Yes, it's possible to parse XML files using java. You must read the document to parse and substitute the XML tags for a valid html ones. That implementation depends on your needings, and the kind of document you made.

XML is not a standard way of definition; this is the power of XML, you can do what you need, and as you need. And flash isn't a xml document... it's just a vectorial graphic document.

Hope it'll help you.

Sergi