Generating documentation

Hi all. 

I have an XML Schema that I want to use to generate documentation from. I've downloaded the XS3P from Project TITANIUM and I'll use it as the starting point for my own transform. 

What I'm hoping is that someone has a piece of open source software that will let me create images of the various pieces. I've used Stylus Studio and it does a good job but I don't want to buy the latest version. And if I could customize the image, that would be very nice. 

Does anyone know of anything perhaps that will generate SVG from an XSD? Then its easy to run it through batik. 

Also, if anyone has other examples of transforms for generating documentation (HTML/PDF/DocBook/what ever) I'd love having more to look at. 

Thanks

Adam