diff --git a/dashboard/plugin.jelly b/dashboard/plugin.jelly
index 75c44c6d..eb8ecd6c 100644
--- a/dashboard/plugin.jelly
+++ b/dashboard/plugin.jelly
@@ -168,6 +168,12 @@
             <!-- Add aggregator content -->
             <j:set var="scriptProperty" 
                 value="maven.dashboard.aggregator.${aggregatorName}.script"/>
+            
+            <!-- Verify if the script exists... -->
+            <j:if test="${context.getVariable(scriptProperty) == null}">
+              <a:fail>Invalid aggregator name [${aggregatorName}]</a:fail>
+            </j:if>
+
             <j:import file="${context.getVariable(scriptProperty)}"
                 inherit="true"/>
 
diff --git a/dashboard/plugin.properties b/dashboard/plugin.properties
index 90c9fe67..b7ab248d 100644
--- a/dashboard/plugin.properties
+++ b/dashboard/plugin.properties
@@ -141,9 +141,16 @@ maven.dashboard.aggregator.juniterrors.label = JUnit Errors
 maven.dashboard.aggregator.juniterrors.goal = junit-report:report
 maven.dashboard.aggregator.juniterrors.description = Number of JUnit test errors
 
-# Properties for the JUnit Pass Rate  aggregator 
+# Properties for the JUnit Pass Rate aggregator 
 maven.dashboard.aggregator.junitpassrate.script = ${maven.dashboard.aggregators.dir}/junitpassrate.jelly
 maven.dashboard.aggregator.junitpassrate.artifact = ${maven.build.dir}/TESTS-TestSuites.xml
 maven.dashboard.aggregator.junitpassrate.label = JUnit Pass Rate
 maven.dashboard.aggregator.junitpassrate.goal = junit-report:report
 maven.dashboard.aggregator.junitpassrate.description = Percentage of JUnit tests that have passed vs tests in error or failed
+
+# Properties for the Simian duplicate lines aggregator 
+maven.dashboard.aggregator.simiantdl.script = ${maven.dashboard.aggregators.dir}/simiantdl.jelly
+maven.dashboard.aggregator.simiantdl.artifact = ${maven.build.dir}/generated-xdocs/simian-report.xml
+maven.dashboard.aggregator.simiantdl.label = Simian TDL
+maven.dashboard.aggregator.simiantdl.goal = maven-simian-plugin:report
+maven.dashboard.aggregator.simiantdl.description = Simian Total Duplicate Lines
diff --git a/dashboard/src/plugin-resources/aggregators/simiantdl.jelly b/dashboard/src/plugin-resources/aggregators/simiantdl.jelly
new file mode 100644
index 00000000..12eda87e
--- /dev/null
+++ b/dashboard/src/plugin-resources/aggregators/simiantdl.jelly
@@ -0,0 +1,40 @@
+<?xml version="1.0"?>
+
+<!-- 
+/*
+ * Copyright 2004 The Apache Software Foundation.
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+ -->
+
+<!--
+   ========================================================================
+     Total number of duplicate lines as found by Simian.
+   ========================================================================
+-->
+<j:jelly xmlns:j="jelly:core" xmlns:x="jelly:xml" xmlns:u="jelly:util">
+
+  <u:file var="artifactAsFile" 
+      name="${maven.dashboard.aggregator.simiantdl.artifact}"/>
+  <j:choose>
+    <j:when test="${artifactAsFile.exists()}">
+      <x:parse var="doc" xml="${artifactAsFile}"/>
+      <x:expr select="$doc//th[string() = 'Total number of duplicate lines']/following-sibling::*/text()"/>
+    </j:when>
+    <j:otherwise>
+      <j:expr value="-"/>
+    </j:otherwise>
+  </j:choose>
+
+</j:jelly>
\ No newline at end of file
diff --git a/dashboard/src/plugin-test/project.properties b/dashboard/src/plugin-test/project.properties
index cd67fe8d..e94d7bea 100644
--- a/dashboard/src/plugin-test/project.properties
+++ b/dashboard/src/plugin-test/project.properties
@@ -18,10 +18,11 @@
 # P R O J E C T  P R O P E R T I E S
 # -------------------------------------------------------------------
 maven.xdoc.date=left
-## maven.xdoc.version=${pom.currentVersion}
+maven.xdoc.version=${pom.currentVersion}
 maven.checkstyle.header.file = ${basedir}/LICENSE.txt
 
