plugins/org.eclipse.emf.parsley.views/plugin.xml

<?xml version="1.0" encoding="UTF-8"?>
<?eclipse version="3.4"?>
<plugin>
   <extension
         point="org.eclipse.ui.views">
      <category
            id="org.eclipse.emf.parsley"
            name="EMF Parsley">
      </category>
   </extension>

</plugin>