plugins/org.eclipse.datatools.doc.isv/plugin.xml

<?xml version="1.0" encoding="UTF-8"?>
<?eclipse version="3.0"?>
<plugin>
   <extension
         point="org.eclipse.help.toc">
      <toc
            file="toc.xml"
            primary="true"/>
      <toc file="tocgettingstarted.xml"/>
      <toc file="tocreference.xml"/>
   </extension>

</plugin>