If you want to help clarify the implementation differences across Python/SAX implementations and you are familiar with XSLT, please respond to Mike Brown's request for help. Andrew Clover's similar work for Python DOM implementations has proved a very useful resource, and it would be nice to have the same for SAX. Mike has done the hard part. He just needs someone to carry it across the finish line. I did discuss some of the unfortunate Python/SAX confusion in "Practical SAX Notes". A tabular analysis would be a nice addition to that discussion.