 offline=true
+maven.simian.linecount = 5
 
 # MUST specify these, even though they are the defaults, so we can run 
 # inside reactor where they were already set.
diff --git a/dashboard/src/plugin-test/subproject1/project.properties b/dashboard/src/plugin-test/subproject1/project.properties
index 3ea21cdb..df62491e 100644
--- a/dashboard/src/plugin-test/subproject1/project.properties
+++ b/dashboard/src/plugin-test/subproject1/project.properties
@@ -21,6 +21,6 @@ maven.xdoc.date=left
 ## maven.xdoc.version=${pom.currentVersion}
 maven.checkstyle.header.file = ${basedir}/../LICENSE.txt
 
-maven.dashboard.aggregators = csall,cserrors,cswarnings,clovertpc,cloverloc,cloverncloc,junittests,junitpassrate,junitfailures,juniterrors
+maven.dashboard.aggregators = csall,cserrors,cswarnings,clovertpc,cloverloc,cloverncloc,junittests,junitpassrate,junitfailures,juniterrors,simiantdl
 
 maven.clover.report.xml = true
diff --git a/dashboard/src/plugin-test/subproject1/project.xml b/dashboard/src/plugin-test/subproject1/project.xml
index 9905f365..ca22f33f 100644
--- a/dashboard/src/plugin-test/subproject1/project.xml
+++ b/dashboard/src/plugin-test/subproject1/project.xml
@@ -1,4 +1,5 @@
 <?xml version="1.0" encoding="ISO-8859-1"?>
+
 <!-- 
 /*
  * Copyright 2001-2004 The Apache Software Foundation.
@@ -37,5 +38,6 @@
     <report>maven-checkstyle-plugin</report>
     <report>maven-clover-plugin</report>
     <report>maven-junit-report-plugin</report>
+    <report>maven-simian-plugin</report>
   </reports>
 </project>
diff --git a/dashboard/src/plugin-test/subproject2/project.properties b/dashboard/src/plugin-test/subproject2/project.properties
index 8808cdd1..18c719bf 100644
--- a/dashboard/src/plugin-test/subproject2/project.properties
+++ b/dashboard/src/plugin-test/subproject2/project.properties
@@ -21,5 +21,5 @@ maven.xdoc.date=left
 ## maven.xdoc.version=${pom.currentVersion}
 maven.checkstyle.header.file = ${basedir}/../LICENSE.txt
 
-maven.dashboard.aggregators = csall,cserrors,cswarnings,clovertpc,cloverloc,cloverncloc,junittests,junitpassrate,junitfailures,juniterrors
+maven.dashboard.aggregators = csall,cserrors,cswarnings,clovertpc,cloverloc,cloverncloc,junittests,junitpassrate,junitfailures,juniterrors,simiantdl
 maven.dashboard.rungoals = true
diff --git a/dashboard/src/plugin-test/subproject3/project.properties b/dashboard/src/plugin-test/subproject3/project.properties
index b2c5c957..074bf74a 100644
--- a/dashboard/src/plugin-test/subproject3/project.properties
+++ b/dashboard/src/plugin-test/subproject3/project.properties
@@ -21,4 +21,4 @@ maven.xdoc.date=left
 ## maven.xdoc.version=${pom.currentVersion}
 maven.checkstyle.header.file = ${basedir}/../LICENSE.txt
 
