Bug 306576 Externalization/translation of strings in xmi files
Currently our e4xmi files have various hard-coded English strings that are presented to the user (in particular the "label" attributes). Is there some mechanism already defined for externalization/translation of NLS strings from these xmi files? If not, we need to define one. Creating a new xmi file from scratch for each language won't scale, and won't allow switching languages after the product is installed.
bundles/org.eclipse.e4.ui.workbench/src/org/eclipse/e4/ui/workbench/UIEvents.java
public static final String TOPIC = UITopicBase + "/application/ApplicationElement"; 
		public static final String ELEMENTID = "elementId"; 
		public static final String TAGS = "tags"; 
	}
	public static interface Contribution {
		public static final String TOPIC = UITopicBase + "/application/Contribution"; 
		public static final String CONTRIBUTIONURI = "contributionURI"; 
		public static final String OBJECT = "object"; 
		public static final String PERSISTEDSTATE = "persistedState"; 
	}
	public static interface StringToStringMap {
		public static final String TOPIC = UITopicBase + "/application/StringToStringMap"; 
		public static final String KEY = "key"; 
		public static final String VALUE = "value"; 
	}
	public static interface Perspective {
		public static final String TOPIC = UITopicBase + "/advanced/Perspective"; 
		public static final String WINDOWS = "windows"; 
	}
	public static interface Placeholder {
		public static final String TOPIC = UITopicBase + "/advanced/Placeholder"; 
		public static final String REF = "ref"; 
	}
	public static interface Part {
		public static final String TOPIC = UITopicBase + "/basic/Part"; 
		public static final String CLOSEABLE = "closeable"; 
		public static final String MENUS = "menus"; 
		public static final String TOOLBAR = "toolbar"; 
	}
	public static interface TrimmedWindow {