examples/org.eclipse.ocl.examples.common/plugin.xml

<?xml version="1.0" encoding="UTF-8"?>
<?eclipse version="3.4"?>
<plugin>
   <extension-point id="label_generator" name="%_UI_LabelGenerator_extensionpoint" schema="schema/label_generator.exsd"/>

   <extension point="org.eclipse.ocl.examples.common.label_generator">
      <generator for="org.eclipse.emf.ecore.ENamedElement"
      	class="org.eclipse.ocl.examples.common.label.generators.ENamedElementLabelGenerator"/>
      <generator for="org.eclipse.emf.ecore.EObject"
      	class="org.eclipse.ocl.examples.common.label.generators.EObjectLabelGenerator"/>
      <generator for="org.eclipse.emf.common.util.URI"
      	class="org.eclipse.ocl.examples.common.label.generators.EcoreURILabelGenerator"/>
      <generator for="java.lang.String"
      	class="org.eclipse.ocl.examples.common.label.generators.StringLabelGenerator"/>
   </extension>

</plugin>