-maven.dashboard.aggregators = csall,cserrors,cswarnings,clovertpc,cloverloc,cloverncloc,junittests,junitpassrate,junitfailures,juniterrors
+maven.dashboard.aggregators = csall,cserrors,cswarnings,clovertpc,cloverloc,cloverncloc,junittests,junitpassrate,junitfailures,juniterrors,simiantdl
diff --git a/dashboard/xdocs/aggregators.xml b/dashboard/xdocs/aggregators.xml
index c75fabee..74fa7ea4 100644
--- a/dashboard/xdocs/aggregators.xml
+++ b/dashboard/xdocs/aggregators.xml
@@ -109,6 +109,13 @@
             Percentage of JUnit tests that have passed.
           </td>
         </tr>
+        <tr>
+          <td>simiantdl</td>
+          <td>Simian</td>
+          <td>
+            Total number of duplicate lines found by Simian.
+          </td>
+        </tr>
       </table>
     </section>
  </body>
diff --git a/dashboard/xdocs/changes.xml b/dashboard/xdocs/changes.xml
index e90d60a9..87c862bc 100644
--- a/dashboard/xdocs/changes.xml
+++ b/dashboard/xdocs/changes.xml
@@ -27,6 +27,12 @@
   <body>
 
     <release version="1.3" date="in CVS">
+      <action dev="vmassol" type="update">
+        Better error reporting when a wrong aggregator name is used.
+      </action>
+      <action dev="vmassol" type="add">
+        Added Simian Total Duplicate Lines aggregator.
+      </action>
       <action dev="vmassol" type="update">
         Updated plugin tests to verify we can generate the dashboard
         report by using the multiproject:site goal. Also updated documentation
diff --git a/dashboard/xdocs/properties.xml b/dashboard/xdocs/properties.xml
index 5d766900..344ee381 100644
--- a/dashboard/xdocs/properties.xml
+++ b/dashboard/xdocs/properties.xml
@@ -37,14 +37,22 @@ maven.dashboard.ignoreFailures=false
 # Generated dashboard xml data file
 maven.dashboard.report.xml = ${maven.build.dir}/dashboard-data.xml
 
-# Generated dashboard xdoc file name (without the extension). 
+# Generated dashboard main report xdoc file name (without the extension). 
 # Note: The value must not include any path as the xdoc will be 
 # generated in ${maven.gen.docs}.
 maven.dashboard.report.xdoc = dashboard-report
 
-# Location of JSL template to generate the xdoc file
+# Generated dashboard legend xdoc file name (without the extension). 
+# Note: The value must not include any path as the xdoc will be 
+# generated in ${maven.gen.docs}.
+maven.dashboard.report.legend.xdoc = dashboard-report-legend
+
+# Location of JSL template to generate the main report xdoc file
 maven.dashboard.template = ${plugin.resources}/templates/dashboard.jsl
 
+# Location of JSL template to generate the legend report xdoc file
+maven.dashboard.template.legend = ${plugin.resources}/templates/legend.jsl
+
 # Decide whether a call to dashboard:report will call the reactor
 # on the child projects to generate individual dashboard data. If you
 # already using the multiproject project or the reactor, a better option
@@ -61,52 +69,96 @@ maven.dashboard.report.showempty = true
 # ------------------------------------------------------------
 
 # Location of default dashboard aggregators
-maven.dashboard.aggregators.dir = ${plugin.resources}/reports
+maven.dashboard.aggregators.dir = ${plugin.resources}/aggregators
 
 # Comma-separated list of aggregators to use
 maven.dashboard.aggregators = cserrors,cswarnings,clovertpc,cloverloc,cloverncloc
 
