Thanks for your reply. I'm planning to drop the last sentence of the paragraph I sent to you anyway. We know for sure that Guha created the Meta Content Framework, which was announced by 1997, but exactly who did what after that can't be determined from our current references. The Netscape press release of March 1999 doesn't mention Guha's name, so we can't even declare him as the author of that implementation. The editors who created History of web syndication technology may be able to gather more data about this period.