The XSLT transformer allows you to perform a transformation between 2 types, using an XSLT. It is configured simply by specifying the to and from QNames, as well as the path to the XSLT to be applied.

<transform.xslt from="{http://acme/}A" to="{http://acme/}B" xsltFile="com/acme/xslt/A2B.xslt"/>