Bug 126658 [CommonNavigator] [DND] Complete definition of DND API
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/navigator/INavigatorContentDescriptor.java
/**
	 * Returns the navgiator content extension id
	 * 
	 * @return the navgiator content extension id
	 */
	String getId();
	/**
	 * Returns the name of this navigator extension
	 * 
	 * @return the name of this navigator extension
	 */
	String getName();
	/**
	 * Returns the priority of the navigator content extension.
	 * 
	 * @return the priority of the navigator content extension. Returns 0 (zero)
	 *         if no priority was specified.
	 */
	int getPriority();
 
	/**
	 * The enabledByDefault attribute specifies whether an extension should be
	 * activated in the context of a viewer automatically. Users may override
	 * this setting through the "Types of Content" dialog.