Specifications of Intuit's .QFX Format?

mad.frog asks: "I recently upgraded my ancient version of Quicken to the latest (Macintosh) version, with the intention of being able to download my credit card transactions directly from my bank into Quicken, rather than entering all that stuff by hand. As it turns out, almost no banks support doing this for non-Windows platforms (not surprisingly, Intuit doesn't point this out on the package). But here's the weird part: the information downloaded is just an xml-like text file (.QFX). Anyone know how (or why) they would make such a generic file platform-specific -- what business advantage does Intuit (or my bank) have in restricting how I use this information? Also, does anyone happen to know details of this (apparently undocumented, Intuit-specific) format so that I can hack mine into submission and use this data anyway, even if it's not on my bank's Platform Of Choice?"