plugins/org.eclipse.xsd.edit/plugin.xml

<?xml version="1.0" encoding="UTF-8"?>
<?eclipse version="3.0"?>
<plugin>
   <extension point="org.eclipse.emf.edit.itemProviderAdapterFactories">
      <factory
            uri="http://www.eclipse.org/xsd/2002/XSD"
            class="org.eclipse.xsd.provider.XSDItemProviderAdapterFactory"
            supportedTypes=
                 "org.eclipse.emf.edit.provider.IEditingDomainItemProvider
                  org.eclipse.emf.edit.provider.IStructuredItemContentProvider
                  org.eclipse.emf.edit.provider.ITreeItemContentProvider
                  org.eclipse.emf.edit.provider.IItemLabelProvider
                  org.eclipse.emf.edit.provider.IItemPropertySource"/>
   </extension>
</plugin>