-# Properties for the Checkstyle error/warning aggregator (all errors/warnings)
-maven.dashboard.aggregator.csall.script = ${maven.dashboard.aggregators.dir}/csall.jelly
-maven.dashboard.aggregator.csall.artifact = ${maven.build.dir}/checkstyle-raw-report.xml
-maven.dashboard.aggregator.csall.label = CS err/warn
-maven.dashboard.aggregator.csall.goal = checkstyle
-
-# Properties for the Checkstyle error aggregator (only errors)
-maven.dashboard.aggregator.cserrors.script = ${maven.dashboard.aggregators.dir}/cserrors.jelly
-maven.dashboard.aggregator.cserrors.artifact = ${maven.build.dir}/checkstyle-raw-report.xml
-maven.dashboard.aggregator.cserrors.label = CS errors
-maven.dashboard.aggregator.cserrors.goal = checkstyle
-
-# Properties for the Checkstyle warning aggregator (only warnings)
-maven.dashboard.aggregator.cswarnings.script = ${maven.dashboard.aggregators.dir}/cswarnings.jelly
-maven.dashboard.aggregator.cswarnings.artifact = ${maven.build.dir}/checkstyle-raw-report.xml
-maven.dashboard.aggregator.cswarnings.label = CS warnings
-maven.dashboard.aggregator.cswarnings.goal = checkstyle
-
-# Properties for the Clover TPC aggregator (TPC = Total Percent Coverage)
-maven.dashboard.aggregator.clovertpc.script = ${maven.dashboard.aggregators.dir}/clovertpc.jelly
-maven.dashboard.aggregator.clovertpc.artifact = ${maven.build.dir}/clover.xml
-maven.dashboard.aggregator.clovertpc.label = Clover TPC
-maven.dashboard.aggregator.clovertpc.goal = clover
-
-# Properties for the Clover LOC aggregator (LOC = Line Of Code)
-maven.dashboard.aggregator.cloverloc.script = ${maven.dashboard.aggregators.dir}/cloverloc.jelly
-maven.dashboard.aggregator.cloverloc.artifact = ${maven.build.dir}/clover.xml
-maven.dashboard.aggregator.cloverloc.label = Clover LOC
-maven.dashboard.aggregator.cloverloc.goal = clover
-
-# Properties for the Clover NCLOC aggregator (NCLOC = Non Comment Line Of Code)
-maven.dashboard.aggregator.cloverncloc.script = ${maven.dashboard.aggregators.dir}/cloverncloc.jelly
-maven.dashboard.aggregator.cloverncloc.artifact = ${maven.build.dir}/clover.xml
-maven.dashboard.aggregator.cloverncloc.label = Clover NCLOC
-maven.dashboard.aggregator.cloverncloc.goal = clover
-
 # Generated dashboard data for a single project
 maven.dashboard.report.single = ${maven.build.dir}/dashboard-single.xml
 
