While HTML5, finally standardized, is taking its place in the Web development hierarchy, developers are already looking ahead to HTML6. This is what we might call the radical idea stage.
Still largely in its conceptual and debate phase, HTML6 is foundationally similar to HTML, but with XML-like namespaces. Among the many features and experimental functionality proposed for inclusion in HTML6 is optimization for the growing number of single-page applications on the Web, designed with content loaded dynamically via JSON APIs.
Mozumder’s informal explanation detailed a new JSON/XML internal data structure separate from the DOM, defined and tagged with a new MODEL attribute that declaratively defines the content in it based on the loaded data. The concept purports that anything in the DOM should be replaceable, including the URL bar and style sheets. Asking for input from the WHATWG community, Mozumder explained his logic.