Why did you use Sablotron XSLT parser for PiXSL?
When we have started to make PiXSL there were not too much XSLT parser available in the world. Sablotron was the first stable and usuable in the world. That’s why we have choosen this one. Maybe we will update PiXSL for another parsers than Sablotron, but we are looking for people to update this XSLT Tag module.