I've used XSLT in the past, mainly to do client side transformations, so send the browser XML, with a XML stylesheet tag and have the browser use the XSL to do

I've used XSLT in the past, mainly to do client side transformations, so send the browser XML, with a XML stylesheet tag and have the browser use the XSL to do the transformation. At the time the only browser that didn't support it correctly was IE, but after some small work arounds it worked pretty well. The downside being that inserting ad networks didn't work because there is no document to .write() to being XML, and the fact that you had to host a valid DTD and your document would get verified against it each and every time. The other big issue was that you have to write a lot of boiler plate code to get it to do what you want it to do, with a lot of recursion and the like.