DITA provides a wintitle element for marking up the titles of windows, dialogs, wizards, etc. The current doc set uses it only once. In all other cases, window titles are marked up using uicontrol.

Was there a decision made not to use wintitle or is this simply a case of authors not making the distinction.

I can see some potential uses down the line for having window titles markup us differently from other ui elements. Windows are elements that might have topics about them, so there is the potential to use such markup for validation or linking.

It may not be worth going back and fixing all cases, but maybe it is worthwhile to start using wintitle going forward?