[Haskell-beginners] xml parsing

Hello, I want to write a program which among other should read some xml file. The xml tags will mostly be custom ones defined by a dtd. My question is: which parsing library to use? On http://en.wikibooks.org/wiki/Haskell/XML three libraries are mentioned, but a comparison and recommendation of which one to choose is missing. As you might imagine, I would like to use a library which is actively maintained? Has any of these libraries developed into a "standard" library? Thanks in advance for your help. ben