XML, DTD: how to make the order not important

Question

I started off using an XML file and a parser as a convenient way to store my data

I want to use DTD to check the structure of the xml files when they arrive.

Answer 1

You can use ANY keyword if you don't bother too much about validity:

I have faced a similar problem here, this two cases may appear:

The only solution I found was this:

Maybe there are a better solution, but it works fine for my particular problem.