doc/org.eclipse.xsd.doc/plugin.xml

<?xml version="1.0" encoding="UTF-8"?>
<?eclipse version="3.0"?>
<plugin>
  <!-- ====================================================================== -->
  <!-- Define primary TOC                                                     -->
  <!-- ====================================================================== -->
  <extension point="org.eclipse.help.toc">
    <toc file="toc.xml" primary="true"/>
	<index path="index"/>
  </extension>

  <!-- ====================================================================== -->
  <!-- Define TOCs                                                            -->
  <!-- ====================================================================== -->

   <extension point="org.eclipse.help.toc">
       <toc file="topics_Reference.xml" />
   </extension>

<!-- ============================================================================= -->
<!-- Define Javadoc locations                                                      -->
<!-- ============================================================================= -->
   <extension point="org.eclipse.pde.core.javadoc">
      <javadoc path="references/javadoc"> <!-- defaults to reference/api -->
          <!-- @pluginIDs@ --><plugin id="org.eclipse.xsd"/>
       </javadoc>
   </extension>

</plugin>