examples/workspace/org.eclipse.egf.example.fcs/plugin.xml

<?xml version="1.0" encoding="UTF-8"?>
<?eclipse version="3.0"?>
<plugin
>
   <extension
         point="org.eclipse.egf.core.fcore">
      <fcore 
            id="egf/fc1.fcore">
      </fcore>
      <fcore
            id="egf/fc2.fcore">
      </fcore>
   </extension>  
      
</plugin>