Who Owns XML?: "Developed by the World Wide Web Consortium (W3C) between 1996 and 1998, XML has become the dominant way of describing and structuring data so that it can be shared across the Internet and displayed in any browser.
But now executives at Scientigo, a small software maker based in Charlotte, NC, say the company owns two U.S. patents (No. 5,842,213 and No. 6,393,426), that cover one of the fundamental concepts behind XML: the idea of packaging data in a self-defining format that allows it to be correctly displayed wherever it travels. "