It works. I found a spelling error in my XSLT (groan...). I am not sending a string to be magically processed. I am transforming it into a nodeset before setting the parameter for the transformation.

but it is pretty slow for such a small amount of data...

Your data is already structured, so it seems to be a bad
idea to bild something less structured (string) and then
parse it to regain the original structure. Furthermore,
DOM trees produce even more overhead.

I will look into your third suggestion it sounds like what i want to do.