 # Decide whether to call goals associated with report types or not
 maven.dashboard.rungoals = true
+
+# Default aggregators
+# -------------------
+
+# Properties for the Checkstyle error/warning aggregator (all errors/warnings)
+maven.dashboard.aggregator.csall.script = ${maven.dashboard.aggregators.dir}/csall.jelly
+maven.dashboard.aggregator.csall.artifact = ${maven.build.dir}/checkstyle-raw-report.xml
+maven.dashboard.aggregator.csall.label = CS err/warn
+maven.dashboard.aggregator.csall.goal = checkstyle
+maven.dashboard.aggregator.csall.description = Number of Checkstyle errors and warnings
+
+# Properties for the Checkstyle error aggregator (only errors)
+maven.dashboard.aggregator.cserrors.script = ${maven.dashboard.aggregators.dir}/cserrors.jelly
+maven.dashboard.aggregator.cserrors.artifact = ${maven.build.dir}/checkstyle-raw-report.xml
+maven.dashboard.aggregator.cserrors.label = CS errors
+maven.dashboard.aggregator.cserrors.goal = checkstyle
+maven.dashboard.aggregator.cserrors.description = Number of Checkstyle errors
+
+# Properties for the Checkstyle warning aggregator (only warnings)
+maven.dashboard.aggregator.cswarnings.script = ${maven.dashboard.aggregators.dir}/cswarnings.jelly
+maven.dashboard.aggregator.cswarnings.artifact = ${maven.build.dir}/checkstyle-raw-report.xml
+maven.dashboard.aggregator.cswarnings.label = CS warnings
+maven.dashboard.aggregator.cswarnings.goal = checkstyle
+maven.dashboard.aggregator.cswarnings.description = Number of Checkstyle warnings
+
+# Properties for the Clover TPC aggregator (TPC = Total Percent Coverage)
+maven.dashboard.aggregator.clovertpc.script = ${maven.dashboard.aggregators.dir}/clovertpc.jelly
+maven.dashboard.aggregator.clovertpc.artifact = ${maven.build.dir}/clover.xml
+maven.dashboard.aggregator.clovertpc.label = Clover TPC
+maven.dashboard.aggregator.clovertpc.goal = clover
+maven.dashboard.aggregator.clovertpc.description = Number of test coverage percentage
+
+# Properties for the Clover LOC aggregator (LOC = Line Of Code)
+maven.dashboard.aggregator.cloverloc.script = ${maven.dashboard.aggregators.dir}/cloverloc.jelly
+maven.dashboard.aggregator.cloverloc.artifact = ${maven.build.dir}/clover.xml
+maven.dashboard.aggregator.cloverloc.label = Clover LOC
+maven.dashboard.aggregator.cloverloc.goal = clover
+maven.dashboard.aggregator.cloverloc.description = Number of line of code (including comments)
+
+# Properties for the Clover NCLOC aggregator (NCLOC = Non Comment Line Of Code)
+maven.dashboard.aggregator.cloverncloc.script = ${maven.dashboard.aggregators.dir}/cloverncloc.jelly
+maven.dashboard.aggregator.cloverncloc.artifact = ${maven.build.dir}/clover.xml
+maven.dashboard.aggregator.cloverncloc.label = Clover NCLOC
+maven.dashboard.aggregator.cloverncloc.goal = clover
+maven.dashboard.aggregator.cloverncloc.description = Number of non-commented lines of code
+
+# Properties for the JUnit Test aggregator 
+maven.dashboard.aggregator.junittests.script = ${maven.dashboard.aggregators.dir}/junittests.jelly
+maven.dashboard.aggregator.junittests.artifact = ${maven.build.dir}/TESTS-TestSuites.xml
+maven.dashboard.aggregator.junittests.label = JUnit Tests
+maven.dashboard.aggregator.junittests.goal = junit-report:report
+maven.dashboard.aggregator.junittests.description = Number of JUnit tests
+
+# Properties for the JUnit Failures aggregator 
+maven.dashboard.aggregator.junitfailures.script = ${maven.dashboard.aggregators.dir}/junitfailures.jelly
+maven.dashboard.aggregator.junitfailures.artifact = ${maven.build.dir}/TESTS-TestSuites.xml
+maven.dashboard.aggregator.junitfailures.label = JUnit Failures
+maven.dashboard.aggregator.junitfailures.goal = junit-report:report
+maven.dashboard.aggregator.junitfailures.description = Number of JUnit test failures
+
+# Properties for the JUnit Errors aggregator 
+maven.dashboard.aggregator.juniterrors.script = ${maven.dashboard.aggregators.dir}/juniterrors.jelly
+maven.dashboard.aggregator.juniterrors.artifact = ${maven.build.dir}/TESTS-TestSuites.xml
+maven.dashboard.aggregator.juniterrors.label = JUnit Errors
+maven.dashboard.aggregator.juniterrors.goal = junit-report:report
+maven.dashboard.aggregator.juniterrors.description = Number of JUnit test errors
+
+# Properties for the JUnit Pass Rate aggregator 
+maven.dashboard.aggregator.junitpassrate.script = ${maven.dashboard.aggregators.dir}/junitpassrate.jelly
+maven.dashboard.aggregator.junitpassrate.artifact = ${maven.build.dir}/TESTS-TestSuites.xml
+maven.dashboard.aggregator.junitpassrate.label = JUnit Pass Rate
+maven.dashboard.aggregator.junitpassrate.goal = junit-report:report
+maven.dashboard.aggregator.junitpassrate.description = Percentage of JUnit tests that have passed vs tests in error or failed
+
+# Properties for the Simian duplicate lines aggregator 
+maven.dashboard.aggregator.simiantdl.script = ${maven.dashboard.aggregators.dir}/simiantdl.jelly
+maven.dashboard.aggregator.simiantdl.artifact = ${maven.build.dir}/generated-xdocs/simian-report.xml
+maven.dashboard.aggregator.simiantdl.label = Simian TDL
+maven.dashboard.aggregator.simiantdl.goal = maven-simian-plugin:report
+maven.dashboard.aggregator.simiantdl.description = Simian Total Duplicate Lines
 ]]></source>
     </section>
   </body>