not out of the box.
But you can call out to a command line transformation tool like saxon using the SSH workflows, (or even run it via a local system Command object in Javascript, if you want that)
A more sophisticated way would be to create a plugin for vCO, that wraps a Java XSL Transformation library (like Saxon, again 
) and publishes the corresponding objects into vCO Javascript.
Cheers,
Joerg