XML Parser - which do you use?

Hi,

If you're using XML as Database, which Parser do u use?
Just the expat, which is integrated in PHP with XSLT to modify documents?
Or do you use another one like MSXML, Xerces, XP, etc.

And do you use SAX or DOM?

Thx for the information.
piz

I used to use expat a lot, but i got tired of it; too monotonouse to program with.

Now I use an XSLT processor called Sablotron (http://www.gingerall.com/charlie/ga/xml/p_sab.xml), configured as a PHP extension for Apache.