Anyway, that's not really the point I was making. Native UI can be thought of and used as a DOM model, but that's not inherent to the process unless you're literally writing traditional database+presentation+edit applications.
I was more poking light-hearted fun at the explosion in terminology and concepts exposed to someone doing web-based "frontend" development, and how little most of this has to do with HTML, CSS and the general classical model of "a browser".
You probably haven't done any native UI as native UI uses exactly the same idiom.
native UI also uses DOM concept, it is just that instead of child elements it uses term child windows or [Gtk]widgets or [ns]View s.