<extension point="org.eclipse.ui.decorators"> <decorator icon="icons/myDecoration.png" id="myDecorator" label="My Decoration" lightweight="true" location="REPLACE" state="true"> <enablement> <and> <objectClass name="org.eclipse.core.resources.IResource"> </objectClass> <objectState name="extension" value="myFileExtension"> </objectState> </and> </enablement> <description> Decorator for my files. </description> </decorator> </extension>