Bug 46393 [RCP] Lost nature icon on project
N20031111 start fresh workspace, create a Java project ==> missing nature icon "J"
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/registry/CapabilityRegistryReader.java
private static final String TAG_CAPABILITY = "capability"; 
	private static final String TAG_CATEGORY = "category"; 
	private static final String TAG_HANDLE_UI = "handleUI"; 
	private static final String TAG_PERSPECTIVE_CHOICE = "perspectiveChoice"; 
	
	private static final String ATT_ID = "id"; 
	
	private CapabilityRegistry capabilityRegistry;
	private Capability currentCapability;
	
	/**
	 * Reads an element of the plugin registry and adds it to the capability
	 * registry if it is a capability or category (or a handleUI element, a
	 * child of a capability. A handleUI element represents another capability
	 * for which this capability controls the user interface).