SQL99/SQL92 Grammar

Does anyone have a definitive BNF grammar of SQL99 or SQL92?  (I'd prefer 99 
but I'll take what I can get ;) 

I'm trying to make a simplified XML to SQL translator, and I need the 
grammar to do so (not Postgres's grammar...the standard grammar).  It must 
be available somewhere, because Postgres developers need to refer to it at 
some point... 

If the grammar is accompanied with explanations (like Postgres does in its 
online manual, or like Oracle in theirs), that would be best....but again, 
I'll take what I can get. 

I tried looking on the ANSI website, but with no results.  Damn 
bastards...how can they make a standard and then charge for you to see it?  
What the hell is the point if the 'standard' is not open to everyone who 
might need it?  What about the students and joe-blows in this world (like 
me) who don't work for a company and who don't have a ton of money to spend 
on stupid ANSI subscriptions.....? 

Oh sorry...I got off on a rant.... 

Regardless, I'd love the grammar or a link to where I can view it for 
_free_. 

Can anyone help a guy out?  Thanks! 

Les Hazlewood