doc/org.eclipse.gmf.doc/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="toc-runtime.xml"/>
      <toc file="toc-tooling.xml"/>
      <toc file="toc-runtime-ext-pt.xml"/>
   </extension>
   <extension
         point="org.eclipse.help.contentProducer">
      <binding
            producerId="org.eclipse.help.dynamic">
      </binding>
   </extension>
   <extension
         point="org.eclipse.help.base.luceneSearchParticipants">
      <binding
            participantId="org.eclipse.help.base.xhtml">
      </binding>
   </extension>

</plugin>