plugins/org.eclipse.app4mc.visualization.help/plugin.xml

<?xml version="1.0" encoding="UTF-8"?>
<?eclipse version="3.4"?>
<plugin>
   <extension
         point="org.eclipse.help.toc">

      <toc
            file="root-dev_visualization-toc.xml"
            primary="false">
      </toc>
      <toc
            file="toc/dev_visualization-toc.xml"
            primary="false">
      </toc>

      <toc
            file="root-user_visualization-toc.xml"
            primary="false">
      </toc>
      <toc
            file="toc/user_visualization-toc.xml"
            primary="false">
      </toc>
   </extension>

</plugin>