The standard JAXP API only covers XSLT 1.0 facilities; the ability
to start
a transformation at a named template is specific to XSLT 2.0, so
for this
you need to drop into Saxon-specific classes. Cast the JAXP
Transformer
object to net.sf.saxon.Controller, and call the setInitialTemplate
() method;
then call the transform() method supplying null as the first argument.