It's designed to allow anyone to manage complex data without SQL , in fact the .xml itself is a database.
The basic idea is to combine an xml parser and a cms, so you can manage a simple xml node content as if it were a wysiwyg editor, a file uploader, a select dropdown, a color picker, an iphone styled switch, even a content separator!
What you get is an xml fueled interface that allows to manage rich data without any need for sql.
In addition the system uses a classical xml viewer approach, with tabs representing the parent nodes so we can handle very complex nested data.
So take a look and invest 5 minutes to read the documentation, because this is a system that could really change the way you work.
Think of the possibilities: an online xml editor that works out of the box, ready in 2 minutes and is compatible with any standard xml file.