It has more than just a few mistakes... The project was started back in May 2003 and its last official update was in Nov 2003. I also don't believe anyone else worked on it besides Martijn Pieters. The second link contains some additional notes from Firebeetle that he posted around 2008. I'm currently using some rough notes that Apanx made around 2010 as my primary source of bot file information.
I think Serge used the Python parser with his own modifications for his now discontinued BotExchange project. I'm, personally, more of a control freak so I made my own in Python and PHP parsers. I'm currently using the Python parser for a Practice Arena mod that I've been working on for just over three years now. As for the PHP parser, its going to be a part of the BotExchange that I hope to release very soon.