Wikipedia on XML

I stumbled into Wikipedia's XML entry today and it's terrible.   
Sprawling, badly-organized, full of inessentials including some  
nonsense.

I'm going to invest a few hours part-time in coming weeks in trying to  
make it smaller and cleaner.  There are some related articles that  
need to be written, like maybe one on data formats for interchange  
purposes (sequester the whole boring XML vs JSON vs YAML vs S-exps  
over there).  Based on early efforts, I smell the possibility of edit  
wars; there's one gentleman who's defending an assertion, in the 2nd  
paragraph of the intro, that s-expressions are isomorphic to XML but  
no other data formats are, sigh.

If anyone wants to help, or to join a discussion on how the article  
should be structured, that'd be nice.  I guess the place to discuss  
would be on the article's Talk page?

  -Tim