XSL Transformer memory problem

Hi.

I'm currently trying to transform huge xml documents using xslt. My problem resides in the implementation of the transformers, which I've so far tried to use. Xalan and xsltproc both builds in internal representation of the whole input file, and as a result a memory error occurs before the transformation process even starts.

Therefore I need a XSL Transformer, which doesn't build internal representations of the whole input file. Do you know such one?