systemtap/org.eclipse.linuxtools.callgraph.docs/plugin.xml

<?xml version="1.0" encoding="UTF-8"?>
<?eclipse version="3.4"?>
<plugin>
   <extension
         point="org.eclipse.help.toc">
      <toc file="toc-doc.xml" primary="true" />
      <toc file="toc.xml"  primary="false" />
   </extension>
</plugin>