> Markup language defines DOM structure (tree of UI objects). And you must have DOM in your application, either as tree of DOM nodes or tree of window nodes. Y

> Markup language defines DOM structure (tree of UI objects). And you must have DOM in your application, either as tree of DOM nodes or tree of window nodes. You've argued that UIs require a DOM. Ok, so UIs require a DOM. That still fails to make a case for needing a separate proprietary markup language to define a DOM, let alone a XML-based one. Even the Qt folks learned that lesson nearly a decade ago with the introduction of QML. https://en.wikipedia.org/wiki/QML https://en.wikipedia.org/wiki/QML