Google for: xml schema parameterized and the first hit should be for a patent application submitted 9/11/2008 by Steven Patterson Burns of Microsoft. How do I know this? I did it to check to see if anyone else had examples of a particular XSLT transformation on schemas, since I was about to attempt to write one. I'm an XSLT newbie, but here's a patent for basically a subset of what XSLT does (not clear if the author knows about XSLT, though). Its ridiculous -- do some particular set of obvious transformations (in this case, annotating a type or element to produce variants), and apply for a patent. This one seems particularly heinous, since XSLT has been around for years, and the general concept is just another of the infinitude of pedestrian code-generation techniques that have been around for decades, and which everyone knows about and does.