Working with XML in Mozilla

A strong commitment to standards The Mozilla project has made a strong commitment to implementing XML, CSS, and the DOM according to the W3C specs. Among other things, they've thrown out their earlier LAYER-based scripting model.
Eating dog food The Mozilla interface itself is designed using (and customizable with) XML, CSS, and the DOM. XUL, the XML-Based Interface Language, makes all of this possible.
Wow - but still some holes It's still unclear how to mark content in XML documents as being scripts. The standard-base is astounding, but it's still not clear if all the parts are ready for widespread use.
Interoperability Strong DOM support should make it easier to write code that works across IE and Netscape, but it's too soon to do testing.