When opening a Dozer-mapping-file the Dozer-editor appears. If you want to edit the
raw XML you can switch to the "source" view.
All the class-a/class-b, field, get-method, set-method, etc -nodes or -attributes automaticly
show content-assist popups when pressing ctrl+space or the configured WTP-XML content assist
characters. These can be changed in the preferences.