But before I do that, I thought I'd try to improve how we describe the structure of XML schemas in the present release, just a bit. I have tried a couple of things. First, I created an XML skeleton that shows which elements can occur inside which other elements:
You can see the full version in the Mondrian schema guide.
This approach shows where things are located, but it doesn't show how many of each element can belong to a particular parent element, or the order in which they are required. So, I wrote up a small BNF grammar and used Clapham to generate a railroad diagram. For comparison, the railroad diagram for the work-in-progress mondrian-4.0 schema is here.