a> documentation for more detail.
           </td>
+          <td>(none)</td>
         </tr>
         <tr>
           <td>maven.javadoc.usestandardparameters</td>
@@ -378,6 +380,53 @@ tag2.scope=all]]></source>
             the plugin does not use the standard doclet parameters
             unless this property is set.
           </td>
+          <td>(none)</td>
+        </tr>
+        <tr>
+          <td>maven.javadoc.doclet.param.list</td>
+          <td>Yes</td>
+          <td>
+            <p>
+              Delimeter separated list of property names
+              (see maven.javadoc.doclet.param.list.delim),
+              with each property defining a parameter name and value,
+              to pass to the doclet.
+              For example: <code>umlgraph.all,property2.abc,property3.def</code>
+            </p>
+            <p>
+              For every property listed, it expects 2 additional properties:
+              <dl>
+                <dt>(propertyname).name</dt>
+                <dd>The name of the parameter to pass to the doclet.</dd>
+                <dt>(propertyname).value</dt>
+                <dd>
+                  The value of the parameter to pass to the doclet.
+                  Note that this can be not specified,
+                  if the parameter name is all that is needed.
+                </dd>
+              </dl>
+            </p>
+            <p>
+              For example, to specify the "-all" parameter to the doclet
+              and "-all" does not have a parameter value:
+<source>
+maven.javadoc.doclet.param.list=umlgraph.all
+umlgraph.all.name=-all
+</source>
+            </p>
+          </td>
+          <td>(none)</td>
+        </tr>
+        <tr>
+          <td>maven.javadoc.doclet.param.list.delim</td>
+          <td>Yes</td>
+          <td>
+            <p>
+              Property name delimeter for list of parameters specified in
+              maven.javadoc.doclet.param.list.
+            </p>
+          </td>
+          <td>, (comma)</td>
         </tr>
       </table>
     </section>

Type	Name	Optional?	Description
maven.javadoc.doclet	(none - calls the JavaDoc standard doclet)
maven.javadoc.docletpath	(none)
maven.javadoc.usestandardparameters	(none)
maven.javadoc.doclet.param.list	Yes	+ + Delimeter separated list of property names + (see maven.javadoc.doclet.param.list.delim), + with each property defining a parameter name and value, + to pass to the doclet. + For example: `umlgraph.all,property2.abc,property3.def` + + + For every property listed, it expects 2 additional properties: + + (propertyname).name + The name of the parameter to pass to the doclet. + (propertyname).value + + The value of the parameter to pass to the doclet. + Note that this can be not specified, + if the parameter name is all that is needed. + + + + + For example, to specify the "-all" parameter to the doclet + and "-all" does not have a parameter value: + +maven.javadoc.doclet.param.list=umlgraph.all +umlgraph.all.name=-all + + +	(none)
maven.javadoc.doclet.param.list.delim	Yes	+ + Property name delimeter for list of parameters specified in + maven.javadoc.doclet.param.list. + +	, (comma)