Debian has a decent collection of XSLT processors:
lib-xt-java: Works well. Style sheet parameter is handled effortlessly.
$ java com.jclark.xsl.sax.Driver <XML file> <XSL file> [id=wgi001]
sablotron: Works well but my sample genealogy style sheet with a parameter cause sablotron to find an error! (Perhaps it's stricter with XSL or else it does not implement some feature--not yet explored.)
$ sabcmd <XSL file> <XML file> [\$id=wgi001]
transformiix: Produces slightly different output to all the rest. Does not seem to allow assignment to parameters.
$ transfrmx -s <XSL file> -i <XML file>
xalan: Works well but could not get it to take the parameter?
$ xalan -xsl <XSL file> -in <XML file> [-param id wgi001]
xsltproc:
$ xsltproc [--param id wgi001] <XSL file> <XML file>